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As the importance of renewable energy sources becomes more and more apparent, look to our top-quality journals for cutting-edge reports on solar cell and photovoltaic research.

In May 2007 the Institute for Scientific Information listed the Top 20 Most Cited Papers on Solar Cells, with papers published in Advanced Functional Materials number one on both lists:

Most cited paper (1997-2007):

Most cited paper (2005-2007):

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Perovskite Solar Cells on Corrugated Substrates with Enhanced Efficiency

Perovskite Solar Cells on Corrugated Substrates with Enhanced Efficiency

A simple and scalable method to fabricate nano-scaled corrugations on substrate of perovskite solar cells is demonstrated. Faster chemical reaction between lead iodide and methyl ammonium iodide is observed in the corrugated devices. Optical field enhancements in the corrugated devices are confirmed with the finite-difference time-domain modeling and simulation. As a result, the perovskite solar cells fabricated on corrugated substrates show a 50% enhancement of power conversion efficiency compared to planar devices.

[Full Paper]
Yu Luo, Shuyi Liu, Nilesh Barange, Li Wang, Franky So
Small, September 27, 2016, DOI: 10.1002/smll.201601974. Read article

Bioinspired Superhydrophobic Highly Transmissive Films for Optical Applications

Bioinspired Superhydrophobic Highly Transmissive Films for Optical Applications

Superhydrophobic highly transmissive polymeric films inspired by hair-covered plant surfaces are fabricated using a scalable hot pulling technique. The flexible self-cleaning films are characterized by low reflection, high transmission, and high amount of forward scattering. These exceptional optical properties are exploited for improving the efficiency of organic light-emitting diodes and silicon-based solar cells.

[Full Paper]
Felix Vüllers, Guillaume Gomard, Jan B. Preinfalk, Efthymios Klampaftis, Matthias Worgull, Bryce Richards, Hendrik Hölscher, Maryna N. Kavalenka
Small, September 26, 2016, DOI: 10.1002/smll.201601443. Read article

Electron Transport in Quasi-Two-Dimensional Porous Network of Titania Nanoparticles, Incorporating Electrical and Optical Advantages in Dye-Sensitized Solar Cells

Electron Transport in Quasi‐Two‐Dimensional Porous Network of Titania Nanoparticles, Incorporating Electrical and Optical Advantages in Dye‐Sensitized Solar Cells

Staying on the straight and narrow: In a quasi-2D porous TiO2 the lateral electron diffusion is prevented and directional diffusion toward the collecting electrode is induced into the electron transport. As a result the electron diffusion coefficient and the collection efficiency increase while the effective surface area remains large. This leads to about 13 % improvement in the power conversion efficiency of the cell in comparison with traditional versions.

[Article]
Mohammad Javadi, Saba Alizadeh, Yusef Khosravi, Yaser Abdi
ChemPhysChem, September 26, 2016, DOI: 10.1002/cphc.201600609. Read article

Does Iodine or Thiocyanate Play a Role in p-Type Dye-Sensitized Solar Cells?

Does Iodine or Thiocyanate Play a Role in p‐Type Dye‐Sensitized Solar Cells?

Charge recombination at the NiO/electrolyte interface is a performance-limiting factor that prevents dye-sensitized p-type solar cells (p-DSCs) from matching the efficiency of conventional TiO2 devices. NiO appears to catalyze the oxidation of iodide but the addition of guanidinium thiocyanate inhibits recombination (see figure). These results suggest that new redox electrolytes will be needed if tandem DSCs are to exceed the efficiency of state-of-the-art TiO2 devices.

[Article]
Christopher J. Wood, Calum A. McGregor, Elizabeth A. Gibson
ChemElectroChem, September 26, 2016, DOI: 10.1002/celc.201600387. Read article

Ion-Exchange-Induced 2D–3D Conversion of HMA1−xFAxPbI3Cl Perovskite into a High-Quality MA1−xFAxPbI3 Perovskite

Ion‐Exchange‐Induced 2D–3D Conversion of HMA1−xFAxPbI3Cl Perovskite into a High‐Quality MA1−xFAxPbI3 Perovskite

High-quality phase-pure MA1−xFAxPbI3 (x=0.1–0.9) perovskite planar films were deposited in a facile manner by a one-step method. 2D HMA1−xFAxPbI3Cl perovskite (left) was transformed into 3D MA1−xFAxPbI3 perovskite (right) by ion exchange. This 2D–3D perovskite conversion is a promising strategy for fabricating mixed-cation lead halide perovskites. MA=methylammonium, FA=formamidinium.

[Communication]
Ge Li, Taiyang Zhang, Nanjie Guo, Feng Xu, Xufang Qian, Yixin Zhao
Angew. Chem. Int. Ed., September 26, 2016, DOI: 10.1002/anie.201606801. Read article

Engineering TiO2/Perovskite Planar Heterojunction for Hysteresis-Less Solar Cells

Engineering TiO2/Perovskite Planar Heterojunction for Hysteresis‐Less Solar Cells

Perovskite material quality has a preeminent impact on hysteresis. The presented method relies on solvent engineering during the casting process, leading to a thick film that ensures an optimal interface connection with the charge-extracting layer. This method allows obtaining perovskite active layer with superior optical properties, explaining the ideal device behavior and device performances.

[Full Paper]
Vanira Trifiletti, Norberto Manfredi, Andrea Listorti, Davide Altamura, Cinzia Giannini, Silvia Colella, Giuseppe Gigli, Aurora Rizzo
Adv. Mater. Interfaces, September 26, 2016, DOI: 10.1002/admi.201600493. Read article

Ternary Organic Solar Cells Based on Two Compatible Nonfullerene Acceptors with Power Conversion Efficiency >10%

Ternary Organic Solar Cells Based on Two Compatible Nonfullerene Acceptors with Power Conversion Efficiency >10%

Two different nonfullerene acceptors and one copolymer are used to fabricate ternary organic solar cells (OSCs). The two acceptors show unique interactions that reduce crystallinity and form a homogeneous mixed phase in the blend film, leading to a high efficiency of ≈10.3%, the highest performance reported for nonfullerene ternary blends. This work provides a new approach to fabricate high-performance OSCs.

[Communication]
Tao Liu, Yuan Guo, Yuanping Yi, Lijun Huo, Xiaonan Xue, Xiaobo Sun, Huiting Fu, Wentao Xiong, Dong Meng, Zhaohui Wang, Feng Liu, Thomas P. Russell, Yanming Sun
Adv. Mater., September 26, 2016, DOI: 10.1002/adma.201602570. Read article

Side-Chain Fluorination: An Effective Approach to Achieving High-Performance All-Polymer Solar Cells with Efficiency Exceeding 7%

Side‐Chain Fluorination: An Effective Approach to Achieving High‐Performance All‐Polymer Solar Cells with Efficiency Exceeding 7%

Side-chain fluorination of polymers is demonstrated as a highly effective strategy to improve the efficiency of all-polymer solar cells from 2.93% (nonfluorinated P1) to 7.13% (fluorinated P2). This significant enhancement is achieved by synergistic improvements in open-circuit voltage, charge generation, and charge transport, as fluorination of the donor polymer optimizes the band alignment and the film morphology.

[Communication]
Jiho Oh, Kakaraparthi Kranthiraja, Changyeon Lee, Kumarasamy Gunasekar, Seonha Kim, Biwu Ma, Bumjoon J. Kim, Sung-Ho Jin
Adv. Mater., September 26, 2016, DOI: 10.1002/adma.201602298. Read article

Synergistic Effect of PbI2 Passivation and Chlorine Inclusion Yielding High Open-Circuit Voltage Exceeding 1.15 V in Both Mesoscopic and Inverted Planar CH3NH3PbI3(Cl)-Based Perovskite Solar Cells

Synergistic Effect of PbI2 Passivation and Chlorine Inclusion Yielding High Open‐Circuit Voltage Exceeding 1.15 V in Both Mesoscopic and Inverted Planar CH3NH3PbI3(Cl)‐Based Perovskite Solar Cells

A synergistic effect of PbI2 passivation and chlorine incorporation induces suppression of non-radiative recombination in a perovskite film. This leads to a high open-circuit voltage exceeding 1.15 V in both mesoscopic and inverted planar CH3NH3PbI3(Cl)-based perovskite solar cells.

[Full Paper]
Fangyuan Jiang, Yaoguang Rong, Huawei Liu, Tiefeng Liu, Lin Mao, Wei Meng, Fei Qin, Youyu Jiang, Bangwu Luo, Sixing Xiong, Jinhui Tong, Yun Liu, Zaifang Li, Hongwei Han, Yinhua Zhou
Adv. Funct. Mater., September 26, 2016, DOI: 10.1002/adfm.201603968. Read article

Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells

Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells

Effective ligand engineering of Cu2ZnSnS4 (CZTS) nanocrystal surface is demonstrated to lead to improvement of the electrical properties of the thin film. Furthermore, surface-modified CZTS nanocrystals exhibit excellent hole transporting properties as the interface layer in a perovskite solar cell. The perfomance of perovskite devices is shown to vary from 12.2% to 15.4% as a function of ligand removal.

[Full Paper]
Laraib Sarfraz Khanzada, Ievgen Levchuk, Yi Hou, Hamed Azimi, Andres Osvet, Rameez Ahmad, Marco Brandl, Patrick Herre, Monica Distaso, Rainer Hock, Wolfgang Peukert, Miroslaw Batentschuk, Christoph J. Brabec
Adv. Funct. Mater., September 26, 2016, DOI: 10.1002/adfm.201603441. Read article

Supramolecular Hemicage Cobalt Mediators for Dye-Sensitized Solar Cells

A new class of dye-sensitized solar cells (DSCs) using the hemicage cobalt based mediator [Co(ttb)]2+/3+ with the highly preorganized hexadentate ligand 5,5'',5''''-((2,4,6-triethyl benzene-1,3,5-triyl)tris(ethane-2,1-diyl))tri-2,2'-bipyridine (ttb) have been fully characterized. The performance of DSCs sensitized with organic D-π-A dyes utilizing either [Co(ttb)]2+/3+ or the conventional [Co(bpy)₃]2+/3+ (bpy = 2,2'-bipyridine) redox mediator have comparable efficiency under 1000 Wm¯² AM 1.5G illumination. However, the hemicage complexes exhibit exceptional stability under thermal and light stress. In particular, a 120 hour continuous light illumination stability test for DSCs using [Co(ttb)]2+/3+ resulted in a 10% increase in performance, whereas 40% decrease in performance was found for [Co(bpy)₃]2+/3+ electrolyte based DSCs under the same conditions. The improved stability at high solar cell efficiencies demonstrates the great promise of [Co(ttb)]2+/3+ complexes as redox mediators for efficient, cost-effective, large-scale DSC devices.

[Article]
Marina Freitag, Wenxing Yang, Lisa A. Fredin, Luca D’Amario, K.Martin Karlsson, Anders Hagfeldt, Gerrit Boschloo
ChemPhysChem, September 23, 2016, DOI: 10.1002/cphc.201600985. Read article

Beneficial Role of Reduced Graphene Oxide for Electron Extraction in Highly Efficient Perovskite Solar Cells

Beneficial Role of Reduced Graphene Oxide for Electron Extraction in Highly Efficient Perovskite Solar Cells

rGO for efficiency! The effect of incorporating reduced graphene oxide (rGO) within the electron-transport, active, and hole-transport layers of a perovskite solar cell is investigated. Incorporation of rGO into the mesoporous TiO2 matrix results in highly efficient solar cells with power conversion efficiency of up to 19.54 %.

[Communication]
Kyung Taek Cho, Giulia Grancini, Yonghui Lee, Dimitrios Konios, Sanghyun Paek, Emmanuel Kymakis, Mohammad Khaja Nazeeruddin
ChemSusChem, September 22, 2016, DOI: 10.1002/cssc.201601070. Read article

Head-to-Head Linkage Containing Bithiophene-Based Polymeric Semiconductors for Highly Efficient Polymer Solar Cells

Head‐to‐Head Linkage Containing Bithiophene‐Based Polymeric Semiconductors for Highly Efficient Polymer Solar Cells

Narrow bandgap (1.37–1.46 eV) polymers incorporating a head-to-head linkage containing 3-alkoxy-3′-alkyl-2,2′-bithiophene are synthesized. The head-to-head linkage enables polymers with sufficient solubility and the noncovalent sulfur–oxygen interaction affords polymers with high degree of backbone planarity and film ordering. When integrated into polymer solar cells, the polymers show a promising power conversion efficiency approaching 10%.

[Communication]
Shengbin Shi, Qiaogan Liao, Yumin Tang, Han Guo, Xin Zhou, Yulun Wang, Tingbin Yang, Yongye Liang, Xing Cheng, Feng Liu, Xugang Guo
Adv. Mater., September 22, 2016, DOI: 10.1002/adma.201603112. Read article

Strontium Insertion in Methylammonium Lead Iodide: Long Charge Carrier Lifetime and High Fill-Factor Solar Cells

Strontium Insertion in Methylammonium Lead Iodide: Long Charge Carrier Lifetime and High Fill‐Factor Solar Cells

The addition of Sr2+ in CH3NH3PbI3 perovskite films enhances the charge carrier collection efficiency of solar cells leading to very high fill factors, up to 85%. The charge carrier lifetime of Sr2+-containing perovskites is in excess of 40 μs, longer than those reported for perovskite single crystals.

[Communication]
Daniel Pérez-del-Rey, Dávid Forgács, Eline M. Hutter, Tom J. Savenije, Dennis Nordlund, Philip Schulz, Joseph J. Berry, Michele Sessolo, Henk J. Bolink
Adv. Mater., September 22, 2016, DOI: 10.1002/adma.201603016. Read article

Performance improvement for epitaxially grown SiGe on Si solar cell by optimizing the back surface field

Performance improvement for epitaxially grown SiGe on Si solar cell by optimizing the back surface field

III–V on Si tandem solar cell has the potential for lower cost. Efficiency improvement of SiGe on Si solar cell was demonstrated by optimizing the back surface field. This SiGe cell can be used as the bottom cell in a III–V on Si tandem solar cell.

[rrl solar]
Dun Li, Xin Zhao, Li Wang, Brianna Conrad, Anastasia Soeriyadi, Anthony Lochtefeld, Andrew Gerger, Allen Barnett, Ivan Perez-Wurfl
Phys. Status Solidi RRL, September 21, 2016, DOI: 10.1002/pssr.201600231. Read article

ZnO Nanostructures for Dye-Sensitized Solar Cells Using the TEMPO+/TEMPO Redox Mediator and Ruthenium(II) Photosensitizers with 1,2,3-Triazole-Derived Ligands

ZnO Nanostructures for Dye‐Sensitized Solar Cells Using the TEMPO+/TEMPO Redox Mediator and Ruthenium(II) Photosensitizers with 1,2,3‐Triazole‐Derived Ligands

Solar cells free from iodine and thiocyanate: TEMPO+/TEMPO electrolyte in combination with thiocyanate-free RuII complexes were investigated in ZnO-based dye-sensitized solar cells (DSSCs). DSSCs with bis(tridentate) RuII complexes bearing 1,2,3-triazole-derived NNN-, NCN-, and CNC-coordinating ligands (see figure) show promising power conversion and external quantum efficiencies comparable to DSSCs with iodine-based electrolytes and thiocyanate-based RuII complexes.

[Full Paper]
Ruri Agung Wahyuono, Benjamin Schulze, Mihai Rusu, Maria Wächtler, Jan Dellith, Martin Seyring, Markus Rettenmayr, Jonathan Plentz, Anna Ignaszak, Ulrich S. Schubert, Benjamin Dietzek
ChemPlusChem, September 20, 2016, DOI: 10.1002/cplu.201600377. Read article

A Novel Naphtho[1,2-c:5,6-c′]Bis([1,2,5]Thiadiazole)-Based Narrow-Bandgap π-Conjugated Polymer with Power Conversion Efficiency Over 10%

A Novel Naphtho[1,2‐c:5,6‐c′]Bis([1,2,5]Thiadiazole)‐Based Narrow‐Bandgap π‐Conjugated Polymer with Power Conversion Efficiency Over 10%

A novel naphtho[1,2-c:5,6-c′]bis([1,2,5]­thiadiazole)-based narrow-bandgap π-conjugated polymer is designed for application in polymer solar cells. Remarkable power conversion efficiencies over 10% can be achieved based on both conventional and inverted device architectures with thick photoactive layers, which are processed by using chlorinated or nonhalogenated solvents, suggesting its great promise toward practical applications based on high-throughput roll-to-roll processing.

[Communication]
Yaocheng Jin, Zhiming Chen, Sheng Dong, Nannan Zheng, Lei Ying, Xiao-Fang Jiang, Feng Liu, Fei Huang, Yong Cao
Adv. Mater., September 20, 2016, DOI: 10.1002/adma.201603178. Read article

Deciphering the Role of Impurities in Methylammonium Iodide and Their Impact on the Performance of Perovskite Solar Cells

Deciphering the Role of Impurities in Methylammonium Iodide and Their Impact on the Performance of Perovskite Solar Cells

Here, a chemical study of the impurities formed during CH3NH3I preparation and their impact on solar cell processing is reported. These impurities initiate PbHPO3 nanoparticles formation in the perovskite precursor solution, with further seed growth of grains. The detrimental role of the impurities is best demonstrated by comparing perovskite solar cell devices fabricated from impurity-free precursors versus precursors containing different concentrations of impurities.

[Full Paper]
Ievgen Levchuk, Yi Hou, Marco Gruber, Marco Brandl, Patrick Herre, Xiaofeng Tang, Florian Hoegl, Miroslaw Batentschuk, Andres Osvet, Rainer Hock, Wolfgang Peukert, Rik R. Tykwinski, Christoph J. Brabec
Adv. Mater. Interfaces, September 19, 2016, DOI: 10.1002/admi.201600593. Read article

Nonfullerene Tandem Organic Solar Cells with High Open-Circuit Voltage of 1.97 V

Nonfullerene Tandem Organic Solar Cells with High Open‐Circuit Voltage of 1.97 V

Small-molecule nonfullerene-based tandem organic solar cells (OSCs) are fabricated for the first time by utilizing P3HT:SF(DPPB)4 and PTB7-Th:IEIC bulk heterojunctions as the front and back subcells, respectively. A power conversion efficiency of 8.48% is achieved with an ultrahigh open-circuit voltage of 1.97 V, which is the highest voltage value reported to date among efficient tandem OSCs.

[Communication]
Wenqing Liu, Shuixing Li, Jiang Huang, Shida Yang, Jiehuan Chen, Lijian Zuo, Minmin Shi, Xiaowei Zhan, Chang-Zhi Li, Hongzheng Chen
Adv. Mater., September 16, 2016, DOI: 10.1002/adma.201603518. Read article

Functional Single-Walled Carbon Nanotubes and Nanoengineered Networks for Organic- and Perovskite-Solar-Cell Applications

Functional Single‐Walled Carbon Nanotubes and Nanoengineered Networks for Organic‐ and Perovskite‐Solar‐Cell Applications

The state of the art in functionalized single-walled carbon nanotubes (SWNTs) and conductive networks for opto-electronic applications is reviewed. An outlook on new strategies for enhancing charge extraction and transport in photovoltaic systems incorporating SWNTs is discussed, including organic photovoltaics and the new field of perovskite-based photovoltaics.

[Progress Report]
David R. Barbero, Samuel D. Stranks
Adv. Mater., September 16, 2016, DOI: 10.1002/adma.201600659. Read article

Above-Bandgap Photovoltages in Antiferroelectrics

Above‐Bandgap Photovoltages in Antiferroelectrics

This paper presents the first antiferroelectric solar cell. Here this study shows that antiferroelectric thin films photovoltaic current can be switched on when biased into the polar phase to generate above-bandgap photovoltages in excess of 100 V and photovoltaic fields of several megavolts per centimeter, the largest ever measured for any material.

[Communication]
Amador Pérez-Tomás, Monica Lira-Cantú, Gustau Catalan
Adv. Mater., September 15, 2016, DOI: 10.1002/adma.201603176. Read article

Steady-State, Scalable Production of Mesoporous Rutile and Brookite Particles and Their Use in Energy Conversion and Storage Cells

Steady‐State, Scalable Production of Mesoporous Rutile and Brookite Particles and Their Use in Energy Conversion and Storage Cells

A continuously stirred tank reactor (CSTR) was employed to synthesize TiO2 nanoparticles. Tuning the aqueous TiCl4 concentration and consequently the solution pH gives rutile aggregates with a cauliflower-like morphology and an internal structure of self-assembled nanoneedles (>0.5 M) or planar brookite nanoplatelets (0.1 M). The mesoporous rutile particles have excellent light scattering properties and the brookite nanoplatelets exhibit stable Li-ion intercalation functionality.

[Full Paper]
Amrita Yasin, Fuqiang Guo, Micah J. Sussman, Raynald Gauvin, George P. Demopoulos
ChemNanoMat, September 13, 2016, DOI: 10.1002/cnma.201600185. Read article

A Strategy to Simplify the Preparation Process of Perovskite Solar Cells by Co-deposition of a Hole-Conductor and a Perovskite Layer

A Strategy to Simplify the Preparation Process of Perovskite Solar Cells by Co‐deposition of a Hole‐Conductor and a Perovskite Layer

The feasibility of co-depositing a hole-conductor and a perovskite layer is demonstrated to simplify the preparation process of perovskite solar cells. The CuSCN incorporated in the perovskite layer can participate in forming the perovskite/CuSCN bulk-heterojunction and accelerate hole-transport effectively, which eventually leads to a maximum power conversion efficiency of 18.1% with almost no JV hysteresis.

[Communication]
Senyun Ye, Haixia Rao, Weibo Yan, Yunlong Li, Weihai Sun, Haitao Peng, Zhiwei Liu, Zuqiang Bian, Yongfang Li, Chunhui Huang
Adv. Mater., September 13, 2016, DOI: 10.1002/adma.201603850. Read article

Ternary-Blend Polymer Solar Cells Combining Fullerene and Nonfullerene Acceptors to Synergistically Boost the Photovoltaic Performance

Ternary‐Blend Polymer Solar Cells Combining Fullerene and Nonfullerene Acceptors to Synergistically Boost the Photovoltaic Performance

A ternary-blend strategy is presented to surmount the shortcomings of both fullerene derivatives and nonfullerene small molecules as acceptors for the first time. The optimal ternary device shows a high power conversion efficiency (PCE) of 10.4%. Moreover, a significant enhancement in PCE (≈35%) relative to both of the binary reference devices, which has never been achieved before in high-efficiency ternary devices, is demonstrated.

[Communication]
Heng Lu, Jicheng Zhang, Jianya Chen, Qian Liu, Xue Gong, Shiyu Feng, Xinjun Xu, Wei Ma, Zhishan Bo
Adv. Mater., September 13, 2016, DOI: 10.1002/adma.201603588. Read article

Boosting Perovskite Solar Cells Performance and Stability through Doping a Poly-3(hexylthiophene) Hole Transporting Material with Organic Functionalized Carbon Nanostructures

Boosting Perovskite Solar Cells Performance and Stability through Doping a Poly‐3(hexylthiophene) Hole Transporting Material with Organic Functionalized Carbon Nanostructures

Improved photovoltaic efficiencies and stabilities over prolonged times are demonstrated for perovskite solar cells based on a poly-3(hexylthiophene) layer doped with organic functionalized single-walled carbon nanotubes and reduced graphene oxide with respect to a reference device based on the undoped polymer.

[Full Paper]
Teresa Gatti, Simone Casaluci, Mirko Prato, Marco Salerno, Francesco Di Stasio, Alberto Ansaldo, Enzo Menna, Aldo Di Carlo, Francesco Bonaccorso
Adv. Funct. Mater., September 13, 2016, DOI: 10.1002/adfm.201602803. Read article

Constructing Synergetic Tri-Layered TiO2 Photoanode Based on Flexible Nanotube Array/Ti Substrate for Efficient Solar Cells

A TiO2 photoelectrode on flexible Ti substrate for dye-sensitized solar cells was constructed via layer-by-layer assembly of one-dimensional (1D) nanotube arrays (bottom layer), three-dimensional (3D) microsized leaves (intermediate layer), and zero-dimensional (0D) TiO2 nanoparticles (top layer) by anodic oxidation, hydrothermal approach and screen coating, respectively. The novel 1D−3D buxus-liked bilayer presents superior light scattering and favorable charge collection. After integrating 14 μm TiO2 nanoparticles with a 12 μm buxus-liked double layered photoanode, an excellent power conversion efficiency of 8.02 % (short circuit current density Jsc = 17.03 mA cm−2, open circuit voltage Voc = 0.78 V, and fill factor FF = 60.4 %) was obtained, which outperformed that (6.30 %) of a cell based on titanium nanotube arrays−TiO2 nanoparticles with a similar film thickness.

[Full Paper]
Yanli Zhao, Yang Wang, Xueqin Liu, Zhen Li, Ya Cao, Yinchang Li
ChemNanoMat, September 12, 2016, DOI: 10.1002/cnma.201600243. Read article

Theoretical investigation on the passivation layer with linearly graded bandgap for the amorphous/crystalline silicon heterojunction solar cell

Theoretical investigation on the passivation layer with linearly graded bandgap for the amorphous/crystalline silicon heterojunction solar cell

Passivation layer with linearly graded bandgap (LGB) was proposed to improve the performance of amorphous/crystalline silicon heterojunction (SHJ) solar cell by eliminating the spike-like barrier occurring at a-Si:H/c-Si interface. Theoretical simulation shows that such LGB passivation layer could improve the solar cell efficiency (η) by enhancing the fill factor (FF) greatly, especially when the passivation layer was relatively thick, which would be very helpful for the real solar cell fabrication.

[Rapid Research Letter]
Lei Zhao, Guanghong Wang, Hongwei Diao, Wenjing Wang
Phys. Status Solidi RRL, September 05, 2016, DOI: 10.1002/pssr.201600246. Read article

Advances in the Application of Atomic Layer Deposition for Organometal Halide Perovskite Solar Cells

Advances in the Application of Atomic Layer Deposition for Organometal Halide Perovskite Solar Cells

Atomic layer deposition (ALD) can deposit high-quality compact thin films with good accuracy and low temperature, which may help to solve the challenges related to power conversion efficiency and stability of organometal halide perovskite solar cells. This review highlights the key developments using ALD in synthesizing basic building blocks and optimizing perovskite solar cell performances.

[Review]
Kaimo Deng, Liang Li
Adv. Mater. Interfaces, September 01, 2016, DOI: 10.1002/admi.201600505. Read article

Increased open-circuit voltage of ZnO nanowire/PbS quantum dot bulk heterojunction solar cells with solution-deposited Mg(OH)2 interlayer

Increased open‐circuit voltage of ZnO nanowire/PbS quantum dot bulk heterojunction solar cells with solution‐deposited Mg(OH)2 interlayer

An ultrathin Mg(OH)2 interlayer was successfully solution-deposited at the heterojunction of ZnO nanowire/PbS quantum dot solar cells to passivate surface defects of ZnO and provide a tunnel barrier for the interface charge recombination, which is proved to dramatically improve Voc by 33% and PCE by 25%.

[Rapid Research Letter]
Shuaipu Zang, Yinglin Wang, Wei Su, Hancheng Zhu, Gang Li, Xintong Zhang, Yichun Liu
Phys. Status Solidi RRL, August 31, 2016, DOI: 10.1002/pssr.201600220. Read article

Photo-enhanced catalytic activity of spray-coated Cu2SnSe3 nanoparticle counter electrode for dye-sensitised solar cells

Photo-excitation of the nanostructured Cu2SnSe3 counter electrode provides a higher overpotential for electrolyte reduction, giving improved catalytic performance.

Photo‐enhanced catalytic activity of spray‐coated Cu2SnSe3 nanoparticle counter electrode for dye‐sensitised solar cells

Dye-sensitised solar cell counter electrodes are produced using earth-abundant Cu2SnSe3 nanoparticles, by a simple spray-coating and low-temperature annealing process. The counter electrodes were highly textured, contributing to good catalytic activity and solar cell efficiency close to the commonly-used Pt. It is shown that photoexcitation of the nanostructured Cu2SnSe3 counter electrode provides a higher overpotential for electrolyte reduction, giving improved catalytic performance.

[rrl solar]
Soosaimanickam Ananthakumar, Xuan Li, Ann-Louise Anderson, Pelin Yilmaz, Steve Dunn, Sridharan Moorthy Babu, Joe Briscoe
Phys. Status Solidi RRL, August 31, 2016, DOI: 10.1002/pssr.201600207. Read article

Materials Informatics: Statistical Modeling in Material Science

Materials Informatics: Statistical Modeling in Material Science

[Review]
Abraham Yosipof, Klimentiy Shimanovich, Hanoch Senderowitz
Mol. Inf., August 31, 2016, DOI: 10.1002/minf.201600047. Read article

Transition-Metal-Modified Polyaniline Nanofiber Counter Electrode for Dye-Sensitized Solar Cells

Transition‐Metal‐Modified Polyaniline Nanofiber Counter Electrode for Dye‐Sensitized Solar Cells

Key achievements: Polyaniline (PANI) electrodes are modified with different transition-metal ions (Ni2+, Co2+, Mn2+, and Cu2+) to improve the catalytic activity. The photovoltaic performances of dye-sensitized solar cells based on the PANI–Ni2+ and PANI–Co2+ counter electrodes (CEs) are evaluated and are found to exhibit power conversion efficiencies of 4.70 and 4.57 %, respectively, which are both higher than that of the pristine PANI CE-based device (3.87 %).

[Article]
Kezhong Wu, Lei Chen, Xiaolong Sun, Mingxing Wu
ChemElectroChem, August 31, 2016, DOI: 10.1002/celc.201600326. Read article

Benzodithiophene-Based Polymers Containing Alkylthiophenyl Side Chains with Lowered HOMO Energy Levels for Organic Solar Cells

Benzodithiophene‐Based Polymers Containing Alkylthiophenyl Side Chains with Lowered HOMO Energy Levels for Organic Solar Cells

A drop in the HOMO: Alkylthiophenyl is introduced as a side chain in a benzodithiophene (BDT) photovoltaic polymer for the first time. Three BDT-based polymers (copolymerized with 4,7-di(4-(2-ethylhexyl)-2-thienyl)-2,1,3-benzothiadiazole (DTBT), quinoxaline, and diketopyrrolopyrrole (DPP)) are synthesized. The HOMO levels of these three polymers are 0.14 eV lower than their counterpart polymers. Low HOMO levels (−5.49 eV, −5.34 eV, and −5.50 eV) are achieved to get polymer solar cells with high Voc values.

[Full Paper]
Meijie Fan, Zhengkun Du, Weiye Chen, Deyu Liu, Shuguang Wen, Mingliang Sun, Renqiang Yang
Asian J. Org. Chem., August 24, 2016, DOI: 10.1002/ajoc.201600244. Read article

Synthesis and Characterization of Diethylphosphonate and Carboxylate–appended Iridium Complexes for the Application on Dye-Sensitized Solar Cells

Synthesis and Characterization of Diethylphosphonate and Carboxylate–appended Iridium Complexes for the Application on Dye‐Sensitized Solar Cells

We study the effect of carboxylate and diethylphosphonate anchoring groups, on the optical properties of cyclometalated iridium(III) complexes and further applied these complexes in Dye-Sensitized Solar Cells. Although the phosphonate-appended iridium complexes present stronger bonding to the TiO2 surface in aqueous solution, the highest power conversion efficiency was obtained from the carboxylate-appended complexes.

[Full Paper]
Ainara Telleria, B. S. Emerson C. Kohlrausch, Rodrigo da C. Duarte , Fabiano S. Rodembusch, Jairton Dupont, Zoraida Freixa , Marcos J. L. Santos
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600700. Read article

Cobalt Sulfide as Counter Electrode in p-Type Dye-Sensitized Solar Cells

Cobalt Sulfide as Counter Electrode in p‐Type Dye‐Sensitized Solar Cells

The application of cobalt sulfide as counter electrodes in a p-type dye sensitized solar cell, using I-/I3- as redox electrolyte and erythrosine B as photosensitizer anchored to p-type nickel oxide. The charge separation happens at the interface erythrosine//electrolyte after the absorption of a photon. In our configuration, the reduced redox mediator (I-) have been regenerated at the anode: a conducting transparent oxide (TCO) covered with a thin layer of CoS.

[Full Paper]
Mirko Congiu, Matteo Bonomo, Maria Letizia De Marco, Denis P. Dowling, Aldo Di Carlo, Danilo Dini, Carlos F. O. Graeff 
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600297. Read article

Role of the Bulky Aryloxy Group at the Non-Peripheral Position of Phthalocyanines for Dye Sensitized Solar Cells

Role of the Bulky Aryloxy Group at the Non‐Peripheral Position of Phthalocyanines for Dye Sensitized Solar Cells

A selective performance: Photovoltaic performance of carboxyZnPc substituted with bulky semiflexible aryloxy groups at the non-peripheral positions (see structure) is clearly influenced by the steric hindrance of the substituents with respect to the semiconducting surface. Thus, regioisomers with substituents oriented towards the carboxylic acid anchoring group turn out to have lower adsorption densities, and, consequently, lower short-circuit photocurrents (Jsc) and efficiencies.

[Communication]
Lara Tejerina, M. Victoria Martínez-Díaz, Mohammad K. Nazeeruddin, Michael Grätzel, Tomas Torres
ChemPlusChem, July 20, 2016, DOI: 10.1002/cplu.201600325. Read article

Naphthalenediimide-alt-Fused Thiophene D–A Copolymers for the Application as Acceptor in All-Polymer Solar Cells

Naphthalenediimide‐alt‐Fused Thiophene D–A Copolymers for the Application as Acceptor in All‐Polymer Solar Cells

Donor selection: Three n-type alternating donor–acceptor type naphthalenediimide (NDI)–arylene copolymers, constructed from donor units with varied electron-donating strength were synthesized for the application as acceptor materials in all-polymer solar cells (all-PSCs). The results indicate that a larger conjugated fused molecular plane with more thiophene rings as donor units is beneficial to reduce the band gap, broaden the absorption, and enhance the photovoltaic performance of the copolymer acceptors.

[Full Paper]
Lingwei Xue, Yankang Yang, Zhi-Guo Zhang, Jing Zhang, Liang Gao, Haijun Bin, YunXu Yang, Yongfang Li
Chem. Asian J., July 05, 2016, DOI: 10.1002/asia.201600450. Read article

Understanding Solvent Manipulation of Morphology in Bulk-Heterojunction Organic Solar Cells

Understanding Solvent Manipulation of Morphology in Bulk‐Heterojunction Organic Solar Cells

The shape of things to come: Film morphology greatly influences the performance of bulk-heterojunction (BHJ)-structure-based solar cells. The control of the morphology of BHJ devices has been a major focus of research efforts over the last decade. Four solvent-related methods, including solvent selection, solvent mixing, solvent vapor annealing, and solvent soaking can efficiently control the morphology of BHJ films and are reviewed herein.

[Focus Review]
Yuxia Chen, Chuanlang Zhan, Jiannian Yao
Chem. Asian J., June 02, 2016, DOI: 10.1002/asia.201600374. Read article

Effectively Improving Extinction Coefficient of Benzodithiophene and Benzodithiophenedione-based Photovoltaic Polymer by Grafting Alkylthio Functional Groups

Effectively Improving Extinction Coefficient of Benzodithiophene and Benzodithiophenedione‐based Photovoltaic Polymer by Grafting Alkylthio Functional Groups

What a difference an S makes: Alkylthio substitution on the conjugated thiophene side chains in benzodithiophene (BDT) and benzodithiophenedione (BDD)-based photovoltaic polymer can effectively improve the extinction coefficient. The higher extinction coefficient of PBD-S results in higher external quantum efficiencies (EQE) and power conversion efficiency (PCE) in its corresponding polymer solar cells.

[Communication]
Qi Wang, Shaoqing Zhang, Bowei Xu, Long Ye, Huifeng Yao, Yong Cui, Hao Zhang, Wenxia Yuan, Jianhui Hou
Chem. Asian J., February 02, 2016, DOI: 10.1002/asia.201501387. Read article

Visible-Light-Driven Water Oxidation on a Photoanode by Supramolecular Assembly of Photosensitizer and Catalyst

Visible‐Light‐Driven Water Oxidation on a Photoanode by Supramolecular Assembly of Photosensitizer and Catalyst

A “take-charge” guest: A ruthenium water oxidation catalyst was incorporated on the surface of a dye-sensitized nanostructured TiO2 film when it formed a host–guest adduct with the chromophore, providing a new strategy for photoanode construction.

[Communication]
Hua Li, Fei Li, Yong Wang, Lichen Bai, Fengshou Yu, Licheng Sun
ChemPlusChem, January 28, 2016, DOI: 10.1002/cplu.201500539. Read article

Synthesis and Characterization of Phenothiazine-Based Platinum(II)–Acetylide Photosensitizers for Efficient Dye-Sensitized Solar Cells

Synthesis and Characterization of Phenothiazine-Based Platinum(II)–Acetylide Photosensitizers for Efficient Dye-Sensitized Solar Cells

An attractive power conversion efficiency (η) of up to 5.78 %, a short-circuit photocurrent density of 10.98 mA cm−2, an open-circuit photovoltage of 0.738 V, and a fill factor of 0.713 are displayed by the newly synthesized PT1-based dye-sensitized solar cell (DSSC) device. These findings provide strong evidence that platinum–acetylide complexes have great potential as promising photosensitizers in DSSC applications.

[Full Paper]
Chi-Ho Siu, Lawrence Tien Lin Lee, Sze-Chun Yiu, Po-Yu Ho, Panwang Zhou, Cheuk-Lam Ho, Tao Chen, Jianrong Liu, Keli Han, Wai-Yeung Wong
Chem. Eur. J., December 11, 2015, DOI: 10.1002/chem.201503828. Read article.

Color Bricks: Building Highly Organized and Strongly Absorbing Multicomponent Arrays of Terpyridyl Perylenes on Metal Oxide Surfaces

Color Bricks: Building Highly Organized and Strongly Absorbing Multicomponent Arrays of Terpyridyl Perylenes on Metal Oxide Surfaces

Socket and linker: Terpyridine-substituted perylenes containing cyclic anhydrides were assembled as monomolecular layers on metal oxide surfaces. Bis(terpyridyl) perylene diimides were used as linkers to build supramolecular assemblies by coordination with Zn2+ ions (see figure). With proper selection of the anchor and linker highly stable, deeply colored, multilayer structures with greater than ten successive layers were prepared.

[Full Paper]
Essi Sariola-Leikas, Zafar Ahmed, Paola Vivo, Anniina Ojanperä, Kimmo Lahtonen, Jesse Saari, Mika Valden, Helge Lemmetyinen, Alexander Efimov
Chem. Eur. J., December 3, 2015, DOI: 10.1002/chem.201503738. Read article.

Azafullerene C59N in Donor–Acceptor Dyads: Synthetic Approaches and Properties

Azafullerene C59N in Donor–Acceptor Dyads: Synthetic Approaches and Properties

Energy conversion schemes: Donor–acceptor systems based on the azafullerene C59N are reviewed. While focusing on the synthetic strategies, the properties of systems employing this azafullerene as electron or energy acceptor are also presented, unfolding both the synthetic access as well as the unique electronic properties of these systems. Both in dyads in solution as well as in solar cell devices, C59N is revealed as a promising acceptor for energy conversion schemes.

[Minireview]
Georgios Rotas, Nikos Tagmatarchis
Chem. Eur. J., November 26, 2015, DOI: 10.1002/chem.201502190. Read article.

Understanding the External Quantum Efficiency of Organic Homo-Tandem Solar Cells Utilizing a Three-Terminal Device Architecture

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A three-terminal tandem solar cell architecture enables detailed studies of the external quantum efficiencies (EQEs) of organic homo-tandem solar cells. Due to optoelectronic equality, all results can be transferred to conventional two-terminal tandem cells including a detailed study of subcell saturation by monochromatic bias light and bias voltage needed for accurate EQE measurements.

[Full Paper]
Daniel Bahro, Manuel Koppitz, Adrian Mertens, Konstantin Glaser, Jan Mescher, Alexander Colsmann
Adv. Energy Mater., August 26, 2015, DOI: 10.1002/aenm.201501019. Read article

Thin-Film Solar Cells with InP Absorber Layers Directly Grown on Nonepitaxial Metal Substrates

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The design and performance of solar cells based on InP grown by the nonepitaxial thin-film vapor–liquid–solid growth technique is investigated. The cell structure consists of a Mo back contact, p-InP absorber layer, n-TiO2 electron selective contact, and indium tin oxide transparent top electrode. The highest measured open circuit voltage (VOC) under 1 sun is 692 mV, which approaches the optically implied VOC of ≈795 mV extracted from the luminescence yield of p-InP.

[Full Paper]
Maxwell Zheng, Hsin-Ping Wang, Carolin M. Sutter-Fella, Corsin Battaglia, Shaul Aloni, Xufeng Wang, James Moore, Jeffrey W. Beeman, Mark Hettick, Matin Amani, Wei-Tse Hsu, Joel W. Ager, Peter Bermel, Mark Lundstrom, Jr-Hau He, Ali Javey
Adv. Energy Mater., August 25, 2015, DOI: 10.1002/aenm.201501337. Read article

Water Ingress in Encapsulated Inverted Organic Solar Cells: Correlating Infrared Imaging and Photovoltaic Performance

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Lifetime limitations of current-generation inverted and encapsulated organic solar cells under damp heat conditions are identified by correlating photovoltaic device performance with lock-in IR imaging techniques. The combination of electroluminescence imaging and water diffusion modeling may inform strategies for predicting early performance losses in solar cells and modules.

[Full Paper]
Jens Adams, Michael Salvador, Luca Lucera, Stefan Langner, George D. Spyropoulos, Frank W. Fecher, Monika M. Voigt, Simon A. Dowland, Andres Osvet, Hans-Joachim Egelhaaf, Christoph J. Brabec
Adv. Energy Mater., August 12, 2015, DOI: 10.1002/aenm.201501065. Read article

Large Efficiency Improvement in Cu2ZnSnSe4 Solar Cells by Introducing a Superficial Ge Nanolayer

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A large improvement of Cu2ZnSnSe4 solar cell efficiency is presented based on the introduction of a Ge superficial nanolayer. This improvement is explained by three complementary effects: the formation of a liquid Ge-related phase, the possible reduction of Sn multicharge states, and the formation of GeOx nanoinclusions, which lead to an impressive solar cell (VOC) increase.

[Communication]
Sergio Giraldo, Markus Neuschitzer, Thomas Thersleff, Simón López-Marino, Yudania Sánchez, Haibing Xie, Mónica Colina, Marcel Placidi, Paul Pistor, Victor Izquierdo-Roca, Klaus Leifer, Alejandro Pérez-Rodríguez, Edgardo Saucedo
Adv. Energy Mater., August 07, 2015, DOI: 10.1002/aenm.201501070. Read article

Light-Induced Self-Poling Effect on Organometal Trihalide Perovskite Solar Cells for Increased Device Efficiency and Stability

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Continuous illumination of the organometal trihalide perovskite (OTP) devices can cause the photovoltaic poling effect, termed light-induced self-poling (LISP), which improves the stabilized device efficiency significantly. The effect of LISP is comparable to the poling by an externally applied electric field, which can be explained by the redistribution of ions/vacancies within the OTP layers driven by photovoltage-induced additional electric field.

[Communication]
Yehao Deng, Zhengguo Xiao, Jinsong Huang
Adv. Energy Mater., August 07, 2015, DOI: 10.1002/aenm.201500721. Read article

High-Performance Flexible Nanostructured Silicon Solar Modules with Plasmonically Engineered Upconversion Medium

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Plasmonically enhanced upconverion luminescence is exploited to improve the collection efficiency of above-bandgap, long-wavelength photons in ultrathin nanostructured silicon solar microcells. A composite solar module integrated with plasmonic silver nanostructures and upconversion printing medium enables the performance enhancement of surface-embedded 8 μm thick nanostructured silicon microcells by synergistic effects of plasmonically enhanced spectral upconversion, waveguiding, and fluorescence of upconversion nanocrystals.

[Full Paper]
Sung-Min Lee, Weigu Li, Purnim Dhar, Sergey Malyk, Yu Wang, Wonmok Lee, Alexander Benderskii, Jongseung Yoon
Adv. Energy Mater., August 03, 2015, DOI: 10.1002/aenm.201500761. Read article

Chemical Consequences of Alkali Inhomogeneity in Cu2ZnSnS4 Thin-Film Solar Cells

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Cu2ZnSnS4-based solar cells lacking an alkali diffusion barrier contain a non-uniform distribution of Na in the absorber layer. Samples containing Na “hot spots” have corresponding light beam induced current hot spots on comparable length scales. Na hot spots are also correlated with increased Cu in-diffusion with the underlying MoS2 layer and decreased diffusion of Cd to the back contact.

[Full Paper]
Talia Gershon, Cayla Hamann, Marinus Hopstaken, Yun Seog Lee, Byungha Shin, Richard Haight
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500922. Read article

Diketopyrrolopyrroles with a Distinct Energy Level Cascade for Efficient Charge Carrier Generation in Organic Solar Cells

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Tailored low molecular weight diketopyrrolopyrrole compounds with a precise energy level offset are synthesized by tuning the electron deficiency on the terminal aryl unit. Application of these compounds in cascade solar cells in combination with C60 leads to drastically increased short-circuit current densities and power conversion efficiencies.

[Full Paper]
Christian J. Mueller, Michael Brendel, Pia Ruckdeschel, Jens Pflaum, Mukundan Thelakkat
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500914. Read article

Charge Accumulation and Hysteresis in Perovskite-Based Solar Cells: An Electro-Optical Analysis

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Electric-field and charge accumulation-induced perovskite structure response are used to explain the hysteresis and ultraslow dynamics in CH3NH3PbI3 (MAPbI3) perovskite-based solar cells. The charge transfer efficiency at perovskite interfaces is found to be significant in determining the severity of the hysteresis in perovskite photovoltaic devices. The interface between perovskite and TiO­2 should be modified to minimize the hysteresis.

[Full Paper]
Bo Wu, Kunwu Fu, Natalia Yantara, Guichuan Xing, Shuangyong Sun, Tze Chien Sum, Nripan Mathews
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500829. Read article

A Comparative Study of the Effects of Nontoxic Chloride Treatments on CdTe Solar Cell Microstructure and Stoichiometry

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The effectiveness of various chlorides for activating CdTe solar cells is explored, in view of replacing the highly toxic CdCl2. It is shown that the chosen chloride must have a low dissociation energy (<4 eV) in order to catalyze the necessary metallurgical and stoichiometric changes. Significant insight into the Cl-activation mechanism is gained from the results.

[Full Paper]
Benjamin L. Williams, Jonathan D. Major, Leon Bowen, Wytze Keuning, Mariadriana Creatore, Ken Durose
Adv. Energy Mater., July 27, 2015, DOI: 10.1002/aenm.201500554. Read article

Significance of Average Domain Purity and Mixed Domains on the Photovoltaic Performance of High-Efficiency Solution-Processed Small-Molecule BHJ Solar Cells

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Resonant soft X-ray scattering reveals a correlation between average domain purity and device fill-factor for an efficient solution processed small molecule 7,7′-(4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b′]dithiophene-2,6-diyl)bis(6-fluoro-4-(5′-hexyl-[2,2′-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole):phenyl-C71-butyric acid methyl ester (p-DTS(FBTTh2)2:PC71BM) system. The results show the requirement of optimal combination of phase purities to diminish bimolecular as well as geminate recombination.

[Full Paper]
Subhrangsu Mukherjee, Christopher M. Proctor, Guillermo C. Bazan, Thuc-Quyen Nguyen, Harald Ade
Adv. Energy Mater., July 20, 2015, DOI: 10.1002/aenm.201500877. Read article

11.2% Efficient Solution Processed Kesterite Solar Cell with a Low Voltage Deficit

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An 11.2% efficient kesterite solar cell is fabricated with a open circuit voltage (Voc ) deficit of only 0.57 V, possible by employing the three-stage annealing process. The reduced Voc deficit goes along with an increased minority carrier lifetime, low diode saturation current, and ideality factor, which are signatures of the semiconductor material with a low concentration of recombination centers.

[Communication]
Stefan G. Haass, Matthias Diethelm, Melanie Werner, Benjamin Bissig, Yaroslav E. Romanyuk, Ayodhya N. Tiwari
Adv. Energy Mater., July 17, 2015, DOI: 10.1002/aenm.201500712. Read article

Carrier-Selectivity-Dependent Charge Recombination Dynamics in Organic Photovoltaic Cells with a Ferroelectric Blend Interlayer

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The carrier selectivity at charge collecting interfaces in organic solar cells is demonstrated through the utilization of ferroelectric–semiconductor blend interlayers. Transient electrical measurements reveal the elongated charge carrier lifetime within devices with highly charge-selective contacts, which is well correlated with the asymmetric development of charge carrier density profiles in the photo­active layers.

[Full Paper]
Sae Byeok Jo, Min Kim, Dong Hun Sin, Jaewon Lee, Heung Gyu Kim, Hyomin Ko, Kilwon Cho
Adv. Energy Mater., July 15, 2015, DOI: 10.1002/aenm.201500802. Read article

Synergistic Impact of Solvent and Polymer Additives on the Film Formation of Small Molecule Blend Films for Bulk Heterojunction Solar Cells

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In situ measurement shows that polystyrene (PS) and diiodooctane (DIO) additives promote donor crystallite formation synergistically, on different time scales and through different mechanisms. PS-rich films retain solvent, promoting phase separation early in the casting process. Meanwhile, the low vapor pressure of DIO extends the time scale of film evolution and allows for crystalline rearrangement of the donor phase after casting.

[Full Paper]
Caitlin McDowell, Maged Abdelsamie, Kui Zhao, Detlef-M. Smilgies, Guillermo C. Bazan, Aram Amassian
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201501121. Read article

Similar or Totally Different: the Adjustment of the Twist Conformation Through Minor Structural Modification, and Dramatically Improved Performance for Dye-Sensitized Solar Cell

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The sensitizer configuration of the acceptor and anchoring group affects electron injection and recombination in the corresponding dye-sensitized solar cells. The partial broken conjugation shows an efficient approach to enhancing photovoltaic performance after a systematical investigation of seven similar-looking sensitizers.

[Full Paper]
Zhaofei Chai, Mei Wu, Manman Fang, Sushu Wan, Ting Xu, Runli Tang, Yujun Xie, Anyi Mei, Hongwei Han, Qianqian Li, Zhen Li
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201500846. Read article

Control of Charge Dynamics via Use of Nonionic Phosphonate Chains and Their Effectiveness for Inverted Structure Solar Cells

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Nonionic phosphonate side chains are introduced into an isoindigo-based model polymer in order to induce a high compatibility at hybrid organic/inorganic interfaces, while controlling charge transport/collection and recombination dynamics in inverted polymer solar cells. This approach can bring ≈20% improvement in efficiency when compared to a nonmodified control analog.

[Full Paper]
Gyoungsik Kim, Seyeong Song, Jungho Lee, Taehyo Kim, Tack Ho Lee, Bright Walker, Jin Young Kim, Changduk Yang
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201500844. Read article

Cation Substitution of Solution-Processed Cu2ZnSnS4 Thin Film Solar Cell with over 9% Efficiency

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9.2%-efficiency Cu2ZnSnS4 (CZTS)-based pure sulfide thin film solar cells are fabricated by replacing partial Zn with Cd via low-cost sol–gel method. The appropriate incorporation of Cd into CZTS thin films can adjust band gaps, improve microstructure, and reduce the ZnS secondary phase in CZTS thin film, resulting in significant improvement of efficiencies.

[Full Paper]
Zhenghua Su, Joel Ming Rui Tan, Xianglin Li, Xin Zeng, Sudip Kumar Batabyal, Lydia Helena Wong
Adv. Energy Mater., July 14, 2015, DOI: 10.1002/aenm.201500682. Read article

High-Performance Semitransparent Perovskite Solar Cells with 10% Power Conversion Efficiency and 25% Average Visible Transmittance Based on Transparent CuSCN as the Hole-Transporting Material

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High-performance planar heterojunction perovskite (CH3NH3PbI3) solar cell (PVSC) is demonstrated by utilizing CuSCN as a hole-transporting layer. Efficient hole-transport and hole-extraction at the CuSCN/CH3NH3PbI3 interface facilitate the PVSCs to reach 16% power conversion efficiency (PCE). In addition, excellent transparency of CuSCN also enables high-performance semitransparent PVSC (10% PCE and 25% average visible transmittance) to be realized.

[Communication]
Jae Woong Jung, Chu-Chen Chueh, Alex K.-Y. Jen
Adv. Energy Mater., July 06, 2015, DOI: 10.1002/aenm.201500486. Read article

Highly Efficient Solution-Processed Poly(3,4-ethylenedio-xythiophene):Poly(styrenesulfonate)/Crystalline–Silicon Heterojunction Solar Cells with Improved Light-Induced Stability

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p-Toluenesulfonic acid/dimethyl sulfoxide (PTSA/DMSO)-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/crystalline-silicon (c-Si) hybrid solar cells with a solution-processed anti-reflection coating of TiO2 exhibit a record power conversion efficiency of 15.5%. Additionally, the performance stability of the hybrid device for both air storage and light exposure is improved due to removal of the PSS matrix from the PTSA/DMSO-treated PEDOT:PSS thin film.

[Communication]
Qiming Liu, Ryo Ishikawa, Shuji Funada, Tatsuya Ohki, Keiji Ueno, Hajime Shirai
Adv. Energy Mater., June 29, 2015, DOI: 10.1002/aenm.201500744. Read article

High-Performance Ta2O5/Al-Doped Ag Electrode for Resonant Light Harvesting in Efficient Organic Solar Cells

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A high-performance Ta2O5/Al-doped Ag electrode is presented by inserting a di­electric layer of Ta2O5 underneath ultrathin Al-doped Ag film. Such an Al-doped Ag can be as thin as 4 nm with excellent transparency. Fine light management by tuning the Ta2O5 thickness leads to enhancement of photocurrent and power conversion efficiency for the Ta2O5/Al-doped Ag-based organic solar cells due to the optical cavity effect, superior to their indium tin oxide counterparts.

[Full Paper]
Dewei Zhao, Cheng Zhang, Hyunsoo Kim, L. Jay Guo
Adv. Energy Mater., June 25, 2015, DOI: 10.1002/aenm.201500768. Read article

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