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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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Thin Film Solar Cell Based on ZnSnN2/SnO Heterojunction

Thin Film Solar Cell Based on ZnSnN2/SnO Heterojunction

An inorganic heterojunction solar cell is fabricated on ITO-glass with p-SnO and n- ZnSnN2 thin films. It is emphasized that the efficiency of solar cell is momentously influenced by selection of the metallic electrode. The phenomena of band bending, carrier transportation, electrical conduction, carrier collection/recombination, built-in voltage, and band offsets are precisely deliberated for ZnSnN2/SnO heterojunction via the energy band diagram.

[Rapid Research Letter]
Kashif Javaid, Jingjing Yu, Weihua Wu, Jun Wang, Hongliang Zhang, Junhua Gao, Fei Zhuge, Lingyan Liang, Hongtao Cao
Phys. Status Solidi RRL, November 17, 2017, https://doi.org/10.1002/pssr.201700332 Read article

Feasible D1–A–D2–A Random Copolymers for Simultaneous High-Performance Fullerene and Nonfullerene Solar Cells

Feasible D1–A–D2–A Random Copolymers for Simultaneous High‐Performance Fullerene and Nonfullerene Solar Cells

BDD-based four copolymers PBDD-TTn which contained BDT, TT, and BDD are synthesized and operated with two acceptors, PC71BM and m-ITIC. Two systems have different operating mechanisms, and simultaneously high-performances 8.44% for PC71BM and 11.18% for m-ITIC are obtained.

[Full Paper]
Mingyu Jeong, Shanshan Chen, Sang Myeon Lee, Zhiwei Wang, Yankang Yang, Zhi-Guo Zhang, Chunfeng Zhang, Min Xiao, Yongfang Li, Changduk Yang
Adv. Energy Mater., November 16, 2017, https://doi.org/10.1002/aenm.201702166 Read article

Proposition of an Environment Friendly Triple Junction Solar Cell Based on Earth Abundant CBTSSe/CZTS/ACZTSe Materials

Proposition of an Environment Friendly Triple Junction Solar Cell Based on Earth Abundant CBTSSe/CZTS/ACZTSe Materials

An ecofriendly triple junction CBTSSe/CZTS/ACZTSe solar cell has been designed using earth abundant CBTSSe, CZTS, and ACZTSe materials as the primary absorbing layers for top, middle, and bottom cells, respectively. The maximum obtainable efficiency is calculated to be 36.04% at 250 nm CBTSSe, 300 nm CZTS, and 1000 nm ACZTSe.

[Rapid Research Letter]
Uday Saha, Md. Kawsar Alam
Phys. Status Solidi RRL, November 15, 2017, https://doi.org/10.1002/pssr.201700335 Read article

Lead- and Iodide-Deficient (CH3NH3)PbI3 (d-MAPI): The Bridge between 2D and 3D Hybrid Perovskites

Lead‐ and Iodide‐Deficient (CH3NH3)PbI3 (d‐MAPI): The Bridge between 2D and 3D Hybrid Perovskites

Back on the MAPI: A family of hybrid perovskites (d-MAPI) is presented. Association of PbI2 with methylammonium (MA+) and hydroxyethylammonium (HEA+) cations leads to five compounds with the general formula (MA)1−2.48x(HEA)3.48x[Pb1−xI3−x]. These materials, which can be prepared as thin films, are lead- and iodide-deficient compared to (CH3NH3)PbI3 (MAPI). Keeping a 3D architecture, they are a bridge between 2D hybrid perovskites and MAPI.

[Communication]
Antonin Leblanc, Nicolas Mercier, Magali Allain, Jens Dittmer, Vincent Fernandez, Thierry Pauporté
Angew. Chem. Int. Ed., November 15, 2017, https://doi.org/10.1002/anie.201710021 Read article

A Reusable N-Doped-Carbon-Coated Mo2C Composite Counter Electrode for High-Efficiency Dye-Sensitized Solar Cells

A Reusable N‐Doped‐Carbon‐Coated Mo2C Composite Counter Electrode for High‐Efficiency Dye‐Sensitized Solar Cells

Pt-free electrode material: A polyoxometalate and dicyandiamide have been heated at high temperature to obtain highly dispersed Mo2C nanoparticles. The obtained material can serve as an alternative to Pt to assemble a reusable counter electrode for high-efficiency dye-sensitized solar cells (see figure).

[Full Paper]
Ting Wang, Jiabo Wang, Weilin Chen, Xiaotao Zheng, Enbo Wang
Chem. Eur. J., November 14, 2017, https://doi.org/10.1002/chem.201703519 Read article

Highly Efficient Porphyrin-Based OPV/Perovskite Hybrid Solar Cells with Extended Photoresponse and High Fill Factor

Highly Efficient Porphyrin‐Based OPV/Perovskite Hybrid Solar Cells with Extended Photoresponse and High Fill Factor

A highly efficient organic photovoltaics/perovskite hybrid solar cell is demonstrated by blending a new conjugated porphyrin-based small molecule with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) to function as an efficient bulk-heterojunction layer. The extended photoresponse, matched energy levels, and high hole mobility derived from the optimized bulk-heterojunction morphology contribute to the record-high efficiency of 19.02% in these hybrid devices.

[Communication]
Ke Gao, Zonglong Zhu, Bo Xu, Sae Byeok Jo, Yuanyuan Kan, Xiaobin Peng, Alex K.-Y. Jen
Adv. Mater., November 13, 2017, https://doi.org/10.1002/adma.201703980 Read article

Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells

Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells

Flexible and thin single-walled carbon nanotube (SWNT)/Si solar cells are fabricated using scalable and room-temperature processes. They present a high power conversion efficiency of 7.5% without any light-trapping structure. Transient absorption spectroscopy shows a significant charge generation and injection of excited charge carriers from SWNTs to Si that can be smoothly tuned by the amount of nanotube films.

[Full Paper]
Xiaokai Li, Marina Mariano, Lyndsey McMillon-Brown, Jing-Shun Huang, Matthew Y. Sfeir, Mark A. Reed, Yeonwoong Jung, André D. Taylor
Small, November 10, 2017, https://doi.org/10.1002/smll.201702387 Read article

Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption

Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption

Fullerene-free ternary polymer solar cells with a high efficiency of 12.16% are fabricated by adding a novel small-molecule acceptor to form a cascaded energy-level structure.

[Communication]
Weigang Jiang, Runnan Yu, Zhiyang Liu, Ruixiang Peng, Dongbo Mi, Ling Hong, Qiang Wei, Jianhui Hou, Yongbo Kuang, Ziyi Ge
Adv. Mater., November 10, 2017, https://doi.org/10.1002/adma.201703005 Read article

A Shockley-Type Polymer: Fullerene Solar Cell

A Shockley‐Type Polymer: Fullerene Solar Cell

Strongly suppressed recombination is observed in a polymer:fullerene system resulting in solar cell power conversion efficiencies as high as 9% at a junction thickness of 800 nm. Results indicate that solar cell devices made of this material system with thicknesses as large as 300 nm can exhibit Shockley-type behavior, i.e., the fill factor is unaffected by bimolecular recombination.

[Full Paper]
Ardalan Armin, Zhiming Chen, Yaocheng Jin, Kai Zhang, Fei Huang, Safa Shoaee
Adv. Energy Mater., November 08, 2017, https://doi.org/10.1002/aenm.201701450 Read article

Luminescent Spectral Conversion to Improve the Performance of Dye-Sensitized Solar Cells

Luminescent Spectral Conversion to Improve the Performance of Dye‐Sensitized Solar Cells

Architectural design of DSSCs for spectral conversion: Spectral conversion is a promising strategy for improving the light-harvesting efficiency in dye-sensitized solar cells (DSSCs). This Review aims to cover all possible architectural designs of DSSC including spectral converters. Each configuration is discussed in detail and important parameters governing the spectral conversion mechanism are introduced.

[Review]
Zahra Hosseini, Nima Taghavinia, Eric Wei-Guang Diau
ChemPhysChem, November 07, 2017, https://doi.org/10.1002/cphc.201700920 Read article

Interface Engineering for Highly Efficient and Stable Planar p-i-n Perovskite Solar Cells

Interface Engineering for Highly Efficient and Stable Planar p‐i‐n Perovskite Solar Cells

Interface engineering has been widely practiced on planar p-i-n perovskite solar cells since it brings about significant improvement in both device performance and stability. Recent progress is reviewed about the engineering of each interface of such devices and its effects, including defect passivation, accelerated charge transfer, enhanced stabilities, etc., which are key parameters for the photovoltaic devices.

[Review]
Yang Bai, Xiangyue Meng, Shihe Yang
Adv. Energy Mater., November 07, 2017, https://doi.org/10.1002/aenm.201701883 Read article

All-Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane-Functionalized Side Chains with Efficiency over 10%

All‐Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane‐Functionalized Side Chains with Efficiency over 10%

A novel wide-bandgap conjugated copolymer PTzBI-Si based on an imide-functionalized benzotriazole unit containing a siloxane-terminated side-chain is developed and used to fabricate all-polymer solar cells (all-PSCs). When processed with a green-solvent 2-methyl-tetrahydrofuran, the all-PSC exhibits a power conversion efficiency of 10.1%, which represents the highest efficiency ever reported for all-PSCs.

[Communication]
Baobing Fan, Lei Ying, Peng Zhu, Feilong Pan, Feng Liu, Junwu Chen, Fei Huang, Yong Cao
Adv. Mater., November 07, 2017, https://doi.org/10.1002/adma.201703906 Read article

Perovskite Solar Cells with ZnO Electron-Transporting Materials

Perovskite Solar Cells with ZnO Electron‐Transporting Materials

Progress in perovskite solar cells based on ZnO electron-transport materials of different morphologies and their fabrication methods is summarized. The influence of the ZnO morphology and fabrication process on the performance of perovskite solar cells are reviewed and highlighted. Moreover, the issues of ZnO materials, and some solutions and strategies to promote the performance of solar cells, are introduced.

[Progress Report]
Peng Zhang, Jiang Wu, Ting Zhang, Yafei Wang, Detao Liu, Hao Chen, Long Ji, Chunhua Liu, Waseem Ahmad, Zhi David Chen, Shibin Li
Adv. Mater., November 06, 2017, https://doi.org/10.1002/adma.201703737 Read article

Efficiency Enhancement of Single-Walled Carbon Nanotube-Silicon Heterojunction Solar Cells Using Microwave-Exfoliated Few-Layer Black Phosphorus

Efficiency Enhancement of Single‐Walled Carbon Nanotube‐Silicon Heterojunction Solar Cells Using Microwave‐Exfoliated Few‐Layer Black Phosphorus

Few-layer black phosphorus sheets are prepared using a microwave-assisted liquid-phase exfoliation method and introduced into high efficiency single-walled carbon nanotube-silicon heterojunction solar cells.

[Full Paper]
Munkhjargal Bat-Erdene, Munkhbayar Batmunkh, Sherif Abdulkader Tawfik, Marco Fronzi, Michael J. Ford, Cameron J. Shearer, LePing Yu, Mahnaz Dadkhah, Jason R. Gascooke, Christopher T. Gibson, Joseph G. Shapter
Adv. Funct. Mater., November 02, 2017, https://doi.org/10.1002/adfm.201704488 Read article

Correlated In Situ Low-Frequency Noise and Impedance Spectroscopy Reveal Recombination Dynamics in Organic Solar Cells Using Fullerene and Non-Fullerene Acceptors

Correlated In Situ Low‐Frequency Noise and Impedance Spectroscopy Reveal Recombination Dynamics in Organic Solar Cells Using Fullerene and Non‐Fullerene Acceptors

Low-frequency electronic noise is measured in polymer solar cells with fullerene and non-fullerene acceptors. Charge carrier lifetimes deduced from impedance spectroscopy enable the noise data to be fit to the Kleinpenning model. The results establish that low-frequency noise elucidates charge recombination processes that limit power conversion efficiency. This correlated analytical tool provides quantitative guidance to the optimization of emerging photovoltaic materials.

[Full Paper]
Kyle A. Luck, Vinod K. Sangwan, Patrick E. Hartnett, Heather N. Arnold, Michael R. Wasielewski, Tobin J. Marks, Mark C. Hersam
Adv. Funct. Mater., November 02, 2017, https://doi.org/10.1002/adfm.201703805 Read article

PtCoFe Nanowire Cathodes Boost Short-Circuit Currents of Ru(II)-Based Dye-Sensitized Solar Cells to a Power Conversion Efficiency of 12.29%

PtCoFe Nanowire Cathodes Boost Short‐Circuit Currents of Ru(II)‐Based Dye‐Sensitized Solar Cells to a Power Conversion Efficiency of 12.29%

PtCoFe nanowires with rich (111) planes are chemically prepared and act as the counter electrodes of dye-sensitized solar cells (DSSCs). Evidently, Pt49Co23Fe28 nanowires demonstrate the superior catalytic properties with respect to the I/inline image redox reactions. Thus, PRT-22 DSSC based on Pt49Co23Fe28 nanowire produces an impressive power conversion efficiency of 12.29%.

[Full Paper]
Chin-Cheng (Paul) Chiang, Chang-Yu Hung, Shang-Wei Chou, Jing-Jong Shyue, Kum-Yi Cheng, Pei-Jen Chang, Ya-Yun Yang, Ching-Yen Lin, Ting-Kuang Chang, Yun Chi, Hung-Lung Chou, Pi-Tai Chou
Adv. Funct. Mater., November 02, 2017, https://doi.org/10.1002/adfm.201703282 Read article

Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor-Based Copolymers

Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor–Acceptor‐Based Copolymers

A classical benzothiadiazole acceptor unit is introduced to replace a thiophene unit in polymer backbone of P1 to achieve P2. P2 exhibits a power conversion efficiency of 6.60%, which is higher than that of P1, indicating that incorporating an additional electron-withdrawing unit to a traditional donor–acceptor (D–A) polymer is a promising synthetic strategy for developing high-performance photo­voltaic polymers.

[Communication]
Zongbo Li, Kangkang Weng, Aihua Chen, Xiaobo Sun, Donghui Wei, Mingming Yu, Lijun Huo, Yanming Sun
Macromol. Rapid Commun., October 25, 2017, https://doi.org/10.1002/marc.201700547 Read article

Recent Advances in Spiro-MeOTAD Hole Transport Material and Its Applications in Organic–Inorganic Halide Perovskite Solar Cells

Recent Advances in Spiro‐MeOTAD Hole Transport Material and Its Applications in Organic–Inorganic Halide Perovskite Solar Cells

Spiro-MeOTAD is the most commonly used hole transport material for perovskite solar cells. In this article, various aspects of spiro-MeOTAD including its properties, additives, stability, alternatives, its applications in perovskite solar cells as well as other applications are reviewed.

[Review]
Zafer Hawash, Luis K. Ono, Yabing Qi
Adv. Mater. Interfaces, October 25, 2017, https://doi.org/10.1002/admi.201700623 Read article

A New Polymer Electron Acceptor Based on Thiophene-S,S-dioxide Unit for Organic Photovoltaics

A New Polymer Electron Acceptor Based on Thiophene‐S,S‐dioxide Unit for Organic Photovoltaics

Replacement of the thiophene unit with thiophene-S,S-dioxide unit in the conjugated polymer backbone leads to downshift of lowest unoccupied molecular orbital/highest occupied molecular orbital energy levels by 0.91 eV/0.42 eV, respectively, and consequently transforms a typical polymer electron donor to electron acceptor.

[Communication]
Bin Meng, Junhui Miao, Jun Liu, Lixiang Wang
Macromol. Rapid Commun., October 24, 2017, https://doi.org/10.1002/marc.201700505 Read article

Aqueous PCDTBT:PC71BM Photovoltaic Inks Made by Nanoprecipitation

Aqueous PCDTBT:PC71BM Photovoltaic Inks Made by Nanoprecipitation

PCDTBT:PC71BM composite particles are prepared in water by a postpolymerization process, the nanoprecipitation. The particle size is tuned by playing with different parameters and are used to create the active layer of organic photovoltaic cells by spray-coating. After optimized annealing temperature, the impact of the active layer's composition on the efficiency of solar cells is studied.

[Communication]
Geoffrey Prunet, Laurie Parrenin, Eleni Pavlopoulou, Gilles Pecastaings, Cyril Brochon, Georges Hadziioannou, Eric Cloutet
Macromol. Rapid Commun., October 24, 2017, https://doi.org/10.1002/marc.201700504 Read article

EuIII-Based Nanolayers as Highly Efficient Downshifters for CIGS Solar Cells

EuIII‐Based Nanolayers as Highly Efficient Downshifters for CIGS Solar Cells

Thirteen europium β-diketonate complexes have been investigated as photonic converters to shift the UV photons of the solar spectrum towards red emission, consequently increasing the external quantum efficiency of CIGS solar cells in the 280–420 nm region.

[Full Paper]
Anatolie Gavriluta, Thomas Fix, Aline Nonat, Abdelilah Slaoui, Jean-François Guillemoles, Loïc J. Charbonnière
Eur. J. Inorg. Chem., October 24, 2017, https://doi.org/10.1002/ejic.201701112 Read article

Fuel Production from Seawater and Fuel Cells Using Seawater

Fuel Production from Seawater and Fuel Cells Using Seawater

Only the sea makes sense: Seawater is the most abundant resource on our planet and fuel production from seawater has the notable advantage that it would not compete with growing demands for pure water. Electrolysis of seawater under appropriate conditions affords hydrogen and dioxygen with 100 % faradaic efficiency without oxidation of chloride. This Review concerns the production of fuels from seawater and their direct use in fuel cells.

[Review]
Shunichi Fukuzumi, Yong-Min Lee, Wonwoo Nam
ChemSusChem, October 24, 2017, https://doi.org/10.1002/cssc.201701381 Read article

p-Type CuI Islands on TiO2 Electron Transport Layer for a Highly Efficient Planar-Perovskite Solar Cell with Negligible Hysteresis

p‐Type CuI Islands on TiO2 Electron Transport Layer for a Highly Efficient Planar‐Perovskite Solar Cell with Negligible Hysteresis

It is revealed that the CuI islands on the TiO2 electron transport layer can induce change of polarity increasing electron extraction, establish barrier-free band alignment with perovskite, and reduce the trap sites. These changes of interface properties induce power conversion efficiency of 19.0% perovskite solar cell with negligible hysteresis.

[Communication]
Mahdi Malekshahi Byranvand, Taewan Kim, Seulki Song, Gyeongho Kang, Seung Un Ryu, Taiho Park
Adv. Energy Mater., October 16, 2017, https://doi.org/10.1002/aenm.201702235 Read article

Efficient Solar Cells Based on Light-Harvesting Antimony Sulfoiodide

Efficient Solar Cells Based on Light‐Harvesting Antimony Sulfoiodide

Solar cells with the configuration of FTO (fluorine-doped SnO2)/TiO2 blocking layer/mesoporous TiO2/SbSI/hole-transporting material/Au are demonstrated for the first time. The cells fabricated using TiO2 as an electron-transporting layer and poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] as a hole-transporting layer exhibit a power conversion efficiency of 3.05% under full illumination of air mass 1.5G.

[Communication]
Riming Nie, Hyun-sung Yun, Min-Jae Paik, Aarti Mehta, Byung-wook Park, Yong Chan Choi, Sang Il Seok
Adv. Energy Mater., October 16, 2017, https://doi.org/10.1002/aenm.201701901 Read article

High-Efficiency Low-Temperature ZnO Based Perovskite Solar Cells Based on Highly Polar, Nonwetting Self-Assembled Molecular Layers

High‐Efficiency Low‐Temperature ZnO Based Perovskite Solar Cells Based on Highly Polar, Nonwetting Self‐Assembled Molecular Layers

Low-temperature planar perovskite solar cells with efficiency of 18.82% are developed via a strategy that combines dual-functional self-assembled monolayer (SAM) modification of ZnO electron accepting layers with sequential deposition of perovskite active layers. The SAMs, constructed from newly synthesized molecules with high dipole moments, act both as excellent surface wetting control layers and as electric dipole layers for ZnO layers.

[Full Paper]
Randi Azmi, Wisnu Tantyo Hadmojo, Septy Sinaga, Chang-Lyoul Lee, Sung Cheol Yoon, In Hwan Jung, Sung-Yeon Jang
Adv. Energy Mater., October 16, 2017, https://doi.org/10.1002/aenm.201701683 Read article

Impact of the Catalytic System on the Formation of Structural Defects for the Synthesis of Well-Defined Donor–Acceptor Semiconducting Polymers

Impact of the Catalytic System on the Formation of Structural Defects for the Synthesis of Well‐Defined Donor–Acceptor Semiconducting Polymers

The influence of the catalytic system in the formation of structural defects within the donor–acceptor macromolecular chain, in the molecular characteristics, and in the ratio of the two monomers is achieved through the utilization of size exclusion chromatography and proton nuclear magnetic resonance (1H-NMR), respectively, by studying a series of alternating polymers consisting of indacenodithiophene and quinoxaline moieties.

[Full Paper]
Michael Spanos, Vasilis G. Gregoriou, Apostolos Avgeropoulos, Christos L. Chochos
Macromol. Chem. Phys., October 12, 2017, https://doi.org/10.1002/macp.201700283 Read article

Black Phosphorus: Synthesis and Application for Solar Cells

Black Phosphorus: Synthesis and Application for Solar Cells

Few-layer phosphorus, often called phosphorene, is the most recent addition to the family of 2D nanomaterials. The material has several interesting properties including a tunable bandgap, high carrier mobility, and ambipolar conductivity. This article explores the current state of synthesis of few-layer black phosphorus derivatives and their successful application in various emerging solar cells.

[Research News]
Munkhbayar Batmunkh, Munkhjargal Bat-Erdene, Joseph G. Shapter
Adv. Energy Mater., October 11, 2017, https://doi.org/10.1002/aenm.201701832 Read article

Charge Generation and Recombination in an Organic Solar Cell with Low Energetic Offsets

Charge Generation and Recombination in an Organic Solar Cell with Low Energetic Offsets

To realize organic photovoltaics with high open-circuit voltages and short-circuit currents, it is necessary to minimize energetic offsets between donor and acceptor semiconductors. This article describes a comprehensive study on charge recombination and generation in a system with very low energetic offsets yet relatively high performance, in order to identify the root cause for the limited fill factor.

[Full Paper]
Niva A. Ran, John A. Love, Michael C. Heiber, Xuechen Jiao, Michael P. Hughes, Akchheta Karki, Ming Wang, Viktor V. Brus, Hengbin Wang, Dieter Neher, Harald Ade, Guillermo C. Bazan, Thuc-Quyen Nguyen
Adv. Energy Mater., October 11, 2017, https://doi.org/10.1002/aenm.201701073 Read article

Inorganic CsPbI3 Perovskite Coating on PbS Quantum Dot for Highly Efficient and Stable Infrared Light Converting Solar Cells

Inorganic CsPbI3 Perovskite Coating on PbS Quantum Dot for Highly Efficient and Stable Infrared Light Converting Solar Cells

Inorganic CsPbI3 perovskite is epitaxially grown on the PbS colloidal quantum dot at a low temperature. Increased depletion width, lower trap density, reduced charge recombination, and enhanced built-in electric field within the solar cell are obtained by using the CsPbI3-perovskited coated PbS colloidal quantum dot as a light absorbing material in the solar cell, resulting in high performance.

[Full Paper]
Xiaoliang Zhang, Jindan Zhang, Dibya Phuyal, Juan Du, Lei Tian, Viktor A. Öberg, Malin B. Johansson, Ute B. Cappel, Olof Karis, Jianhua Liu, Håkan Rensmo, Gerrit Boschloo, Erik M. J. Johansson
Adv. Energy Mater., October 10, 2017, https://doi.org/10.1002/aenm.201702049 Read article

A Facile Method to Fine-Tune Polymer Aggregation Properties and Blend Morphology of Polymer Solar Cells Using Donor Polymers with Randomly Distributed Alkyl Chains

A Facile Method to Fine‐Tune Polymer Aggregation Properties and Blend Morphology of Polymer Solar Cells Using Donor Polymers with Randomly Distributed Alkyl Chains

The structural and electronic properties of random polymers comprising a mixture of commercially available alkyl chains can be systematically tuned and a power conversion efficiency up to 11.1% can be achieved, which is one of the highest values to date for polymer:fullerene solar cells. These random polymers are easier to scale up compared to that obtained using odd-numbered alkyl chains.

[Communication]
Huatong Yao, Yunke Li, Huawei Hu, Philip C. Y. Chow, Shangshang Chen, Jingbo Zhao, Zhengke Li, Joshua H. Carpenter, Joshua Yuk Lin Lai, Guofang Yang, Yuhang Liu, Haoran Lin, Harald Ade, He Yan
Adv. Energy Mater., October 10, 2017, https://doi.org/10.1002/aenm.201701895 Read article

High-Performance Wide Bandgap Copolymers Using an EDOT Modified Benzodithiophene Donor Block with 10.11% Efficiency

High‐Performance Wide Bandgap Copolymers Using an EDOT Modified Benzodithiophene Donor Block with 10.11% Efficiency

Combination of fluorination and side chain engineering strategies, newly developed benzo[1,2-b:4,5-b′]dithiophene block with 3,4-ethylenedioxythiophene side chains is first employed to build the efficient large bandgap copolymers with efficiency of 10.11%.

[Communication]
Kui Feng, Guofang Yang, Xiaopeng Xu, Guangjun Zhang, He Yan, Omar Awartani, Long Ye, Harald Ade, Ying Li, Qiang Peng
Adv. Energy Mater., October 10, 2017, https://doi.org/10.1002/aenm.201602773 Read article

Electrical Heating-Assisted Multiple Coating Method for Fabrication of High-Performance Perovskite Fiber Solar Cells by Thickness Control

Electrical Heating‐Assisted Multiple Coating Method for Fabrication of High‐Performance Perovskite Fiber Solar Cells by Thickness Control

A fast and effective method, electrical-heating assisted multiple coating, for producing high efficiency perovskite fiber solar cells is developed. Continuous deposition and hot coating improve perovskite coverage effectively. Film forming mechanism is clarified and protocols are optimized thereby achieving high coverage perovskite. Structure of a high efficiency device is clarified. Hence, high efficiency devices are fabricated reproducibly.

[Full Paper]
Buxin Chen, Si Chen, Bin Dong, Xue Gao, Xinyu Xiao, Jingbo Zhou, Jing Hu, Sheng Tang, Kai Yan, Hsienwei Hu, Keyi Sun, Wen Wen, Zhan Zhao, Dechun Zou
Adv. Mater. Interfaces, October 10, 2017, https://doi.org/10.1002/admi.201700833 Read article

Extrinsic Movable Ions in MAPbI3 Modulate Energy Band Alignment in Perovskite Solar Cells

Extrinsic Movable Ions in MAPbI3 Modulate Energy Band Alignment in Perovskite Solar Cells

This work highlights the positive effect of selective ionic doping in CH3NH3PbI3, which benefits for the energy band alignment and perovskite solar cell performances.

[Full Paper]
Jing Zhang, Renjie Chen, Yongzhen Wu, Minghui Shang, Zhaobing Zeng, Ying Zhang, Yuejin Zhu, Liyuan Han
Adv. Energy Mater., October 04, 2017, https://doi.org/10.1002/aenm.201701981 Read article

Complex Interplay between Absorber Composition and Alkali Doping in High-Efficiency Kesterite Solar Cells

Complex Interplay between Absorber Composition and Alkali Doping in High‐Efficiency Kesterite Solar Cells

Treatment with different alkali elements necessitates tuning absorber composition and specifically Sn content for achieving maximum performance of kesterite thin film solar cells. A ranking of alkali for best device performances is in the order of Li > Na > K > Rb > Cs, whereby an efficiency of 11.5% (total cell area) is achieved for a Li-doped champion device.

[Full Paper]
Stefan G. Haass, Christian Andres, Renato Figi, Claudia Schreiner, Melanie Bürki, Yaroslav E. Romanyuk, Ayodhya N. Tiwari
Adv. Energy Mater., October 04, 2017, https://doi.org/10.1002/aenm.201701760 Read article

Influence of Donor Polymer on the Molecular Ordering of Small Molecular Acceptors in Nonfullerene Polymer Solar Cells

Influence of Donor Polymer on the Molecular Ordering of Small Molecular Acceptors in Nonfullerene Polymer Solar Cells

Morphological analysis reveals influence of the donor polymer on the structural/electronic properties of small molecular acceptor and the overall blend morphology. A direct correlation is found between the (010) coherence length of small molecular acceptor with device fill-factor and photocurrent density, which is in good agreement with the parameters reported for state-of-art high-efficiency nonfullerene polymer solar cells.

[Full Paper]
Huawei Hu, Kui Jiang, Philip C. Y. Chow, Long Ye, Guangye Zhang, Zhengke Li, Joshua H. Carpenter, Harald Ade, He Yan
Adv. Energy Mater., October 04, 2017, https://doi.org/10.1002/aenm.201701674 Read article

Toward High Efficiency Polymer Solar Cells: Rearranging the Backbone Units into a Readily Accessible Random Tetrapolymer

Toward High Efficiency Polymer Solar Cells: Rearranging the Backbone Units into a Readily Accessible Random Tetrapolymer

Two conjugated polymers are synthesized using the same components in different sequences, regioregular and random. Readily synthesized with only two monomers, detailed structure analyses indicate that the random polymer 2TRA contains three distinct donor segments in its “tetrapolymer” backbone, granting a favorable morphology, higher hole-mobility, and better photovoltaic performance in blends with PC71BM than its regioregular analog (2TRR).

[Full Paper]
Cheng Zhou, Zhiming Chen, Guichuan Zhang, Caitlin McDowell, Peng Luo, Xiaoe Jia, Michael J. Ford, Ming Wang, Guillermo C. Bazan, Fei Huang, Yong Cao
Adv. Energy Mater., October 04, 2017, https://doi.org/10.1002/aenm.201701668 Read article

Antimony (V) Complex Halides: Lead-Free Perovskite-Like Materials for Hybrid Solar Cells

Antimony (V) Complex Halides: Lead‐Free Perovskite‐Like Materials for Hybrid Solar Cells

Planar junction solar cells based on the complex antimony (V) bromide (N-EtPy)[SbBr6] reveal external quantum efficiency of ≈80% and power conversion efficiency of ≈4%. The discovery of the first perovskite-like compound ABX6 exhibiting good photovoltaic performance opens wide opportunities for rational design of novel hybrid semiconductor materials for advanced electronic and photovoltaic applications.

[Communication]
Sergey A. Adonin, Lyubov A. Frolova, Maxim N. Sokolov, Gennady V. Shilov, Denis V. Korchagin, Vladimir P. Fedin, Sergey M. Aldoshin, Keith J. Stevenson, Pavel A. Troshin
Adv. Energy Mater., October 04, 2017, https://doi.org/10.1002/aenm.201701140 Read article

Substitutional Growth of Methylammonium Lead Iodide Perovskites in Alcohols

Substitutional Growth of Methylammonium Lead Iodide Perovskites in Alcohols

A substitutional growth method is introduced herein for the first time as a solution-phase technique, which produces tetragonally single-phased and metallic-lead-free methylammonium lead iodide perovskite crystals. In this approach, alcohols as polar protic solvents are found to catalyze the growth and nucleation of these high-symmetry crystals by facilitating large-scale and low-cost manufacturing for perovskite optoelectronics.

[Full Paper]
Muge Acik, Todd M. Alam, Fangmin Guo, Yang Ren, Byeongdu Lee, Richard A. Rosenberg, John F. Mitchell, In Kee Park, Geunsik Lee, Seth B. Darling
Adv. Energy Mater., September 29, 2017, https://doi.org/10.1002/aenm.201701726 Read article

From Recombination Dynamics to Device Performance: Quantifying the Efficiency of Exciton Dissociation, Charge Separation, and Extraction in Bulk Heterojunction Solar Cells with Fluorine-Substituted Polymer Donors

From Recombination Dynamics to Device Performance: Quantifying the Efficiency of Exciton Dissociation, Charge Separation, and Extraction in Bulk Heterojunction Solar Cells with Fluorine‐Substituted Polymer Donors

The individual efficiencies and losses associated with each step of photocurrent generation in PBDT[2X]T:PC71BM solar cells are determined using a combination of advanced transient spectroscopic, charge extraction, and steady-state spectroscopic techniques, aiding the development of a fuller understanding of the complex interplay between chemical structure, thin film processing conditions, and their impact on device performance.

[Full Paper]
Julien Gorenflot, Andreas Paulke, Fortunato Piersimoni, Jannic Wolf, Zhipeng Kan, Federico Cruciani, Abdulrahman El Labban, Dieter Neher, Pierre M. Beaujuge, Frédéric Laquai
Adv. Energy Mater., September 28, 2017, https://doi.org/10.1002/aenm.201701678 Read article

Semiconducting Metal Oxide Nanostructures for Water Splitting and Photovoltaics

Semiconducting Metal Oxide Nanostructures for Water Splitting and Photovoltaics

Earth abundant and environmentally friendly metal oxide semiconducting nanostructures are ideal candidates for the development of a solid platform in renewable energies, including energy conversion through solar cells and energy storage in solar fuels and electrochemical water splitting. The latest advancements in the field are presented and discussed in this review.

[Review]
Isabella Concina, Zafar Hussain Ibupoto, Alberto Vomiero
Adv. Energy Mater., September 26, 2017, https://doi.org/10.1002/aenm.201700706 Read article

Achieving High Open-Circuit Voltages up to 1.57 V in Hole-Transport-Material-Free MAPbBr3 Solar Cells with Carbon Electrodes

Achieving High Open‐Circuit Voltages up to 1.57 V in Hole‐Transport‐Material‐Free MAPbBr3 Solar Cells with Carbon Electrodes

An open-circuit voltage (Voc) of 1.57 V under AM1.5 sunlight is obtained in hole-transport-materials-free planar MAPbBr3 solar cells with carbon (graphite) electrodes. Compared to the large band offset between MAPbBr3 and graphite, a small (≤0.43 V) voltage loss across the MAPbBr3/graphite interface is measured. The band-edge electroluminescence from MAPbBr3 devices supports no back transfer of electrons across the MAPbBr3/TiO2 interface.

[Communication]
Yongqi Liang, Yajuan Wang, Cheng Mu, Sen Wang, Xinnan Wang, Dongsheng Xu, Licheng Sun
Adv. Energy Mater., September 25, 2017, https://doi.org/10.1002/aenm.201701159 Read article

Chalcogen-Atom-Annulated Perylene Diimide Trimers for Highly Efficient Nonfullerene Polymer Solar Cells

Chalcogen‐Atom‐Annulated Perylene Diimide Trimers for Highly Efficient Nonfullerene Polymer Solar Cells

Two novel perylene diimide trimers annulated with different chalcogen atoms, TriPDI-S and TriPDI-Se, are synthesized for highly efficient nonfullerene polymer solar cells. TriPDI-Se devices show a higher power conversion efficiency of 8.82% than that of TriPDI-S devices (7.86%), which can be attributed to its stronger absorption, higher crystallinity, and larger charge carrier mobility.

[Communication]
Yuwei Duan, Xiaopeng Xu, Ying Li, Zuojia Li, Qiang Peng
Macromol. Rapid Commun., September 15, 2017, https://doi.org/10.1002/marc.201700405 Read article

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