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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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Recent Articles

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Synthesis, Crystal Structures and Photosensitizing Activities of Ni(II) and Pd(II) Heteroleptic Dithiolate–dppf Complexes

Synthesis, Crystal Structures and Photosensitizing Activities of Ni(II) and Pd(II) Heteroleptic Dithiolate–dppf Complexes

Three new heteroleptic [M(dithiolate-dppf)] (M=Ni(II), Pd(II)) complexes have been synthesized, fully characterized and explored as sensitizers in TiO2 dye sensitized solar cells. The nickel complex 1 withη=0.78% has shown promising light to electrical energy conversion efficiency.

[Full Paper]
Krishna K. Manar, Ajit N. Gupta, Arun K. Gupta, Lal B. Prasad, Pankaj Srivastava, Michael G. B. Drew, Nanhai Singh
ChemistrySelect, March 24, 2017, https://doi.org/10.1002/slct.201700367 Read article

High-Performance Nonfullerene Polymer Solar Cells based on Imide-Functionalized Wide-Bandgap Polymers

High‐Performance Nonfullerene Polymer Solar Cells based on Imide‐Functionalized Wide‐Bandgap Polymers

High-performance nonfullerene polymer solar cells with power conversion efficiencies of around 10% are achieved by integrating the wide-bandgap polymers PTzBI or PTzBI-DT with a nonfullerene acceptor ITIC. The extension of conjugation can affect the optical and electronic properties, molecular aggregation properties, and charge separation in the bulk-heterojunction films, and thus the overall photovoltaic performances.

[Communication]
Baobing Fan, Kai Zhang, Xiao-Fang Jiang, Lei Ying, Fei Huang, Yong Cao
Adv. Mater., March 23, 2017, https://doi.org/10.1002/adma.201606396 Read article

Energy-Autonomous, Flexible, and Transparent Tactile Skin

Energy‐Autonomous, Flexible, and Transparent Tactile Skin

Single-layer-graphene-based, coplanar, interdigitated capacitive touch sensors are used in this work as building blocks for a transparent, flexible, and energy-autonomous tactile skin.

[Full Paper]
Carlos García Núñez, William Taube Navaraj, Emre O. Polat, Ravinder Dahiya
Adv. Funct. Mater., March 22, 2017, https://doi.org/10.1002/adfm.201606287 Read article

Synthesis and Characterization of a Soluble A–D–A Molecule Containing a 2D Conjugated Selenophene-Based Side Group for Organic Solar Cells

Synthesis and Characterization of a Soluble A–D–A Molecule Containing a 2D Conjugated Selenophene‐Based Side Group for Organic Solar Cells

The synthesis and characterization of a new A–D–A-type molecule (SeBDTDPP) containing a conjugated two-dimensional benzodithiophene donor is reported.

[Communication]
Yurim Shin, Chang Eun Song, Woo-Hyung Lee, Sang Kyu Lee, Won Suk Shin, In-Nam Kang
Macromol. Rapid Commun., March 21, 2017, https://doi.org/10.1002/marc.201700016 Read article

Solar Cell Materials by Design: Hybrid Pyroxene Corner-Sharing VO4 Tetrahedral Chains

Solar Cell Materials by Design: Hybrid Pyroxene Corner‐Sharing VO4 Tetrahedral Chains

A chain for the better: A new class of materials for photovoltaic applications has been developed, based on low-dimensional hybrid vanadate pyroxenes [A]VO3 (with molecular cations [A] and corner-sharing VO4 tetrahedral chains). These materials were found to satisfy the physical requirements needed to develop an efficient solar cell (a band gap of 1.0–1.7 eV, strong light absorption and good electron-transport properties).

[Full Paper]
Fedwa El-Mellouhi, Akinlolu Akande, Carlo Motta, Sergey N. Rashkeev, Golibjon Berdiyorov, Mohamed El-Amine Madjet, Asma Marzouk, El Tayeb Bentria, Stefano Sanvito, Sabre Kais, Fahhad H. Alharbi
ChemSusChem, March 21, 2017, https://doi.org/10.1002/cssc.201700121 Read article

Redox Catalysis for Improved Counter-Electrode Kinetics in Dye-Sensitized Solar Cells

Redox Catalysis for Improved Counter‐Electrode Kinetics in Dye‐Sensitized Solar Cells

To dye for: A new type of counter electrode based on the concept of redox catalysis is designed and applied in dye-sensitized solar cells.

[Article]
Li Fan, James Robert Jennings, Shaik M. Zakeeruddin, Michael Grätzel, Qing Wang
ChemElectroChem, March 21, 2017, https://doi.org/10.1002/celc.201700103 Read article

Atomic Layer Deposition Enabled Perovskite/PEDOT Solar Cells in a Regular n–i–p Architectural Design

Atomic Layer Deposition Enabled Perovskite/PEDOT Solar Cells in a Regular n–i–p Architectural Design

Perovskite solar cells employing poly(3,4-ethylenedioxythiophene) (PEDOT) as a hole transport layer on top of methylammonium lead halide are reported, yielding a power conversion efficiency of 11% and a 6% stabilized power output. An atomic layer deposition assisted interface architectural approach is adopted to fabricate the n–i–p perovskite/PEDOT devices. The results present a promising next step toward efficient low-cost perovskite-based photovoltaic technology.

[Communication]
Dibyashree Koushik, Wiljan J. H. Verhees, Dong Zhang, Yinghuan Kuang, Sjoerd Veenstra, Mariadriana Creatore, Ruud E. I. Schropp
Adv. Mater. Interfaces, March 21, 2017, https://doi.org/10.1002/admi.201700043 Read article

Suppression of Hysteresis Effects in Organohalide Perovskite Solar Cells

Suppression of Hysteresis Effects in Organohalide Perovskite Solar Cells

A high PCE of 17.1% for a planar structured perovskite solar cell is presented by simply depositing a phosphonic acid based mixed self-assembled monolayer (SAM) layer on top of transparent electrodes. This ultrathin SAM layer improves not only the charge extraction but also the crystalline quality of perovskite films and results in an effectively suppressed hysteresis effect.

[Communication]
Yi Hou, Simon Scheiner, Xiaofeng Tang, Nicola Gasparini, Moses Richter, Ning Li, Peter Schweizer, Shi Chen, Haiwei Chen, Cesar Omar Ramirez Quiroz, Xiaoyan Du, Gebhard J. Matt, Andres Osvet, Erdmann Spiecker, Rainer H. Fink, Andreas Hirsch, Marcus Halik, Christoph J. Brabec
Adv. Mater. Interfaces, March 21, 2017, https://doi.org/10.1002/admi.201700007 Read article

Efficient Semitransparent Solar Cells with High NIR Responsiveness Enabled by a Small-Bandgap Electron Acceptor

Efficient Semitransparent Solar Cells with High NIR Responsiveness Enabled by a Small‐Bandgap Electron Acceptor

A small-bandgap electron acceptor ATT-2 is designed and synthesized. By combining PTB7-Th donor, power conversion efficiencies reach 9.58% and 7.74% for opaque and semitransparent devices, respectively. The highest PCE among single-junction STOPVs can be attributed to the beneficial complementary near-infrared absorption of the low-bandgap donor and small-bandgap acceptor. Non-fullerene acceptors are thus very promising for the development of high-performance STOPVs.

[Communication]
Feng Liu, Zichun Zhou, Cheng Zhang, Jianyun Zhang, Qin Hu, Thomas Vergote, Feng Liu, Thomas P. Russell, Xiaozhang Zhu
Adv. Mater., March 21, 2017, https://doi.org/10.1002/adma.201606574 Read article

Structure of Organometal Halide Perovskite Films as Determined with Grazing-Incidence X-Ray Scattering Methods

Structure of Organometal Halide Perovskite Films as Determined with Grazing‐Incidence X‐Ray Scattering Methods

Grazing-incidence X-ray scattering is a powerful tool for investigating the morphology of hybrid perovskite thin films. This research news covers a broad range of grazing-incidence small- and wide-angle X-ray scattering studies and sheds light on the remarkable possibilities these methods offer for understanding film morphology, film formation, crystallization, and degradation mechanisms when combined with advanced data treatment.

[Research News]
Johannes Schlipf, Peter Müller-Buschbaum
Adv. Energy Mater., March 20, 2017, https://doi.org/10.1002/aenm.201700131 Read article

High-Performance and Stable All-Polymer Solar Cells Using Donor and Acceptor Polymers with Complementary Absorption

High‐Performance and Stable All‐Polymer Solar Cells Using Donor and Acceptor Polymers with Complementary Absorption

High-performance and stable all-polymer solar cells (all-PSCs) are realized by incorporating a pair of donor and acceptor polymers with complementary absorption. The high power conversion efficiency of 6.9% retains 90% for 60 d, which highlights the promising future of all-PSCs.

[Full Paper]
Zhaojun Li, Wei Zhang, Xiaofeng Xu, Zewdneh Genene, Dario Di Carlo Rasi, Wendimagegn Mammo, Arkady Yartsev, M. R. Andersson, René A. J. Janssen, Ergang Wang
Adv. Energy Mater., March 20, 2017, https://doi.org/10.1002/aenm.201602722 Read article

Concept of Quantum Geometry in Optoelectronic Processes in Solids: Application to Solar Cells

Concept of Quantum Geometry in Optoelectronic Processes in Solids: Application to Solar Cells

A pedagogical review on the geometry in the quantum theory of electrons in solids is presented. The Bloch wavefunction in momentum space is characterized by the Berry phase, i.e., the connection between the neighboring crystal momenta, which acts as the intracell coordinate. The optical transition induces the shift of this intracell coordinate to result in a DC current in noncentrosymmetric crystals called the shift current.

[Progress Report]
Naoto Nagaosa, Takahiro Morimoto
Adv. Mater., March 20, 2017, https://doi.org/10.1002/adma.201603345 Read article

Self-Encapsulating Thermostable and Air-Resilient Semitransparent Perovskite Solar Cells

Self‐Encapsulating Thermostable and Air‐Resilient Semitransparent Perovskite Solar Cells

SnOx/Ag/SnOx-based semitransparent electrodes are used to prepare self-encapsulated semitransparent perovskite solar cells, in which the SnOx grown by atomic layer deposition serves as a permeation barrier. The semitransparent cells show an efficiency of 11.8% and 29% average transmittance between 400 and 900 nm, realizing an outstanding stability over more than 4500 h in ambient air and at elevated temperatures.

[Communication]
J. Zhao, K. O. Brinkmann, T. Hu, N. Pourdavoud, T. Becker, T. Gahlmann, R. Heiderhoff, A. Polywka, P. Görrn, Y. Chen, B. Cheng, T. Riedl
Adv. Energy Mater., March 17, 2017, https://doi.org/10.1002/aenm.201602599 Read article

Interfacial Engineering of Perovskite Solar Cells by Employing a Hydrophobic Copper Phthalocyanine Derivative as Hole-Transporting Material with Improved Performance and Stability

Interfacial Engineering of Perovskite Solar Cells by Employing a Hydrophobic Copper Phthalocyanine Derivative as Hole‐Transporting Material with Improved Performance and Stability

Lighten up: Solution-processable tetra-4-(bis(4-tert-butylphenyl)amino)phenoxy-substituted copper phthalocyanine (CuPc-OTPAtBu) is synthesized and explored as a hole-transporting material (HTM) in perovskite solar cells, showing a decent efficiency of 15.0 % together with excellent long-term stability.

[Full Paper]
Xiaoqing Jiang, Ze Yu, Jianbo Lai, Yuchen Zhang, Maowei Hu, Ning Lei, Dongping Wang, Xichuan Yang, Licheng Sun
ChemSusChem, March 16, 2017, https://doi.org/10.1002/cssc.201700150 Read article

Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers

Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers

An organic solar cell (OSCs) containing double bulk heterojunction (BHJ) layers, namely, double-BHJ OSCs is constructed via stamp-transferring of low bandgap BHJ layer atop of mediate bandgap active layers. Such devices obtain a large gain in photocurrent due to the enhanced photo harvest with little fill-factor drop. Overall, double-BHJ OSC results in high power conversion efficiencies over 12%.

[Communication]
Jiang Huang, Hanyu Wang, Kangrong Yan, Xiaohua Zhang, Hongzheng Chen, Chang-Zhi Li, Junsheng Yu
Adv. Mater., March 15, 2017, https://doi.org/10.1002/adma.201606729 Read article

Dual-Source Precursor Approach for Highly Efficient Inverted Planar Heterojunction Perovskite Solar Cells

Dual‐Source Precursor Approach for Highly Efficient Inverted Planar Heterojunction Perovskite Solar Cells

A dual-source precursor approach is developed to fabricate a high-quality and mirror-like mixed-cation perovskite without involving additional antisolvent process. By integrating the perovskite films into the planar heterojunction solar cells, a power conversion efficiency of 20.15% is achieved with negligible hysteresis effect. A stabilized power output approaching 20% is obtained at the maximum power point.

[Communication]
Deying Luo, Lichen Zhao, Jiang Wu, Qin Hu, Yifei Zhang, Zhaojian Xu, Yi Liu, Tanghao Liu, Ke Chen, Wenqiang Yang, Wei Zhang, Rui Zhu, Qihuang Gong
Adv. Mater., March 15, 2017, https://doi.org/10.1002/adma.201604758 Read article

Single-Junction Binary-Blend Nonfullerene Polymer Solar Cells with 12.1% Efficiency

Single‐Junction Binary‐Blend Nonfullerene Polymer Solar Cells with 12.1% Efficiency

Single-junction binary-blend nonfullerene polymer solar cells based on fluorinated acceptor ITIC-Th1 afford power conversion efficiency of 12.1%, which is much higher than those of nonfluorinated ITIC-Th (8.88%) and PC71BM (5.22%) counterparts under the same condition. Moreover, the nonfullerene devices exhibit better thermal stability than the fullerene devices.

[Communication]
Fuwen Zhao, Shuixing Dai, Yang Wu, Qianqian Zhang, Jiayu Wang, Li Jiang, Qidan Ling, Zhixiang Wei, Wei Ma, Wei You, Chunru Wang, Xiaowei Zhan
Adv. Mater., March 10, 2017, https://doi.org/10.1002/adma.201700144 Read article

The Effect of H- and J-Aggregation on the Photophysical and Photovoltaic Properties of Small Thiophene–Pyridine–DPP Molecules for Bulk-Heterojunction Solar Cells

The Effect of H‐ and J‐Aggregation on the Photophysical and Photovoltaic Properties of Small Thiophene–Pyridine–DPP Molecules for Bulk‐Heterojunction Solar Cells

The aggregation behavior of electronically identical thiophene–pyridine–diketopyrrolopyrrole molecules is modulated by introducing and modifying the position of two hexyl side chains on the peripheral thiophene rings. Improved photovoltaic performance is achieved for those molecules assembling into J-type aggregates in contrast to those forming H-aggregates as a result of a faster charge generation and a reduced bimolecular recombination.

[Full Paper]
Miriam Más-Montoya, René A. J. Janssen
Adv. Funct. Mater., March 10, 2017, https://doi.org/10.1002/adfm.201605779 Read article

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

Recent Progress in Metal–Organic Frameworks and Their Derived Nanostructures for Energy and Environmental Applications

Cleaning up with MOFs: Recent progress in the design and synthesis of metal–organic frameworks (MOFs) and MOF-derived nanomaterials for applications in lithium-ion batteries, sodium-ion batteries, supercapacitors, dye-sensitized solar cells, and heavy-metal-ion detection and removal is reviewed. Remaining major challenges in these fields are discussed and some perspectives for future research efforts in the development of MOFs are also provided.

[Review]
Zhiqiang Xie, Wangwang Xu, Xiaodan Cui, Ying Wang
ChemSusChem, March 09, 2017, https://doi.org/10.1002/cssc.201601855 Read article

Inorganic Rubidium Cation as an Enhancer for Photovoltaic Performance and Moisture Stability of HC(NH2)2PbI3 Perovskite Solar Cells

Inorganic Rubidium Cation as an Enhancer for Photovoltaic Performance and Moisture Stability of HC(NH2)2PbI3 Perovskite Solar Cells

Partial substitution of inorganic rubidium cation (Rb+) for formamidinium lead iodide (FAPbI3) perovskite suppresses nonperovskite phase formation and increases fluorescence lifetime. Introduction of the smaller monovalent cation in FAPbI3 renders the perovskite more tolerant to high humidity. These lead to enhanced photovoltaic performances and long-term stability of perovskite solar cells based on Rb-mixed FAPbI3.

[Full Paper]
Yun Hee Park, Inyoung Jeong, Seunghwan Bae, Hae Jung Son, Phillip Lee, Jinwoo Lee, Chul-Ho Lee, Min Jae Ko
Adv. Funct. Mater., March 09, 2017, https://doi.org/10.1002/adfm.201605988 Read article

Roll-to-Roll Printed Large-Area All-Polymer Solar Cells with 5% Efficiency Based on a Low Crystallinity Conjugated Polymer Blend

Roll‐to‐Roll Printed Large‐Area All‐Polymer Solar Cells with 5% Efficiency Based on a Low Crystallinity Conjugated Polymer Blend

The morphology formation of different all-polymer solar cells during the coating process is investigated and that a low crystalline donor and acceptor polymer blend has stable morphology between the various coating methods is identified. Large-area all-polymer solar cells are continuously roll-to-roll slot die printed with power conversion efficiencies of 5%, with combined cell area up to 10 cm2.

[Full Paper]
Xiaodan Gu, Yan Zhou, Kevin Gu, Tadanori Kurosawa, Yikun Guo, Yunke Li, Haoran Lin, Bob C. Schroeder, Hongping Yan, Francisco Molina-Lopez, Christopher J. Tassone, Cheng Wang, Stefan C. B. Mannsfeld, He Yan, Dahui Zhao, Michael F. Toney, Zhenan Bao
Adv. Energy Mater., March 07, 2017, https://doi.org/10.1002/aenm.201602742 Read article

High-Efficiency Photovoltaic Devices using Trap-Controlled Quantum-Dot Ink prepared via Phase-Transfer Exchange

High‐Efficiency Photovoltaic Devices using Trap‐Controlled Quantum‐Dot Ink prepared via Phase‐Transfer Exchange

A colloidal quantum dot (CQD)-ink is developed by phase-transfer exchange, enabling the fabrication of active layers by single-step coating to achieve a thick film. The CQD-ink exhibits low surface traps due to improvement of surface passivation. Thus, incorporating the CQD-ink into devices shows high efficiency and low voltage loss.

[Communication]
Havid Aqoma, Muhibullah Al Mubarok, Wisnu Tantyo Hadmojo, Eun-Hye Lee, Tae-Wook Kim, Tae Kyu Ahn, Seung-Hwan Oh, Sung-Yeon Jang
Adv. Mater., March 07, 2017, https://doi.org/10.1002/adma.201605756 Read article

High-Performance Colorful Semitransparent Polymer Solar Cells with Ultrathin Hybrid-Metal Electrodes and Fine-Tuned Dielectric Mirrors

High‐Performance Colorful Semitransparent Polymer Solar Cells with Ultrathin Hybrid‐Metal Electrodes and Fine‐Tuned Dielectric Mirrors

This study demonstrates that the performance, reproducibility, and colors of inverted semitransparent polymer solar cells (PSCs) can be significantly improved or tuned by combining hybrid Au/Ag, fine-tuned dielectric mirrors, and active layers with various bandgaps. The PTB7-Th:PC71BM-based inverted semitransparent PSCs exhibit a maximum power conversion efficiency of 7.0% on rigid substrate and 6.4% on flexible substrate.

[Full Paper]
Guiying Xu, Liang Shen, Chaohua Cui, Shanpeng Wen, Rongming Xue, Weijie Chen, Haiyang Chen, Jingwen Zhang, Hongkun Li, Yaowen Li, Yongfang Li
Adv. Funct. Mater., March 07, 2017, https://doi.org/10.1002/adfm.201605908 Read article

Hybrid Photoconductive Cathode Interlayer Materials Composed of Perylene Bisimide Photosensitizers and Zinc Oxide for High Performance Polymer Solar Cells

Hybrid Photoconductive Cathode Interlayer Materials Composed of Perylene Bisimide Photosensitizers and Zinc Oxide for High Performance Polymer Solar Cells

Hybrid photoconductive cathode interlayers based on zinc oxide doped with perylene bisimide dye molecules show increased conductivity under light irradiation due to enhanced electron mobility and carrier density, enabling high performance polymer solar cells at interlayer thickness of up to 100 nm, which is desired for roll-to-roll processing techniques to facilitate mass production of photovoltaic modules.

[Research News]
Zengqi Xie, Frank Würthner
Adv. Energy Mater., March 06, 2017, https://doi.org/10.1002/aenm.201602573 Read article

Progress in Tandem Solar Cells Based on Hybrid Organic–Inorganic Perovskites

Progress in Tandem Solar Cells Based on Hybrid Organic–Inorganic Perovskites

Recent progress in the research and development PSCs-based tandem solar cells is reviewed. Different architectures, such as monolithically-integrated, mechanically-stacked, and optically-coupled tandems are discussed. The development of transparent electrodes and wide bandgap PSCs are presented. The power losses in the tandem solar cells are analyzed.

[Review]
Bo Chen, Xiaopeng Zheng, Yang Bai, Nitin P. Padture, Jinsong Huang
Adv. Energy Mater., March 06, 2017, https://doi.org/10.1002/aenm.201602400 Read article

Direct Evidence of Ion Diffusion for the Silver-Electrode-Induced Thermal Degradation of Inverted Perovskite Solar Cells

Direct Evidence of Ion Diffusion for the Silver‐Electrode‐Induced Thermal Degradation of Inverted Perovskite Solar Cells

Silver-electrode-induced thermal degradation of the inverted perovskite solar cells is investigated with direct evidences. The diffusion of iodide and methylamine ions is directly observed in the elemental depth profile during thermal treatment only when the Ag electrode is introduced. The loss of ions leads to the reconstruction of the grain boundaries and forming thick PbI2 gaps between crystal grains.

[Full Paper]
Jiangwei Li, Qingshun Dong, Nan Li, Liduo Wang
Adv. Energy Mater., March 03, 2017, https://doi.org/10.1002/aenm.201602922 Read article

Organic Gelators as Growth Control Agents for Stable and Reproducible Hybrid Perovskite-Based Solar Cells

Organic Gelators as Growth Control Agents for Stable and Reproducible Hybrid Perovskite‐Based Solar Cells

Organic gelators, widely used in the processing of commodity “plastics,” are applied to hybrid halide perovskites solidification. They are shown to beneficially influence the nucleation and growth of the perovskite sol–gel precursor phase, leading to a material characterized by a higher stability to moisture and a reduced hysteresis in planar n-i-p heterojunction solar cells.

[Full Paper]
Sofia Masi, Aurora Rizzo, Rahim Munir, Andrea Listorti, Antonella Giuri, Carola Esposito Corcione, Neil D. Treat, Giuseppe Gigli, Aram Amassian, Natalie Stingelin, Silvia Colella
Adv. Energy Mater., March 03, 2017, https://doi.org/10.1002/aenm.201602600 Read article

Perovskite Solar Cells on the Way to Their Radiative Efficiency Limit – Insights Into a Success Story of High Open-Circuit Voltage and Low Recombination

Perovskite Solar Cells on the Way to Their Radiative Efficiency Limit – Insights Into a Success Story of High Open‐Circuit Voltage and Low Recombination

Perovskite solar cells show exceptionally high photovoltages. This progress report discusses the current understanding of the main material properties that are responsible for the high electronic quality of the metal-halide perovskites. Amongst them is a pronounced defect tolerance, which facilitates low non-radiative recombination rates and high luminescence yields.

[Progress Report]
Wolfgang Tress
Adv. Energy Mater., March 03, 2017, https://doi.org/10.1002/aenm.201602358 Read article

Charge Transfer Processes in OPV Materials as Revealed by EPR Spectroscopy

Charge Transfer Processes in OPV Materials as Revealed by EPR Spectroscopy

Light-induced EPR spectroscopy is ideally suited to study charge separated states in BHJ since it selectively probes the paramagnetic charge carriers and excited states. This review focusses on the application of advanced EPR techniques to characterize the electronic structure of positive and negative polarons as well as dynamics of spin-dependent charge separation and charge recombination processes in organic photovoltaic materials.

[Review]
Jens Niklas, Oleg G. Poluektov
Adv. Energy Mater., March 03, 2017, https://doi.org/10.1002/aenm.201602226 Read article

Bithiazole: An Intriguing Electron-Deficient Building for Plastic Electronic Applications

Bithiazole: An Intriguing Electron‐Deficient Building for Plastic Electronic Applications

Heterocyclic thiazole units can be incorporated into organic semiconducting materials, thus allowing the optoelectronic properties of a material to be tuned without significantly perturbing its molecular structure and affording high-performance acceptor polymers for use in bulk-heterojunction solar cells and as organic field-effect transistors.

[Review]
Haw-Lih Su, Dusan N. Sredojevic, Hugo Bronstein, Tobin J. Marks, Bob C. Schroeder, Mohammed Al-Hashimi
Macromol. Rapid Commun., March 02, 2017, https://doi.org/10.1002/marc.201600610 Read article

Morphology Engineering: A Route to Highly Reproducible and High Efficiency Perovskite Solar Cells

Morphology Engineering: A Route to Highly Reproducible and High Efficiency Perovskite Solar Cells

A matter of control: Here, we introduce thermal annealing as a powerful tool to generate a well-controlled excess of PbI2 in the perovskite formulation and show that this benefits the photovoltaic performance. An optimized average grain size/thickness aspect ratio of the perovskite crystallite is identified, which brings about a highly reproducible power conversion efficiency (PCE) of 19.5 %, with a certified value of 19.08 %.

[Full Paper]
Dongqin Bi, Jingshan Luo, Fei Zhang, Arnaud Magrez, Evangelia Nefeli Athanasopoulou, Anders Hagfeldt, Michael Grätzel
ChemSusChem, February 28, 2017, https://doi.org/10.1002/cssc.201601387 Read article

A novel source of atomic hydrogen for passivation of defects in silicon

A novel source of atomic hydrogen for passivation of defects in silicon

This letter details a new approach for introducing atomic hydrogen to silicon samples, dubbed shielded hydrogen passivation. This method involves placing a thin metallic “shield”, in the current work a 10 nm palladium leaf, between a plasma hydrogen source and the sample. This shield prevents any damage to the samples from UV radiation or energetic particles, while still providing effective hydrogen passivation.

[Rapid Research Letter]
Phillip Hamer, Gabrielle Bourret-Sicotte, George Martins, Alison Wenham, Ruy S. Bonilla, Peter Wilshaw
Phys. Status Solidi RRL, February 27, 2017, https://doi.org/10.1002/pssr.201600448 Read article

Radial junction solar cells prepared on single crystalline silicon wafers by metal-assisted etching

Radial junction solar cells prepared on single crystalline silicon wafers by metal‐assisted etching

In recent years, novel geometries have been started to be applied to photovoltaics structures to obtain higher efficiencies. One of these structures is the radial junction with micro/nanopillars. In this work, the effect of micropillars length on surface reflection has been investigated and enhancement in efficiency was observed by increasing the length of the micropillars. In their Letter, Baytemir et al. present a radial junction solar cell with efficiency of 15.6%.

[Rapid Research Letter]
Gulsen Baytemir, Firat Es, Arif Sinan Alagoz, Rasit Turan
Phys. Status Solidi RRL, February 27, 2017, https://doi.org/10.1002/pssr.201600444 Read article

High Efficiency Ternary Nonfullerene Polymer Solar Cells with Two Polymer Donors and an Organic Semiconductor Acceptor

High Efficiency Ternary Nonfullerene Polymer Solar Cells with Two Polymer Donors and an Organic Semiconductor Acceptor

A ternary nonfullerene polymer solar cell with a high efficiency of 9.70% is realized by using an n-type organic semiconductor ITIC acceptor and two polymer donors of medium bandgap polymer J51 and narrow bandgap polymer PTB7-Th with the polymer weight ratio of 0.8:0.2.

[Communication]
Lian Zhong, Liang Gao, Haijun Bin, Qin Hu, Zhi-Guo Zhang, Feng Liu, Thomas P. Russell, Zhanjun Zhang, Yongfang Li
Adv. Energy Mater., February 24, 2017, https://doi.org/10.1002/aenm.201602215 Read article

Carbazole-Fused Zinc(II)−Phthalocyanine Sensitizers

Carbazole‐Fused Zinc(II)−Phthalocyanine Sensitizers

Think zinc: Ring-expanded zinc phthalocyanines were synthesized from new carbazole-fused phthalonitriles and the effect of direct annulation of heterocycles with the macrocycles on their optical and electrochemical properties was investigated.

[Full Paper]
Mutsumi Kimura, Hiroyuki Suzuki, Yuki Tohata, Takuro Ikeuchi, Satoshi Yamamoto, Nagao Kobayashi
Asian J. Org. Chem., February 22, 2017, https://doi.org/10.1002/ajoc.201600609 Read article

Solution-Processable Hyperbranched Conjugated Polymer Nanoparticles Based on C3h-Symmetric Benzotrithiophene for Polymer Solar Cells

Solution‐Processable Hyperbranched Conjugated Polymer Nanoparticles Based on C3h‐Symmetric Benzotrithiophene for Polymer Solar Cells

C3h-symmetric benzotrithiophene-based hyperbranched conjugated polymer nanoparticles (BTT-HCPNs) with tunable particle sizes are prepared via Stille miniemulsion polymerization for the first time. Comparing with the corresponding star-shaped small molecule (C3h-BTT core with three diketopyrrolopyrrole arms), solution-processable BTT-HCPNs show redshifted and broader absorption spectra and narrower bandgaps, leading to higher power conversion efficiencies for solar cells based on BTT-HCPNs/PC71BM.

[Communication]
Xiaofu Wu, Zijian Zhang, Hao Hang, Yonghong Chen, Yuxiang Xu, Hui Tong, Lixiang Wang
Macromol. Rapid Commun., February 21, 2017, https://doi.org/10.1002/marc.201700001 Read article

Improving Perovskite Solar Cells: Insights From a Validated Device Model

Improving Perovskite Solar Cells: Insights From a Validated Device Model

A numerical model is developed and validated that describes the operation of perovskite solar cells and quantitatively explains the role of contacts, the charge transport layers, charge generation, drift and diffusion of carriers and recombination. By doing so, a unique set of material parameters and physical processes is identified that describes these solar cells. To increase their performance, some guidelines are issued.

[Full Paper]
Tejas S. Sherkar, Cristina Momblona, Lidón Gil-Escrig, Henk J. Bolink, L. Jan Anton Koster
Adv. Energy Mater., February 21, 2017, https://doi.org/10.1002/aenm.201602432 Read article

Additive-Free Organic Solar Cells with Power Conversion Efficiency over 10%

Additive‐Free Organic Solar Cells with Power Conversion Efficiency over 10%

Organic photovoltaic devices with PThBDTP as donor and PC71BM as acceptor are fabricated, and a power conversion efficiency of over 10% is achieved without resorting to any additives and post treatments.

[Communication]
Hui Li, Dan He, Peng Mao, Yuanzhi Wei, Liming Ding, Jizheng Wang
Adv. Energy Mater., February 17, 2017, https://doi.org/10.1002/aenm.201602663 Read article

Combining Energy Transfer and Optimized Morphology for Highly Efficient Ternary Polymer Solar Cells

Combining Energy Transfer and Optimized Morphology for Highly Efficient Ternary Polymer Solar Cells

Ternary polymer solar cells based on PTB7-Th:PffBT4T-2OD:PC71BM are designed according to the complementary properties of PTB7-Th and PffBT4T-2OD. The highest efficiency of 10.72% for this ternary system is achieved with 15% PffBT4T-2OD. As for the working mechanism, this ternary system paves the way to investigate the morphology–performance relationship. Moreover, the energy transfer is involved in ternary blend.

[Full Paper]
Fuwen Zhao, Yang Li, Zaiyu Wang, Yang Yang, Zhen Wang, Guiying He, Jianqi Zhang, Li Jiang, Taishan Wang, Zhixiang Wei, Wei Ma, Bao Li, Andong Xia, Yongfang Li, Chunru Wang
Adv. Energy Mater., February 17, 2017, https://doi.org/10.1002/aenm.201602552 Read article

Charge Transfer from Methylammonium Lead Iodide Perovskite to Organic Transport Materials: Efficiencies, Transfer Rates, and Interfacial Recombination

Charge Transfer from Methylammonium Lead Iodide Perovskite to Organic Transport Materials: Efficiencies, Transfer Rates, and Interfacial Recombination

The dynamics of charge transfer from CH3NH3PbI3 to charge-specific transport materials are revealed using time-resolved microwave conductivity measurements and a global kinetic model. Hence, the authors find that the transfer rates to C60, PCBM, EDOT-OMeTPA, and Spiro-OMeTAD are sufficient to outcompete other recombination pathways at excitation densities representative for AM1.5, while this is not the case for bis-PCBM, ICBA, and H101.

[Full Paper]
Eline M. Hutter, Jan-Jaap Hofman, Michiel L. Petrus, Michiel Moes, Ruben D. Abellón, Pablo Docampo, Tom J. Savenije
Adv. Energy Mater., February 17, 2017, https://doi.org/10.1002/aenm.201602349 Read article

Effect of Polymer–Fullerene Interaction on the Dielectric Properties of the Blend

Effect of Polymer–Fullerene Interaction on the Dielectric Properties of the Blend

The relationship between the dielectric constant and the device performance is investigated in polymer solar cells. The increase in the dielectric constant observed upon polymer–fullerene blending correlates well with device performance, in contrast to the pristine polymer dielectric constant. More importantly, the increase in excited state polarizability upon blending is a key indicator of device performance and is responsible for efficient charge transfer.

[Full Paper]
Iordania Constantinou, Xueping Yi, Nathan T. Shewmon, Erik D. Klump, Cheng Peng, Sofia Garakyaraghi, Chi Kin Lo, John R. Reynolds, Felix N. Castellano, Franky So
Adv. Energy Mater., February 17, 2017, https://doi.org/10.1002/aenm.201601947 Read article

Beyond Donor–Acceptor (D–A) Approach: Structure–Optoelectronic Properties—Organic Photovoltaic Performance Correlation in New D–A1–D–A2 Low-Bandgap Conjugated Polymers

Beyond Donor–Acceptor (D–A) Approach: Structure–Optoelectronic Properties—Organic Photovoltaic Performance Correlation in New D–A1–D–A2 Low‐Bandgap Conjugated Polymers

New low bandgap conjugated polymers have been developed based on the D–A1–D–A2 approach. Systematic studies provide the first insights into how the nature of the monomers used to synthesize these new D–A1–D–A2 low bandgap copolymers adjust the maximum absorption wavelengths, the optical and electrochemical bandgaps, the ionization potential and the electron affinity, and finally the organic photovoltaic performances.

[Communication]
Christos L. Chochos, Sofia Drakopoulou, Athanasios Katsouras, Benedetta M. Squeo, Christian Sprau, Alexander Colsmann, Vasilis G. Gregoriou, Alex-Palma Cando, Sybille Allard, Ullrich Scherf, Nicola Gasparini, Negar Kazerouni, Tayebeh Ameri, Christoph J. Brabec, Apostolos Avgeropoulos
Macromol. Rapid Commun., February 13, 2017, https://doi.org/10.1002/marc.201600720 Read article

High-Performance Organic Solar Cells Based on a Non-Fullerene Acceptor with a Spiro Core

High‐Performance Organic Solar Cells Based on a Non‐Fullerene Acceptor with a Spiro Core

Up the junction: Bulk heterojunction (BHJ) solar cells based on PTB7-Th:SCPDT-PDI4 with 2 % DIO additive show a high performance with a power conversion efficiency (PCE) up to 7.11 % (PTB7-Th=poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)], SCPDT=4,4′-spirobi[cyclopenta[2,1-b;3,4-b′]dithiophene], PDI=perylenediimide, DIO=1,8-diiodooctane).

[Communication]
Hua Sun, Po Sun, Cong Zhang, Yingguo Yang, Xingyu Gao, Fei Chen, Zongxiang Xu, Zhi-Kuan Chen, Wei Huang
Chem. Asian J., February 07, 2017, https://doi.org/10.1002/asia.201601741 Read article

A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells

A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells

A novel passivated contact on crystalline silicon comprised of calcium and reduced titania is shown to result in a reduction in contact resistivity by up to two orders of magnitude compared to other titania-based contacts to crystalline silicon. This enables the fabrication of a first-of-its-kind passivated contact n-type c-Si PERC cell with an efficiency of 21.8%.

[Full Paper]
Thomas G. Allen, James Bullock, Quentin Jeangros, Christian Samundsett, Yimao Wan, Jie Cui, Aïcha Hessler-Wyser, Stefaan De Wolf, Ali Javey, Andres Cuevas
Adv. Energy Mater., February 03, 2017, https://doi.org/10.1002/aenm.201602606 Read article

Using Ultralow Dosages of Electron Acceptor to Reveal the Early Stage Donor–Acceptor Electronic Interactions in Bulk Heterojunction Blends

Using Ultralow Dosages of Electron Acceptor to Reveal the Early Stage Donor–Acceptor Electronic Interactions in Bulk Heterojunction Blends

Ultralow dosages of fullerene in bulk heterojunction are used to reveal the early stage electronic donor–acceptor interactions. Before percolation occurs, fullerene docks with polymer backbone and acts as electron traps. It increases electron trap density and lowers the electron mobility. The fill factors of the corresponding photovoltaic devices are found to anticorrelate with the trap density.

[Full Paper]
Carr Hoi Yi Ho, Sin Hang Cheung, Ho-Wa Li, Ka Lok Chiu, Yuanhang Cheng, Hang Yin, Mau Hing Chan, Franky So, Sai-Wing Tsang, Shu Kong So
Adv. Energy Mater., February 02, 2017, https://doi.org/10.1002/aenm.201602360 Read article

Supercapacitive Photo-Bioanodes and Biosolar Cells: A Novel Approach for Solar Energy Harnessing

Supercapacitive Photo‐Bioanodes and Biosolar Cells: A Novel Approach for Solar Energy Harnessing

The concept of supercapacitive photo-bioanode and biosolar cell (photo-biosupercapacitor) for simultaneous solar energy conversion and storage is demonstrated for the first time. Exploiting the capacitive component significantly improves the electron transfer processes and allows the achievement of a current density of 280 µA cm−2 in the pulse mode.

[Communication]
Galina Pankratova, Dmitry Pankratov, Kamrul Hasan, Hans-Erik Åkerlund, Per-Åke Albertsson, Dónal Leech, Sergey Shleev, Lo Gorton
Adv. Energy Mater., January 31, 2017, https://doi.org/10.1002/aenm.201602285 Read article

Triphenylamine Based Random Copolymers: The Effect of Molecular Weight on Performance of Solar Cell and Optoelectronic Properties

Triphenylamine Based Random Copolymers: The Effect of Molecular Weight on Performance of Solar Cell and Optoelectronic Properties

Two donor–acceptor-type conjugated random copolymers consisting of triphenylamine (TPA), 1,2,3-benzotriazole, and thiophene derivatives are synthesized. The optoelectronic and photovoltaic properties of PBTP1 and PBTP2 are compared. PBTP1 is composed of TPA, thiophene, and 2-dodecyl-2H-benzo[d][1,2,3]triazole 2-dodecyl-4,7-di(thiophen-2-yl)-2H-benzo[d][1,2,3]triazole whereas PBTP2 has 2-dodecyl-4,7-di(thiophen-2-yl)-2H-benzo[d][1,2,3]triazole, TPA, and thiophene. Bulk heterojunction organic solar cells are fabricated using the polymers.

[Full Paper]
Seza Goker, Serife O. Hacioglu, Gonul Hizalan, Ece Aktas, Ali Cirpan, Levent Toppare
Macromol. Chem. Phys., January 30, 2017, https://doi.org/10.1002/macp.201600544 Read article

Implementation of Single-Walled Carbon Nanohorns into Solar Cell Schemes

Implementation of Single‐Walled Carbon Nanohorns into Solar Cell Schemes

Research on nanocarbon-based DSSCs is on the rise. SWCNHs stand out given their unique production, functionalization, and dispersibility. They are applied as i) SWCNH/dye hybrids, ii) buffer layers, iii) active components in photo- and counter electrodes, and iv) additives in solid-state electrolytes. This review summarizes the recent achievements concerning their use with respect to those realized with other nanocarbons.

[Review]
Fabian Lodermeyer, Rubén D. Costa, Dirk M. Guldi
Adv. Energy Mater., January 30, 2017, https://doi.org/10.1002/aenm.201601883 Read article

Large-Grain Formamidinium PbI3–xBrx for High-Performance Perovskite Solar Cells via Intermediate Halide Exchange

Large‐Grain Formamidinium PbI3–xBrx for High‐Performance Perovskite Solar Cells via Intermediate Halide Exchange

Deliberate halide exchange between unstable intermediate HPbI2Br and nonstoichiometric FAI is employed to produce high-quality FAPbI3–xBrx (x ≈ 0.44), which eliminates the use of antisolvent dripping and other post-treatment techniques. The obtained perovskite thin film demonstrates high crystallinity and a large and compact crystal domain up to 2–3 µm. The corresponding device shows power conversion efficiency of up to around 19.0%, with reliable stability and reproducibility.

[Communication]
Mingzhu Long, Tiankai Zhang, Wangying Xu, Xiaoliang Zeng, Fangyan Xie, Qiang Li, Zefeng Chen, Fengrui Zhou, Kam Sing Wong, Keyou Yan, Jianbin Xu
Adv. Energy Mater., January 30, 2017, https://doi.org/10.1002/aenm.201601882 Read article

Engineering Processes at the Interface of p-Semiconductor for Enhancing the Open Circuit Voltage in p-Type Dye-Sensitized Solar Cells

Engineering Processes at the Interface of p‐Semiconductor for Enhancing the Open Circuit Voltage in p‐Type Dye‐Sensitized Solar Cells

It is demonstrated that the open circuit voltage (Voc) in p-type dye sensitized solar cells is heavily limited by interfacial charge recombination and consequently that higher Voc values above 100 mV and as high as 500 mV can be attained with conventional materials (NiO and electrolytes) if the deleterious interfacial charge recombination reactions can be decreased.

[Full Paper]
Ludovic Favereau, Yann Pellegrin, Lionel Hirsch, Adèle Renaud, Aurélien Planchat, Errol Blart, Guy Louarn, Laurent Cario, Stéphane Jobic, Mohammed Boujtita, Fabrice Odobel
Adv. Energy Mater., January 30, 2017, https://doi.org/10.1002/aenm.201601776 Read article

Simultaneous Substitution of Silicon and Fluorine Atom on Donor–Acceptor Copolymers for Photovoltaic Applications

Simultaneous Substitution of Silicon and Fluorine Atom on Donor–Acceptor Copolymers for Photovoltaic Applications

In this article, all of the three synthesized polymers display wide UV–vis absorptions ranging from 300 to 1100 nm and relatively low band gaps. Both silole-containing copolymers exhibit higher hole mobilities than those of the 4,4-diethylhexyl-cyclopenta[2,1-b:3,4-b′]dithiophene-containing polymer and poly(3-hexylthiophene-2,5-diyl). The photovoltaic performance of fluorinated polymer is significantly improved due to the increased J sc and enhanced V oc.

[Full Paper]
Shang-Cyuan Huang, Chien-Hsin Yang, Yao-Yuan Chuang, Tzong-Liu Wang
Macromol. Chem. Phys., January 27, 2017, https://doi.org/10.1002/macp.201600410 Read article

Chemical Vapor Deposition of Perovskites for Photovoltaic Application

Chemical Vapor Deposition of Perovskites for Photovoltaic Application

Recently, the cost-effective tubular chemical vapor deposition has been successfully introduced into the fabrication of perovskite solar cells and emerged as a promising technology for their future mass production. Herein, recent progress in the fields of material preparation, characterization, property and application are discussed.

[Research News]
Paifeng Luo, Shengwen Zhou, Wei Xia, Jigui Cheng, Chengxi Xu, Yingwei Lu
Adv. Mater. Interfaces, January 27, 2017, https://doi.org/10.1002/admi.201600970 Read article

Emerging of Inorganic Hole Transporting Materials For Perovskite Solar Cells

Emerging of Inorganic Hole Transporting Materials For Perovskite Solar Cells

Recently, hole transport materials based on inorganic metal oxides have rapidly increased in place of organic materials like spiro due to stability, ease of synthesis and low cost for perovskite solar cells. The device efficiency using inorganic hole transport materials have crossed 19% which is on par with spiro based devices. This review covers recent developments on inorganic based hole transport materials for perovskite solar cells.

[Personal Account]
Ramireddy Rajeswari, Madoori Mrinalini, Seelam Prasanthkumar, Lingamallu Giribabu
Chem. Rec., January 04, 2017, https://doi.org/10.1002/tcr.201600117 Read article

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