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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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Terthieno[3,2-b]Thiophene (6T) Based Low Bandgap Fused-Ring Electron Acceptor for Highly Efficient Solar Cells with a High Short-Circuit Current Density and Low Open-Circuit Voltage Loss

Terthieno[3,2‐b]Thiophene (6T) Based Low Bandgap Fused‐Ring Electron Acceptor for Highly Efficient Solar Cells with a High Short‐Circuit Current Density and Low Open‐Circuit Voltage Loss

Terthieno[3,2-b]thiophene (6T) based low bandgap fused-ring electron acceptor, 6TIC, is developed for highly efficient solar cells, which exhibits a high power conversion efficiency (PCE) of 11.07% with a high JSC over 20 mA cm−2 and a high VOC of 0.83 V with a relatively low VOC loss (≈0.55 V). Moreover, the semitransparent solar cell based on PTB7-Th:6TIC exhibits a very promising PCE of 7.62%.

[Full Paper]
Xueliang Shi, Jingde Chen, Ke Gao, Lijian Zuo, Zhaoyang Yao, Feng Liu, Jianxin Tang, Alex K.-Y. Jen
Adv. Energy Mater., January 19, 2018, https://doi.org/10.1002/aenm.201702831 Read article

Efficient, Hysteresis-Free, and Stable Perovskite Solar Cells with ZnO as Electron-Transport Layer: Effect of Surface Passivation

Efficient, Hysteresis‐Free, and Stable Perovskite Solar Cells with ZnO as Electron‐Transport Layer: Effect of Surface Passivation

Surface passivation of ZnO by a thin layer of MgO and protonated ethanolamine readily makes ZnO a very promising electron-transporting material for creating efficient, hysteresis-free and stable perovskite solar cells (PSCs). PSCs, stable in air for more than 300 h, are achieved when graphene is used to encapsulate the cells.

[Communication]
Jing Cao, Binghui Wu, Ruihao Chen, Youyunqi Wu, Yong Hui, Bing-Wei Mao, Nanfeng Zheng
Adv. Mater., January 19, 2018, https://doi.org/10.1002/adma.201705596 Read article

Superfast Room-Temperature Activation of SnO2 Thin Films via Atmospheric Plasma Oxidation and their Application in Planar Perovskite Photovoltaics

Superfast Room‐Temperature Activation of SnO2 Thin Films via Atmospheric Plasma Oxidation and their Application in Planar Perovskite Photovoltaics

A tin oxide (SnO2) electron transport layer for a perovskite solar cell is successfully fabricated at extremely high speeds at a genuinely low temperature using atmospheric Ar/O2 plasma annealing. This plasma-annealed SnO2 (P-SnO2) exhibits outstanding electrical conductivity and charge-extraction ability compared to thermally-annealed SnO2, consequently achieving a superior PCE of 19.56% in P-SnO2-based PSCs.

[Communication]
Haejun Yu, Hye-In Yeom, Jong Woo Lee, Kisu Lee, Doyk Hwang, Juyoung Yun, Jaehoon Ryu, Jungsup Lee, Sohyeon Bae, Seong Keun Kim, Jyongsik Jang
Adv. Mater., January 19, 2018, https://doi.org/10.1002/adma.201704825 Read article

NixSy Nanowalls/Nitrogen-Doped Graphene Foam Is an Efficient Trifunctional Catalyst for Unassisted Artificial Photosynthesis

NixSy Nanowalls/Nitrogen‐Doped Graphene Foam Is an Efficient Trifunctional Catalyst for Unassisted Artificial Photosynthesis

A trifunctional catalyst based on NixSy nanowalls (NWs) on nitrogen-doped graphene foam (NGF) can be efficiently applied in dye-sensitized solar cells (DSSCs) and overall water splitting. An unassisted artificial photosynthesis device constructed by a NixSy NW/NGF-based tandem DSSC-electrolyzer gives a solar-to-hydrogen efficiency of 3.2%.

[Full Paper]
Haiyuan Zou, Bowen He, Panyong Kuang, Jiaguo Yu, Ke Fan
Adv. Funct. Mater., January 19, 2018, https://doi.org/10.1002/adfm.201706917 Read article

All-Carbon-Electrode-Based Endurable Flexible Perovskite Solar Cells

All‐Carbon‐Electrode‐Based Endurable Flexible Perovskite Solar Cells

An endurable all-carbon-electrode-based flexible perovskite solar cell is developed, employing graphene as front transparent electrode and carbon nanotubes as back electrode. All-carbon-electrode-based flexible perovskite solar cells with and without the spiro-OMeTAD (2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene) hole transport material show power conversion efficiencies of 11.8% and 8.3%, respectively. Moreover, flexible devices demonstrate outstanding bending durability and thermal stability.

[Full Paper]
Qiang Luo, He Ma, Qinzhi Hou, Yingxiang Li, Jing Ren, Xuezeng Dai, Zhibo Yao, Yu Zhou, Lichen Xiang, Huayun Du, Hongcai He, Ning Wang, Kaili Jiang, Hong Lin, Huaiwu Zhang, Zhanhu Guo
Adv. Funct. Mater., January 19, 2018, https://doi.org/10.1002/adfm.201706777 Read article

Diphenylamine-Substituted Carbazole-Based Hole Transporting Materials for Perovskite Solar Cells: Influence of Isomeric Derivatives

Diphenylamine‐Substituted Carbazole‐Based Hole Transporting Materials for Perovskite Solar Cells: Influence of Isomeric Derivatives

Branched hole transporting materials (HTMs), containing two diphenylamine substituted carbazole moieties linked by a nonconjugated fragment, are synthesized and tested in perovskite solar cells. They are synthesized by a simple two-step synthetic procedure providing target products in high yield. Testing in perovskite solar cells indicates that performance of new HTMs is on a par with Spiro-OMeTAD.

[Full Paper]
Artiom Magomedov, Sanghyun Paek, Paul Gratia, Ernestas Kasparavicius, Maryte Daskeviciene, Egidijus Kamarauskas, Alytis Gruodis, Vygintas Jankauskas, Kristina Kantminiene, Kyung Taek Cho, Kasparas Rakstys, Tadas Malinauskas, Vytautas Getautis, Mohammad Khaja Nazeeruddin
Adv. Funct. Mater., January 19, 2018, https://doi.org/10.1002/adfm.201704351 Read article

Molecular Design of Efficient Organic D–A–π –A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye-Sensitized Solar Cells

Molecular Design of Efficient Organic D–A–<math altimg=π –A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells" title="Molecular Design of Efficient Organic D–A–π –A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells" src="http://onlinelibrary.wiley.com/store/10.1002/cssc.201701949/asset/image_n/cssc201701949-toc-0001.png?v=1&s=f34ba8ccd0223740cf29ee78fda9b6fd114c134e"/>

A better class of donor: A metal-free organic sensitizer, suitable for the dye-sensitized solar cells (DSSCs), incorporating a triphenylamine segment and 4-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)benzoic acid as electron donor and acceptor part, respectively, has been synthesized and characterized. The influence of I3/I, [Co(bpy)3]3+/2+, and [Cu(tmby)2]2+/+ redox electrolytes on the DSSC device performance is investigated. The solar light to electrical energy conversion efficiency of the devices with [Cu(tmby)2]2+/+ reaches 7.15 %.

[Full Paper]
Parnian Ferdowsi, Yasemin Saygili, Weiwei Zhang, Tomas Edvinson, Ladislav Kavan, Javad Mokhtari, Shaik M. Zakeeruddin, Michael Grätzel, Anders Hagfeldt
ChemSusChem, January 17, 2018, https://doi.org/10.1002/cssc.201701949 Read article

Flash Infrared Annealing for Antisolvent-Free Highly Efficient Perovskite Solar Cells

Flash Infrared Annealing for Antisolvent‐Free Highly Efficient Perovskite Solar Cells

Flash infrared annealing (FIRA) is demonstrated as an antisolvent-free method to prepare methylammonium lead iodide perovskite solar cells with over 18% efficiency. FIRA enables the preparation of pinhole-free perovskite films with micrometer-size crystalline domains over a large area of both glass and plastic substrates. FIRA, as a rapid and environmentally friendly method to scale up perovskite solar cells is proposed.

[Full Paper]
Sandy Sanchez, Xiao Hua, Nga Phung, Ullrich Steiner, Antonio Abate
Adv. Energy Mater., January 17, 2018, https://doi.org/10.1002/aenm.201702915 Read article

Efficient Ternary Polymer Solar Cells with Two Well-Compatible Donors and One Ultranarrow Bandgap Nonfullerene Acceptor

Efficient Ternary Polymer Solar Cells with Two Well‐Compatible Donors and One Ultranarrow Bandgap Nonfullerene Acceptor

Highly efficient ternary nonfullerene polymer solar cells (PSCs) are fabricated by employing two well-compatible donors with complementary absorption spectra and one ultranarrow bandgap acceptor. The power conversion efficiency and short-circuit current density of ternary PSCs are simultaneously increased to 11.62% and 24.14 mA cm−2 by incorporating 20 wt% PTB7-Th due to the enhanced photon harvesting and optimized film morphology.

[Full Paper]
Xiaoling Ma, Yang Mi, Fujun Zhang, Qiaoshi An, Miao Zhang, Zhenghao Hu, Xinfeng Liu, Jian Zhang, Weihua Tang
Adv. Energy Mater., January 17, 2018, https://doi.org/10.1002/aenm.201702854 Read article

The Impact of Local Morphology on Organic Donor/Acceptor Charge Transfer States

The Impact of Local Morphology on Organic Donor/Acceptor Charge Transfer States

The local morphology at organic donor/acceptor interfaces has recently been shown to greatly influence charge transfer state energies and dynamics. This progress report summarizes some of the key discussions in recent literature concerning the role of local morphology in the charge transfer and charge generation process in organic photovoltaics, as well as the potential impact on device performance.

[Progress Report]
YunHui L. Lin, Michael A. Fusella, Barry P. Rand
Adv. Energy Mater., January 17, 2018, https://doi.org/10.1002/aenm.201702816 Read article

Carbon Nanoparticles in High-Performance Perovskite Solar Cells

Carbon Nanoparticles in High‐Performance Perovskite Solar Cells

Carbon nanoparticles are incorporated in perovskite solar cells as a degradation inhibitor and perovskite crystal size magnifier. Here, carbon nanoparticles are used with functional groups in the perovskite solution, which interact with formamidinium cations resulting in morphology tuning, increased hydrophobicity, and thermal stability.

[Communication]
Mozhgan Yavari, Mohammad Mazloum-Ardakani, Somayeh Gholipour, Nevena Marinova, Juan Luis Delgado, Silver-Hamill Turren-Cruz, Konrad Domanski, Nima Taghavinia, Michael Saliba, Michael Grätzel, Anders Hagfeldt, Wolfgang Tress
Adv. Energy Mater., January 17, 2018, https://doi.org/10.1002/aenm.201702719 Read article

Extending the Continuous Operating Lifetime of Perovskite Solar Cells with a Molybdenum Disulfide Hole Extraction Interlayer

Extending the Continuous Operating Lifetime of Perovskite Solar Cells with a Molybdenum Disulfide Hole Extraction Interlayer

Highly stable and efficient inverted planar perovskite solar cells are fabricated based on a molybdenum disulfide (MoS2) hole extraction interlayer. The performance improvement is attributed to improved hole extraction, while the enhancement in the long-term stability is attributed to the stabilization of the hole transporting materials/perovskite interface, inhibiting the bulk degradation process of the MAPbI3 structure itself.

[Full Paper]
George Kakavelakis, Ioannis Paradisanos, Barbara Paci, Amanda Generosi, Michael Papachatzakis, Temur Maksudov, Leyla Najafi, Antonio Esaú Del Rio Castillo, George Kioseoglou, Emmanuel Stratakis, Francesco Bonaccorso, Emmanuel Kymakis
Adv. Energy Mater., January 17, 2018, https://doi.org/10.1002/aenm.201702287 Read article

Molecular Consideration for Small Molecular Acceptors Based on Ladder-Type Dipyran: Influences of O-Functionalization and π-Bridges

Molecular Consideration for Small Molecular Acceptors Based on Ladder‐Type Dipyran: Influences of O‐Functionalization and π‐Bridges

Dipyran-based ladder-type building block (Ph-DTDP), which possesses two oxygen atoms in the conjugated skeleton and four flanking hexylphenyl side chains, is facilely synthesized. The corresponding acceptor–donor–acceptor-type nonfullerene acceptors are prepared and the influences of O-functionalization and π-bridges on energy levels, absorption spectra, crystalinity, morphologies, and photovoltaic performances are systematically studied.

[Full Paper]
Lisi Yang, Miao Li, Jinsheng Song, Yuanyuan Zhou, Zhishan Bo, Hua Wang
Adv. Funct. Mater., January 17, 2018, https://doi.org/10.1002/adfm.201705927 Read article

Self-Doping Fullerene Electrolyte-Based Electron Transport Layer for All-Room-Temperature-Processed High-Performance Flexible Polymer Solar Cells

Self‐Doping Fullerene Electrolyte‐Based Electron Transport Layer for All‐Room‐Temperature‐Processed High‐Performance Flexible Polymer Solar Cells

An n-type doping fullerene electrolyte (PCBB-3N-3I) with high-content doping groups, resulting in high conductivity and well-matched energy levels, is synthesized. The inverted polymer solar cells with PCBB-3N-3I electron transport layer show a record efficiency in the flexible polymer solar cells with an extremely high bending durability and thickness-insensitive photovoltaic behavior.

[Full Paper]
Jingwen Zhang, Rongming Xue, Guiying Xu, Weijie Chen, Guo-Qing Bian, Changan Wei, Yaowen Li, Yongfang Li
Adv. Funct. Mater., January 17, 2018, https://doi.org/10.1002/adfm.201705847 Read article

Octadecylamine-Functionalized Single-Walled Carbon Nanotubes for Facilitating the Formation of a Monolithic Perovskite Layer and Stable Solar Cells

Octadecylamine‐Functionalized Single‐Walled Carbon Nanotubes for Facilitating the Formation of a Monolithic Perovskite Layer and Stable Solar Cells

In situ deposition of a capping layer of octadecylamine functionalized single-walled carbon nanotubes onto the surface of perovskite films generates beneficial effects including improved perovskite grain size, reduced ion migration, and water repellency. Consequently, improved efficiency, stability, and reduced hysteresis of perovskite solar cells (PSCs) are achieved. This work demonstrates the potential of carbon nanotubes in enhancing the performance of PSCs.

[Full Paper]
Vincent Tiing Tiong, Ngoc Duy Pham, Teng Wang, Tianxiang Zhu, Xinluo Zhao, Yaohong Zhang, Qing Shen, John Bell, Linhua Hu, Songyuan Dai, Hongxia Wang
Adv. Funct. Mater., January 17, 2018, https://doi.org/10.1002/adfm.201705545 Read article

Humidity-Induced Degradation via Grain Boundaries of HC(NH2)2PbI3 Planar Perovskite Solar Cells

Humidity‐Induced Degradation via Grain Boundaries of HC(NH2)2PbI3 Planar Perovskite Solar Cells

Moisture-induced degradation of FAPbI3 perovskite is systematically investigated. A Kelvin probe force microscopy study reveals that the formation of nonperovskite phases initiates at the grain boundaries and the phase transition proceeds toward the grain interiors. A post-thermal treatment that removes chemical residues at the grain boundaries which effectively slows the degradation process is developed.

[Full Paper]
Jae Sung Yun, Jincheol Kim, Trevor Young, Robert J. Patterson, Dohyung Kim, Jan Seidel, Sean Lim, Martin A. Green, Shujuan Huang, Anita Ho-Baillie
Adv. Funct. Mater., January 17, 2018, https://doi.org/10.1002/adfm.201705363 Read article

Conformation Locking on Fused-Ring Electron Acceptor for High-Performance Nonfullerene Organic Solar Cells

Conformation Locking on Fused‐Ring Electron Acceptor for High‐Performance Nonfullerene Organic Solar Cells

Conformation locking by introducing alkyl chains onto central electron-donating building blocks has been explored on fused-ring electron acceptor for high-performance nonfullerene organic solar cells. PBDB-T:ITC6-IC based devices treated with suitable thermal annealing reveal a promising power conversion efficiency of 11.61% and an expected high VOC of 0.97 V with a small energy loss.

[Full Paper]
Zhuohan Zhang, Jiangsheng Yu, Xinxing Yin, Zhenghao Hu, Yufeng Jiang, Jia Sun, Jie Zhou, Fujun Zhang, Thomas P. Russell, Feng Liu, Weihua Tang
Adv. Funct. Mater., January 17, 2018, https://doi.org/10.1002/adfm.201705095 Read article

Synthesis, Properties, and Solar Cell Performance of Poly(4-(p-alkoxystyryl)thiazole)s

Synthesis, Properties, and Solar Cell Performance of Poly(4‐(p‐alkoxystyryl)thiazole)s

Poly(4-styrylthiazole)s exhibit optical properties comparable to their thiophene analogues, but provide ≈0.3 V higher open circuit voltages in photovoltaic cells, due to their stabilized frontier orbital levels.

[Full Paper]
Jakob Jäger, Sandra Schraff, Frank Pammer
Macromol. Chem. Phys., January 15, 2018, https://doi.org/10.1002/macp.201700496 Read article

Synthesis of Polypyrrole Inverse Opals through an Air–Water Interface Polymerization Method and Their Application in Dye-Sensitized Solar Cells

Synthesis of Polypyrrole Inverse Opals through an Air–Water Interface Polymerization Method and Their Application in Dye‐Sensitized Solar Cells

An air–water interface polymerization method is proposed for the fabrication of polypyrrole inverse opals without overlayers, during which colloidal crystals floating on pyrrole solution are employed as templates for the polymerization of pyrrole. The doped inverse opals could be applied as alternatives for the Pt counter-electrodes in dye-sensitized solar cells.

[Full Paper]
Liduo Deng, Likui Wang, Yunxing Li, Gang Shi, Yun Liu, Bolong Yao
Macromol. Chem. Phys., January 15, 2018, https://doi.org/10.1002/macp.201700489 Read article

Heterojunction Engineering for High Efficiency Cesium Formamidinium Double-Cation Lead Halide Perovskite Solar Cells

Heterojunction Engineering for High Efficiency Cesium Formamidinium Double‐Cation Lead Halide Perovskite Solar Cells

With or without PTAA: A p-type graded heterojunction (GHJ) structure is constructed by deploying a gradient distribution of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) in a shallow perovskite layer. The device based on this structure gives a power conversion efficiency of ≈20 %, significantly superior to that of the control planar cell (18.6 % efficiency), which is mainly because of the enhanced charge transfer and collection, and reduced interfacial trap states.

[Communication]
Yihui Wu, Peng Wang, Shubo Wang, Zenghua Wang, Bing Cai, Xiaojia Zheng, Yu Chen, Ningyi Yuan, Jianning Ding, Wen-Hua Zhang
ChemSusChem, January 15, 2018, https://doi.org/10.1002/cssc.201702221 Read article

Graphene-Based Inverted Planar Perovskite Solar Cells: Advancements, Fundamental Challenges, and Prospects

Graphene‐Based Inverted Planar Perovskite Solar Cells: Advancements, Fundamental Challenges, and Prospects

Turning previous work on its head: Metal halide based perovskite solar cells (PSCs) are considered among the most promising photovoltaic technologies (see figure). The high performance and low fabrication cost make this technology competitive with that of state-of-the-art thin-film photovoltaics, but there are still challenges to overcome. Progress within the last two years in the field of graphene-based inverted planar PSCs is summarized.

[Focus Review]
Konstantinos Petridis, George Kakavelakis, Minas M. Stylianakis, Emmanuel Kymakis
Chem. Asian J., January 15, 2018, https://doi.org/10.1002/asia.201701626 Read article

Photoactive Blend Morphology Engineering through Systematically Tuning Aggregation in All-Polymer Solar Cells

Photoactive Blend Morphology Engineering through Systematically Tuning Aggregation in All‐Polymer Solar Cells

The templating effects in morphology engineering by regulating aggregation are clearly demonstrated for the first time in all-polymer solar cells, where the morphology may be templated by the amorphous phase in one blend and by the semicrystalline phase in another, all dictated by the degree of polymer aggregation.

[Full Paper]
Gang Wang, Nicholas D. Eastham, Thomas J. Aldrich, Boran Ma, Eric F. Manley, Zhihua Chen, Lin X. Chen, Monica Olvera de la Cruz, Robert P. H. Chang, Ferdinand S. Melkonyan, Antonio Facchetti, Tobin J. Marks
Adv. Energy Mater., January 15, 2018, https://doi.org/10.1002/aenm.201702173 Read article

Fine-Tuning of Molecular Packing and Energy Level through Methyl Substitution Enabling Excellent Small Molecule Acceptors for Nonfullerene Polymer Solar Cells with Efficiency up to 12.54%

Fine‐Tuning of Molecular Packing and Energy Level through Methyl Substitution Enabling Excellent Small Molecule Acceptors for Nonfullerene Polymer Solar Cells with Efficiency up to 12.54%

A novel small molecule acceptor MeIC with a methylated end-capping group is developed. Compared to unmethylated counterparts (ITCPTC), MeIC exhibits higher LUMO level, tighter molecular packing, and better crystallites quality. The MeIC-based polymer solar cells with J71 as donor achieved high power conversion efficiency up to 12.54%, significantly higher than that of the device of ITCPTC.

[Communication]
Zhenghui Luo, Haijun Bin, Tao Liu, Zhi-Guo Zhang, Yankang Yang, Cheng Zhong, Beibei Qiu, Guanghao Li, Wei Gao, Dongjun Xie, Kailong Wu, Yanming Sun, Feng Liu, Yongfang Li, Chuluo Yang
Adv. Mater., January 15, 2018, https://doi.org/10.1002/adma.201706124 Read article

Fused Tris(thienothiophene)-Based Electron Acceptor with Strong Near-Infrared Absorption for High-Performance As-Cast Solar Cells

Fused Tris(thienothiophene)‐Based Electron Acceptor with Strong Near‐Infrared Absorption for High‐Performance As‐Cast Solar Cells

A fused tris(thienothiophene)-based electron acceptor with strong near-infrared absorption and high electron mobility is designed, synthesized, and applied in as-cast organic solar cells and as-cast semitransparent organic solar cells, which exhibit efficiencies of 12.0% and 10.3%, respectively.

[Communication]
Tengfei Li, Shuixing Dai, Zhifan Ke, Langxuan Yang, Jiayu Wang, Cenqi Yan, Wei Ma, Xiaowei Zhan
Adv. Mater., January 15, 2018, https://doi.org/10.1002/adma.201705969 Read article

High-Performance Organic Bulk-Heterojunction Solar Cells Based on Multiple-Donor or Multiple-Acceptor Components

High‐Performance Organic Bulk‐Heterojunction Solar Cells Based on Multiple‐Donor or Multiple‐Acceptor Components

This progress report provides an overview of the most impactful recent progress in high-performance organic solar cells based on multiple-donor (polymer/polymer, polymer/dye, and polymer/small molecule) or multiple-acceptor (fullerene/fullerene, fullerene/nonfullerene, and nonfullerene/nonfullerene) components, focusing particularly on the interactions between different components from the perspective of morphology and photophysics.

[Progress Report]
Wenchao Huang, Pei Cheng, Yang (Michael) Yang, Gang Li, Yang Yang
Adv. Mater., January 15, 2018, https://doi.org/10.1002/adma.201705706 Read article

Polymer-Passivated Inorganic Cesium Lead Mixed-Halide Perovskites for Stable and Efficient Solar Cells with High Open-Circuit Voltage over 1.3 V

Polymer‐Passivated Inorganic Cesium Lead Mixed‐Halide Perovskites for Stable and Efficient Solar Cells with High Open‐Circuit Voltage over 1.3 V

The interfacial properties between CsPbI2Br absorber and poly(3-hexylthiophene) (P3HT) hole-acceptor are improved by passivating the surface defects of CsPbI2Br and reducing the energy disorder of P3HT. Consequently, a stable inorganic perovskite solar cell with high power conversion efficiency of 12.02% and minimal energy loss of 0.50 eV is obtained.

[Communication]
Qingsen Zeng, Xiaoyu Zhang, Xiaolei Feng, Siyu Lu, Zhaolai Chen, Xue Yong, Simon A. T. Redfern, Haotong Wei, Haiyu Wang, Huaizhong Shen, Wei Zhang, Weitao Zheng, Hao Zhang, John S. Tse, Bai Yang
Adv. Mater., January 15, 2018, https://doi.org/10.1002/adma.201705393 Read article

Achieving a Record Fill Factor for Silicon–Organic Hybrid Heterojunction Solar Cells by Using a Full-Area Metal Polymer Nanocomposite Top Electrode

Achieving a Record Fill Factor for Silicon–Organic Hybrid Heterojunction Solar Cells by Using a Full‐Area Metal Polymer Nanocomposite Top Electrode

A novel modified nanocomposite electrode is designed to achieve a full-area carrier collection in Si/organic heterojunction solar cells. The carrier collection in both lateral and vertical directions as well as the carrier separation are boosted, resulting in a record fill factor of 80.21%. The finding suggests a strategy for the development of highly efficient solar cells with ideal carrier transport route.

[Full Paper]
Juye Zhu, Xi Yang, Zhenhai Yang, Dan Wang, Pingqi Gao, Jichun Ye
Adv. Funct. Mater., January 15, 2018, https://doi.org/10.1002/adfm.201705425 Read article

Alkyl Chain Regiochemistry of Benzotriazole-Based Donor Polymers Influencing Morphology and Performances of Non-Fullerene Organic Solar Cells

Alkyl Chain Regiochemistry of Benzotriazole‐Based Donor Polymers Influencing Morphology and Performances of Non‐Fullerene Organic Solar Cells

The effects of alkyl chain regiochemistry on the properties of donor polymers and the performance of non-fullerene organic solar cells are investigated. It is found that the alkyl chain regiochemistry has great impacts on the morphology features of the neat and blend films, and the PfBTAZS:O-IDTBR-based cells with small domain size can achieve a high efficiency of 10.4%.

[Communication]
Shangshang Chen, Lin Zhang, Chao Ma, Dong Meng, Jianquan Zhang, Guangye Zhang, Zhengke Li, Philip C. Y. Chow, Wei Ma, Zhaohui Wang, Kam Sing Wong, Harald Ade, He Yan
Adv. Energy Mater., January 10, 2018, https://doi.org/10.1002/aenm.201702427 Read article

Annealing-Free Cr2O3 Electron-Selective Layer for Efficient Hybrid Perovskite Solar Cells

Annealing‐Free Cr2O3 Electron‐Selective Layer for Efficient Hybrid Perovskite Solar Cells

Between the sheets: Amorphous dispersible chromium oxide (Cr2O3) nanosheets are synthesized by a facile solvothermal reaction. A planar hybrid perovskite solar cell based on the Cr2O3 electron-selective layer and Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3 light-absorption layer achieves a power conversion efficiency of 16.23 %, which is comparable with the device based on conventional high-temperature-calcined TiO2 electron-selective layer.

[Full Paper]
Jia Dong, Jihuai Wu, Jinbiao Jia, Xin He, Zhang Lan, Leqing Fan, Jianming Lin, Miaoliang Huang
ChemSusChem, January 09, 2018, https://doi.org/10.1002/cssc.201701864 Read article

Recent Progress in Ternary Organic Solar Cells Based on Nonfullerene Acceptors

Recent Progress in Ternary Organic Solar Cells Based on Nonfullerene Acceptors

Fullerene-free ternary organic solar cells integrating complementary absorptions are greatly inspired by the prosperous development of nonfullerene acceptors with their great performance and abundant varieties. This research news demonstrates the main functions of third components and some design guidelines for ternary composition and summarizes the recent advanced progress for high-performance ternary organic solar cells based on nonfullerene acceptors.

[Research News]
Runnan Yu, Huifeng Yao, Jianhui Hou
Adv. Energy Mater., January 09, 2018, https://doi.org/10.1002/aenm.201702814 Read article

High-Efficiency Polymer Homo-Tandem Solar Cells with Carbon Quantum-Dot-Doped Tunnel Junction Intermediate Layer

High‐Efficiency Polymer Homo‐Tandem Solar Cells with Carbon Quantum‐Dot‐Doped Tunnel Junction Intermediate Layer

High-efficiency homo-tandem solar cells with enhanced power conversion efficiency (PCE) are demonstrated by introducing carbon quantum dot (CQD)-doped PEI on a tunnel junction intermediate connection layer. The inclusion of CQDs in the PEI layer leads to improved electron extraction properties and better series connection. The best tandem solar cell fabricated with the CQD-doped PEI layer yields a PCE of 12.13%.

[Full Paper]
Rakwon Kang, Sujung Park, Yun Kyung Jung, Dong Chan Lim, Myung Joo Cha, Jung Hwa Seo, Shinuk Cho
Adv. Energy Mater., January 08, 2018, https://doi.org/10.1002/aenm.201702165 Read article

Spatially Resolved Insight into the Chemical and Electronic Structure of Solution-Processed Perovskites—Why to (Not) Worry about Pinholes

Spatially Resolved Insight into the Chemical and Electronic Structure of Solution‐Processed Perovskites—Why to (Not) Worry about Pinholes

Spatially resolved chemical and electronic structure investigations of CH3NH3PbI(3−x)Clx/TiO2 samples show an incomplete coverage and inhomogeneous properties. Varying likelihood of iodine oxidation and metallic lead formation, an excellent charge selectivity at the contact interfaces, and a large recombination barrier between electron and hole transport layer are found, minimizing negative pinhole effects.

[Full Paper]
Claudia Hartmann, Golnaz Sadoughi, Roberto Félix, Evelyn Handick, Hagen W. Klemm, Gina Peschel, Ewa Madej, Alexander B. Fuhrich, Xiaxia Liao, Simone Raoux, Daniel Abou-Ras, Dan Wargulski, Thomas Schmidt, Regan G. Wilks, Henry Snaith, Marcus Bär
Adv. Mater. Interfaces, January 08, 2018, https://doi.org/10.1002/admi.201701420 Read article

Diketopyrrolopyrrole-Based and Tetracyano-Bridged Small Molecules for Bulk Heterojunction Organic Solar Cells

Diketopyrrolopyrrole‐Based and Tetracyano‐Bridged Small Molecules for Bulk Heterojunction Organic Solar Cells

Bridging the gaps: Design strategies for the development of diketopyrrolopyrrole (DPP)-based and tetracyano-bridged molecular architectures are highlighted. Important structural changes in donors and acceptors and their impact on device performance are also discussed. Tetracyanobutadiene-bridged small molecules are also explored as acceptors for bulk heterojunction organic solar cells.

[Focus Review]
Yuvraj Patil, Rajneesh Misra
Chem. Asian J., January 05, 2018, https://doi.org/10.1002/asia.201701493 Read article

Si-Doped Cu(In,Ga)Se2 Photovoltaic Devices with Energy Conversion Efficiencies Exceeding 16.5% without a Buffer Layer

Si‐Doped Cu(In,Ga)Se2 Photovoltaic Devices with Energy Conversion Efficiencies Exceeding 16.5% without a Buffer Layer

Buffer-free simplified structure chalcogenide thin film solar cells with high efficiencies over 16.5% are demonstrated using novel Cu(In,Ga)Se2 (CIGS) photoabsorber layers grown with Si-doping. Heat–light soaking treatments boost device performance regardless of the use of buffer layers, implying that the light-induced metastable phenomena in CIGS devices originate from bulk CIGS rather than buffer layers or the CIGS/buffer interface.

[Communication]
Shogo Ishizuka, Jiro Nishinaga, Masayuki Iioka, Hirofumi Higuchi, Yukiko Kamikawa, Takashi Koida, Hajime Shibata, Paul Fons
Adv. Energy Mater., January 05, 2018, https://doi.org/10.1002/aenm.201702391 Read article

Indaceno-Based Conjugated Polymers for Polymer Solar Cells

Indaceno‐Based Conjugated Polymers for Polymer Solar Cells

Indaceno-based conjugated polymers have provided numerous possibilities in the field of organic electronics, especially for polymer solar cells. Recent years have presented tremendous progress, with power conversion efficiencies of more than 11%. In this review, recent developments of the indaceno-based conjugated polymers are summarized by categorizing them into four areas.

[Review]
Yuli Yin, Yong Zhang, Liancheng Zhao
Macromol. Rapid Commun., January 04, 2018, https://doi.org/10.1002/marc.201700697 Read article

Kinetically Controlled Growth of Phase-Pure SnS Absorbers for Thin Film Solar Cells: Achieving Efficiency Near 3% with Long-Term Stability Using an SnS/CdS Heterojunction

Kinetically Controlled Growth of Phase‐Pure SnS Absorbers for Thin Film Solar Cells: Achieving Efficiency Near 3% with Long‐Term Stability Using an SnS/CdS Heterojunction

Facile control on morphology of phase pure tin monosulfide (SnS) thin films is enabled by controlling the growth kinetics in vapor transport deposition. Dense and flat surface morphology of cube-like orthorhombic SnS combined with the minimized pinholes directly leads to improved diode quality and increased shunt resistance of the SnS/CdS heterojunction, achieving the certified efficiency of 2.938%.

[Communication]
Dongha Lim, Hoyoung Suh, Mahesh Suryawanshi, Gwang Yeom Song, Jae Yu Cho, Jin Hyeok Kim, Jae Hyuck Jang, Chan-Wook Jeon, Ara Cho, SeJin Ahn, Jaeyeong Heo
Adv. Energy Mater., January 03, 2018, https://doi.org/10.1002/aenm.201702605 Read article

Design and Synthesis of a Novel n-Type Polymer Based on Asymmetric Rylene Diimide for the Application in All-Polymer Solar Cells

Design and Synthesis of a Novel n‐Type Polymer Based on Asymmetric Rylene Diimide for the Application in All‐Polymer Solar Cells

The first n-type polymer based on the asymmetric rylene diimide is designed and synthesized. PTDI-T could realize a power conversion efficiency of 4.70% by using PTB7-Th as a donor polymer, which is obviously higher than those of the analogue polymers of PPDI-2T and PDTCDI.

[Communication]
Jing Yang, Fan Chen, Huijuan Ran, Jian-Yong Hu, Bo Xiao, Ailing Tang, Xiaochen Wang, Erjun Zhou
Macromol. Rapid Commun., January 02, 2018, https://doi.org/10.1002/marc.201700715 Read article

Corrugation Architecture Enabled Ultraflexible Wafer-Scale High-Efficiency Monocrystalline Silicon Solar Cell

Corrugation Architecture Enabled Ultraflexible Wafer‐Scale High‐Efficiency Monocrystalline Silicon Solar Cell

A corrugation architecture enabled ultraflexible, high performance crystalline-silicon solar cell on a 5 inch wafer via a lithography-less, complementary metal oxide semiconductor compatible technique, shows power conversion efficiency of 17.2%, a bending radius lower than 140 µm with the groove width of 0.86 mm, and a high mechanical stability over 1000 cyclic bending.

[Full Paper]
Rabab R. Bahabry, Arwa T. Kutbee, Sherjeel M. Khan, Adrian C. Sepulveda, Irmandy Wicaksono, Maha Nour, Nimer Wehbe, Amani S. Almislem, Mohamed T. Ghoneim, Galo A. Torres Sevilla, Ahad Syed, Sohail F. Shaikh, Muhammad M. Hussain
Adv. Energy Mater., January 02, 2018, https://doi.org/10.1002/aenm.201702221 Read article

Roles of Polymer Layer in Enhanced Photovoltaic Performance of Perovskite Solar Cells via Interface Engineering

Roles of Polymer Layer in Enhanced Photovoltaic Performance of Perovskite Solar Cells via Interface Engineering

Enhanced surface quality of perovskite photoactive layer is demonstrated by incorporation of the poly(methyl methacrylate) (PMMA) engineered passivating layer, which results in highly enhanced power conversion efficiency from 16.8 to 20.4% of standard and PMMA-incorporated perovskite solar cells, respectively, and reveals the working mechanism of PMMA layer in the perovskite solar cell device.

[Full Paper]
Fengjiu Yang, Hong En Lim, Feijiu Wang, Masashi Ozaki, Ai Shimazaki, Jiewei Liu, Nur Baizura Mohamed, Keisuke Shinokita, Yuhei Miyauchi, Atsushi Wakamiya, Yasujiro Murata, Kazunari Matsuda
Adv. Mater. Interfaces, December 21, 2017, https://doi.org/10.1002/admi.201701256 Read article

Pyran-Bridged Indacenodithiophene as a Building Block for Constructing Efficient A–D–A-Type Nonfullerene Acceptors for Polymer Solar Cells

Pyran‐Bridged Indacenodithiophene as a Building Block for Constructing Efficient A–D–A‐Type Nonfullerene Acceptors for Polymer Solar Cells

Single ladders (put a rung on it): The ladder-type molecule pyran-bridged indacenodithiophene (PDT) is used to construct a nonfullerene acceptor (PTIC) for polymer solar cells (PSCs). The central structure of PDT exhibits an ordered molecular packing in the crystal. The introduction of oxygen increases the HOMO level and expands the absorption. One such PSC device, based on PBDB-T:PTIC, gives a power conversion efficiency of 7.66 %.

[Full Paper]
Shuguang Wen, Yao Wu, Yingying Wang, Yi Li, Ling Liu, Huanxiang Jiang, Zhitian Liu, Renqiang Yang
ChemSusChem, December 19, 2017, https://doi.org/10.1002/cssc.201701917 Read article

New n-Type Solution Processable All Conjugated Polymer Network: Synthesis, Optoelectronic Characterization, and Application in Organic Solar Cells

New n‐Type Solution Processable All Conjugated Polymer Network: Synthesis, Optoelectronic Characterization, and Application in Organic Solar Cells

A new solution-processable n-type conjugated polymer network (PNT1) is synthesized through a palladium-catalyzed Stille cross-coupling reaction following the A3 + B2 synthetic approach. PTN1 is employed as electron acceptor in solution processed bulk heterojunction organic solar cells, demonstrating the use of polymer networks in optoelectronic applications.

[Communication]
Hakan Bildirir, Dario Di Carlo Rasi, Martijn M. Wienk, René A. J. Janssen, Apostolos Avgeropoulos, Vasilis G. Gregoriou, Sybille Allard, Ullrich Scherf, Christos L. Chochos
Macromol. Rapid Commun., December 18, 2017, https://doi.org/10.1002/marc.201700629 Read article

The 3 D Structure of Twisted Benzo[ghi]perylene-Triimide Dimer as a Non-Fullerene Acceptor for Inverted Perovskite Solar Cells

The 3 D Structure of Twisted Benzo[ghi]perylene‐Triimide Dimer as a Non‐Fullerene Acceptor for Inverted Perovskite Solar Cells

Twisted layer: The new 3 D structured molecule based on a benzo[ghi]-perylenetriimide (BPTI) is an effective non-fullerene electron acceptor for solution-processable perovskite solar cells. The solar cell device with double electron-transport layer (ETL) material exhibits a notable power conversion efficiency of 11.63 %.

[Full Paper]
Priyadharsini Karuppuswamy, Hung-Cheng Chen, Pen-Cheng Wang, Chao-Ping Hsu, Ken-Tsung Wong, Chih-Wei Chu
ChemSusChem, December 12, 2017, https://doi.org/10.1002/cssc.201701827 Read article

Tiling of Solar Cell Surfaces: Influence on Photon Management and Microstructure

Tiling of Solar Cell Surfaces: Influence on Photon Management and Microstructure

Solar cells prepared on different tiled surfaces are compared in terms of photon management and microstructure. The better tiled surfaces are proposed for the enhancement of the photon management in the solar cells.

[Full Paper]
Asman Tamang, Hitoshi Sai, Vladislav Jovanov, Koji Matsubara, Dietmar Knipp
Adv. Mater. Interfaces, December 11, 2017, https://doi.org/10.1002/admi.201700814 Read article

Reducing Trap-Assisted Recombination in Small Organic Molecule-Based Photovoltaics by the Addition of a Conjugated Block Copolymer

Reducing Trap‐Assisted Recombination in Small Organic Molecule‐Based Photovoltaics by the Addition of a Conjugated Block Copolymer

The performance of small-molecule-based organic photovoltaics is greatly improved by the addition of a conjugated block copolymer composed of difluoroquinoxaline and thienopyrrolodione blocks (D130). It is revealed that the addition of D130 significantly reduced the trap density of the device. In addition, the photostability of the device is significantly enhanced by the incorporation of D130.

[Communication]
Kyuwan Cho, Jinseck Kim, So Yeon Yoon, Ka Yeon Ryu, Song-Rim Jang, Bogyu Lim, Kyungkon Kim
Macromol. Rapid Commun., December 08, 2017, https://doi.org/10.1002/marc.201700630 Read article

Passivation of Interfaces in Thin Film Solar Cells: Understanding the Effects of a Nanostructured Rear Point Contact Layer

Passivation of Interfaces in Thin Film Solar Cells: Understanding the Effects of a Nanostructured Rear Point Contact Layer

In this work ultrathin 350 nm Cu(In,Ga)Se2 (CIGS) solar cells with passivated rear contact are studied and characterized. The rear interface passivation is achieved using an Al2O3 nanopatterned point structure and an average power conversion efficiency close to 10% is achieved due to chemical passivation and increased light trapping.

[Full Paper]
Pedro M. P. Salomé, Bart Vermang, Rodrigo Ribeiro-Andrade, Jennifer P. Teixeira, José M. V. Cunha, Manuel J. Mendes, Sirazul Haque, Jêrome Borme, Hugo Águas, Elvira Fortunato, Rodrigo Martins, Juan C. González, Joaquim P. Leitão, Paulo A. Fernandes, Marika Edoff, Sascha Sadewasser
Adv. Mater. Interfaces, December 05, 2017, https://doi.org/10.1002/admi.201701101 Read article

Multifunctional Diketopyrrolopyrrole-Based Conjugated Polymers with Perylene Bisimide Side Chains

Multifunctional Diketopyrrolopyrrole‐Based Conjugated Polymers with Perylene Bisimide Side Chains

Electron-deficient perylene bisimide linked by flexible alkyl side chains makes the diketopyrrolopyrrole-based conjugated polymers can be used as electron donor, electron acceptor, and single-component material in organic solar cells.

[Communication]
Cheng Li, Changshi Yu, Wenbin Lai, Shijie Liang, Xudong Jiang, Guitao Feng, Jianqi Zhang, Yunhua Xu, Weiwei Li
Macromol. Rapid Commun., November 24, 2017, https://doi.org/10.1002/marc.201700611 Read article

Broadening the Photoresponse to Near-Infrared Region by Cooperating Fullerene and Nonfullerene Acceptors for High Performance Ternary Polymer Solar Cells

Broadening the Photoresponse to Near‐Infrared Region by Cooperating Fullerene and Nonfullerene Acceptors for High Performance Ternary Polymer Solar Cells

Efficient ternary polymer solar cells are demonstrated by cooperating fullerene and nonfullerene acceptors to extend the photoresponse to the near-infrared region. A promising power conversion efficiency of 10.51% is achieved for ternary PSCs-based PBDTBDD:PC71BM:IEICO.

[Communication]
Jinyan Li, Hao Liu, Zhaoyang Wang, Yiming Bai, Lin Liu, Fuzhi Wang, Tasawar Hayat, Ahmed Alsaedi, Zhan'ao Tan
Macromol. Rapid Commun., November 24, 2017, https://doi.org/10.1002/marc.201700492 Read article

Recent Advances in Nonfullerene Acceptors for Organic Solar Cells

Recent Advances in Nonfullerene Acceptors for Organic Solar Cells

In this review, recent research progress on nonfullerene acceptors, including small molecules and polymers, are sorted and summarized on the basis of their different characteristics.

[Review]
Fuchuan Liu, Tianyu Hou, Xiangfei Xu, Liya Sun, Jiawang Zhou, Xingang Zhao, Shiming Zhang
Macromol. Rapid Commun., November 20, 2017, https://doi.org/10.1002/marc.201700555 Read article

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