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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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Sn- and Pd-Free Synthesis of D–π–A Organic Sensitizers for Dye-Sensitized Solar Cells by Cu-Catalyzed Direct Arylation

Sn‐ and Pd‐Free Synthesis of D–π–A Organic Sensitizers for Dye‐Sensitized Solar Cells by Cu‐Catalyzed Direct Arylation

Prepare to dye: A variety of D–π–A-type functional organic dyes are facilely synthesized by direct C−H arylation catalyzed by inexpensive copper salts with broad substrate scope and good functional group compatibility. Three new dye sensitizers are fabricated for use in dye-sensitized solar cells (DSSCs), representing the first use of Cu-catalyzed C−H arylation for a step-saving, Sn-free synthesis of precursor dyes for DSSC applications.

[Full Paper]
Jiung-Huai Huang, Po-Han Lin, Wei-Ming Li, Kun-Mu Lee, Ching-Yuan Liu
ChemSusChem, April 21, 2017, https://doi.org/10.1002/cssc.201700421 Read article

Suppressing Energy Loss due to Triplet Exciton Formation in Organic Solar Cells: The Role of Chemical Structures and Molecular Packing

Suppressing Energy Loss due to Triplet Exciton Formation in Organic Solar Cells: The Role of Chemical Structures and Molecular Packing

In many polymer–fullerene bulk heterojunction solar cells, triplet exciton formation on the polymer chains has been identified as a major energy loss channel. Here, an integrated multiscale theoretical approach is used to establish detailed relationships among chemical structures, molecular packing, and nonradiative recombination loss mediated by the lowest-energy charge-transfer states with either singlet or triplet spin character.

[Communication]
Xian-Kai Chen, Tonghui Wang, Jean-Luc Brédas
Adv. Energy Mater., April 21, 2017, https://doi.org/10.1002/aenm.201602713 Read article

Stable and Highly Efficient PbS Quantum Dot Tandem Solar Cells Employing a Rationally Designed Recombination Layer

Stable and Highly Efficient PbS Quantum Dot Tandem Solar Cells Employing a Rationally Designed Recombination Layer

Air-stable PbS colloidal quantum dot (CQD) tandem solar cells with a power conversion efficiency approaching 9% and a recorded-high open-circuit voltage of 1.13 V are demonstrated. By rationally designing the recombination layers, air stable, solution-processed, highly efficient CQD tandem devices with simplified structure are successfully realized.

[Full Paper]
Guozheng Shi, Yongjie Wang, Zeke Liu, Lu Han, Jie Liu, Yakun Wang, Kunyuan Lu, Si Chen, Xufeng Ling, Yong Li, Si Cheng, Wanli Ma
Adv. Energy Mater., April 21, 2017, https://doi.org/10.1002/aenm.201602667 Read article

Tuning Energy Levels without Negatively Affecting Morphology: A Promising Approach to Achieving Optimal Energetic Match and Efficient Nonfullerene Polymer Solar Cells

Tuning Energy Levels without Negatively Affecting Morphology: A Promising Approach to Achieving Optimal Energetic Match and Efficient Nonfullerene Polymer Solar Cells

A terthiophene-based donor polymer PffBTBX-T3 with the D–A1–D–A2 structure is demonstrated and compared with the other two D–A-type polymers PffBT-T3 and PffBX-T3. While the energy levels of three polymers are fine-tuned, their optical and morphological pro­perties are not dramatically changed. The optimal energetic match and well-controlled morphology enable 9.0% effi­cient nonfullerene devices based on PffBTBX-T3 and ITIC-Th.

[Communication]
Jianquan Zhang, Kui Jiang, Guofang Yang, Tingxuan Ma, Jing Liu, Zhengke Li, Joshua Yuk Lin Lai, Wei Ma, He Yan
Adv. Energy Mater., April 21, 2017, https://doi.org/10.1002/aenm.201602119 Read article

A Printable Organic Electron Transport Layer for Low-Temperature-Processed, Hysteresis-Free, and Stable Planar Perovskite Solar Cells

A Printable Organic Electron Transport Layer for Low‐Temperature‐Processed, Hysteresis‐Free, and Stable Planar Perovskite Solar Cells

An innovative method for achieving printable planar heterojunction perovskite solar cells (PSCs) is demonstrated using self-assembled organic nanocomposites of fullerene derivatives and cationic polyelectrolytes as the electron transport layer. Highly reliable and stable PSCs with low-temperature solution-processable organic nanocomposites exhibit stabilized power conversion efficiencies exceeding 18%.

[Communication]
Jinho Lee, Junghwan Kim, Chang-Lyoul Lee, Geunjin Kim, Tae Kyun Kim, Hyungcheol Back, Suhyun Jung, Kilho Yu, Soonil Hong, Seongyu Lee, Seok Kim, Soyeong Jeong, Hongkyu Kang, Kwanghee Lee
Adv. Energy Mater., April 20, 2017, https://doi.org/10.1002/aenm.201700226 Read article

Thieno[3,4-c]Pyrrole-4,6-Dione-Based Polymer Acceptors for High Open-Circuit Voltage All-Polymer Solar Cells

Thieno[3,4‐c]Pyrrole‐4,6‐Dione‐Based Polymer Acceptors for High Open‐Circuit Voltage All‐Polymer Solar Cells

Alternating π-conjugated polymers composed of electron-deficient thieno[3,4-c]pyrrole-4,6-dione (TPD) and 3,4-difluorothiophene ([2F]T) motifs are proving relevant as fullerene alternatives for “all-polymer” bulk heterojunction (BHJ) solar cells. When a third electron-deficient motif, namely 2,1,3-benzothiadiazole (BT), is inserted in the main chain, the corresponding polymer (P2TPDBT[2F]T) yields a twofold increase in BHJ device efficiency.

[Full Paper]
Shengjian Liu, Xin Song, Simil Thomas, Zhipeng Kan, Federico Cruciani, Frédéric Laquai, Jean-Luc Bredas, Pierre M. Beaujuge
Adv. Energy Mater., April 20, 2017, https://doi.org/10.1002/aenm.201602574 Read article

Efficient Perovskite Solar Cells Based on a Solution Processable Nickel(II) Phthalocyanine and Vanadium Oxide Integrated Hole Transport Layer

Efficient Perovskite Solar Cells Based on a Solution Processable Nickel(II) Phthalocyanine and Vanadium Oxide Integrated Hole Transport Layer

A perovskite solar cell containing a NiPc-(OBu)8 and V2O5 based organic–inorganic integrated hole transport layer is reported. It achieves a power conversion efficiency of 17.6%.

[Full Paper]
Ming Cheng, Yuanyuan Li, Majid Safdari, Cheng Chen, Peng Liu, Lars Kloo, Licheng Sun
Adv. Energy Mater., April 20, 2017, https://doi.org/10.1002/aenm.201602556 Read article

Earth-Abundant Chalcogenide Photovoltaic Devices with over 5% Efficiency Based on a Cu2BaSn(S,Se)4 Absorber

Earth‐Abundant Chalcogenide Photovoltaic Devices with over 5% Efficiency Based on a Cu2BaSn(S,Se)4 Absorber

By incorporating Se in a pure sulfide film, earth-abundant Cu2BaSnS4xSex (x = 3) films with 1.55 eV bandgap, a near perfect match for single-junction photovoltaic (PV) devices operating under AM 1.5G solar radiation, are successfully achieved. Sharp cut-offs in the external quantum efficiency data and photoluminescence features confirm the relative absence of band tailing in the Cu2BaSnS4−xSex system. A Cu2BaSnS4−xSex-based PV device with total area 0.425 cm2 exhibits a power conversion efficiency of 5.2%.

[Communication]
Donghyeop Shin, Tong Zhu, Xuan Huang, Oki Gunawan, Volker Blum, David B. Mitzi
Adv. Mater., April 20, 2017, https://doi.org/10.1002/adma.201606945 Read article

Cover Picture: Ligand-Free Copper-Catalyzed Cyano- and Alkynylstannylation of Arynes (ChemistrySelect 11/2017)

Cover Picture: Ligand‐Free Copper‐Catalyzed Cyano‐ and Alkynylstannylation of Arynes (ChemistrySelect 11/2017)

The cover picture shows that a variety of synthetically valuable compounds (gold) are accessible straightforwardly by the copper-catalyzed cyano- and alkynylstannylation of arynes. Despite the transient character, a strained carbon–carbon triple bond of arynes is selectively inserted into a C(sp)–Sn bond of a tin cyanide or alkynylstannanes to give ortho-cyanated or -alkynylated arylstannanes in high yield. The other features of the picture are that widely available copper cyanide efficaciously catalyzes these stannylations without any added supporting ligands, and that the resulting alkynylstannylated products can be converted into biologically active molecules and a dye for dye-sensitized solar cells. More information can be found in the Communication by Yoshida et al. (DOI: 10.1002/slct.201700297).

[Cover Picture]
Hiroto Yoshida, Teruhiko Kubo, Hitoshi Kuriki, Itaru Osaka, Ken Takaki, Yousuke Ooyama
ChemistrySelect, April 19, 2017, https://doi.org/10.1002/slct.201700706 Read article

Effect of Isomeric Structures on Photovoltaic Performance of D–A Copolymers

Effect of Isomeric Structures on Photovoltaic Performance of D–A Copolymers

The effect of isomeric structures on photovoltaic performance is studied. PBDTiBTTP solar cells present less charge recombination, giving a higher power conversion efficiency (PCE) of 6.51% with much higher short-circuit current (Jsc) and fill factor (FF).

[Communication]
Fangyuan Xie, Dan He, Han Pan, Jiaxing Jiang, Liming Ding
Macromol. Rapid Commun., April 19, 2017, https://doi.org/10.1002/marc.201700074 Read article

Low-Temperature Plasma Processing of Platinum Porphyrins for the Development of Metal Nanostructured Layers

Low‐Temperature Plasma Processing of Platinum Porphyrins for the Development of Metal Nanostructured Layers

A low-temperature approach for the development of tunable optical filters and platinum nanoelectrodes is presented. The fabrication is carried out by vacuum and plasma processing of the platinum octaethylporphyrin precursor. Nanostructured counterelectrodes have been tested within an excitonic solar cell demonstrating a superior catalytic performance.

[Full Paper]
Alejandro Nicolas Filippin, Juan Ramon Sanchez-Valencia, Jesús Idígoras, Manuel Macias-Montero, Maria Alcaire, Francisco Javier Aparicio, Juan Pedro Espinos, Carmen Lopez-Santos, Fabian Frutos, Angel Barranco, Juan Antonio Anta, Ana Borras
Adv. Mater. Interfaces, April 19, 2017, https://doi.org/10.1002/admi.201601233 Read article

300% Enhancement of Carrier Mobility in Uniaxial-Oriented Perovskite Films Formed by Topotactic-Oriented Attachment

300% Enhancement of Carrier Mobility in Uniaxial‐Oriented Perovskite Films Formed by Topotactic‐Oriented Attachment

A facile topotactic-oriented attachment process can produce uniaxial-oriented perovskite thin films with micrometer-grain morphology, high crystallinity, low trap density (≈4 × 1014 cm−3), and fast 9 GHz charge-carrier mobility (71 cm2 V−1 s−1). The n-i-p planar perovskite solar cell exhibits a power conversion efficiency of 19.7% (with stabilized efficiency output of 19.0%).

[Communication]
Dong Hoe Kim, Jaehong Park, Zhen Li, Mengjin Yang, Ji-Sang Park, Ik Jae Park, Jin Young Kim, Joseph J. Berry, Garry Rumbles, Kai Zhu
Adv. Mater., April 18, 2017, https://doi.org/10.1002/adma.201606831 Read article

Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells

Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells

A simple methylamine solution-based additive to improve film quality with nearly an order of magnitude reduction in intrinsic defects concentration is reported, and the relevant perovskite solar cells achieve a champion power conversion efficiency of 20.02% with a stabilized output efficiency of 19.01% under one sun illumination.

[Communication]
Zonghao Liu, Junnan Hu, Haoyang Jiao, Liang Li, Guanhaojie Zheng, Yihua Chen, Yuan Huang, Qing Zhang, Chao Shen, Qi Chen, Huanping Zhou
Adv. Mater., April 18, 2017, https://doi.org/10.1002/adma.201606774 Read article

Designing Squaraines to Control Charge Injection and Recombination Processes in NiO-based Dye-Sensitized Solar Cells

Designing Squaraines to Control Charge Injection and Recombination Processes in NiO‐based Dye‐Sensitized Solar Cells

Symmetry matters: New squaraine sensitizers (SQs) for NiO p-type dye-sensitized solar cells (DSSCs) are presented. By changing their symmetry and number of anchoring groups, the impact on the charge injection/recombination properties of the device is exerted, as proven by electrochemical impedance spectroscopy. Additionally, tandem DSSCs, which show a panchromatic light-harvesting ranging from 300 to ∼750 nm are also presented.

[Full Paper]
Oliver Langmar, Davide Saccone, Anna Amat, Simona Fantacci, Guido Viscardi, Claudia Barolo, Rubén D. Costa, Dirk M. Guldi
ChemSusChem, April 13, 2017, https://doi.org/10.1002/cssc.201700152 Read article

Trap-State Suppression and Improved Charge Transport in PbS Quantum Dot Solar Cells with Synergistic Mixed-Ligand Treatments

Trap‐State Suppression and Improved Charge Transport in PbS Quantum Dot Solar Cells with Synergistic Mixed‐Ligand Treatments

A mixed-ligand treatment for the fabrication of lead sulphide colloidal quantum dot solar cells is demonstrated. The mixed-ligand treatment facilitates the advantages of both organic (3-mercaptopropionic acid) and inorganic (zinc iodide) ligands to improve charge transport and trap passivation leading to a power conversion efficiency of 9.92% at a VOC of 0.66 V.

[Communication]
Santanu Pradhan, Alexandros Stavrinadis, Shuchi Gupta, Yu Bi, Francesco Di Stasio, Gerasimos Konstantatos
Small, April 12, 2017, https://doi.org/10.1002/smll.201700598 Read article

Amino-Acid-Induced Preferential Orientation of Perovskite Crystals for Enhancing Interfacial Charge Transfer and Photovoltaic Performance

Amino‐Acid‐Induced Preferential Orientation of Perovskite Crystals for Enhancing Interfacial Charge Transfer and Photovoltaic Performance

The (110) plane of CH3NH3PbI3 crystallites adjacent to the amino-acid-modified TiO2 surface tends to align in the direciton perpendicular to the TiO2 surface. Such crystalline orientation significantly enhances charge transfer efficiency at the TiO2/CH3NH3PbI3 interface and greatly improves the photovotaic performance of perovskite solar cells.

[Full Paper]
Yen-Chen Shih, Yu-Bing Lan, Chia-Shuo Li, Hsiao-Chi Hsieh, Leeyih Wang, Chih-I Wu, King-Fu Lin
Small, April 12, 2017, https://doi.org/10.1002/smll.201604305 Read article

Enhancing Performance of Large-Area Organic Solar Cells with Thick Film via Ternary Strategy

Enhancing Performance of Large‐Area Organic Solar Cells with Thick Film via Ternary Strategy

To achieve commercialization of organic solar cells, high thickness tolerability must be obtained and chlorinated solvents must be replaced. This study demonstrates an active layer with 270 nm thickness exhibits a power conversion efficiency of 10.78% using o-xylene as processing solvent. Large-area devices are successfully fabricated using polyethylene terephthalate-based transparent flexible substrate.

[Communication]
Jianqi Zhang, Yifan Zhao, Jin Fang, Liu Yuan, Benzheng Xia, Guodong Wang, Zaiyu Wang, Yajie Zhang, Wei Ma, Wei Yan, Wenming Su, Zhixiang Wei
Small, April 11, 2017, https://doi.org/10.1002/smll.201700388 Read article

Efficient and Stable Vacuum-Free-Processed Perovskite Solar Cells Enabled by a Robust Solution-Processed Hole Transport Layer

Efficient and Stable Vacuum‐Free‐Processed Perovskite Solar Cells Enabled by a Robust Solution‐Processed Hole Transport Layer

No vacuum needed: We report the use of a solution-processed Mo(tfd-COCF3)3-doped PEDOT film as hole transport layer for achieving high-performance and stable hybrid perovskite solar cells prepared by vacuum-free processing.

[Full Paper]
Chih-Yu Chang, Bo-Chou Tsai, Yu-Cheng Hsiao
ChemSusChem, April 11, 2017, https://doi.org/10.1002/cssc.201700340 Read article

Application of Azulene in Constructing Organic Optoelectronic Materials: New Tricks for an Old Dog

Application of Azulene in Constructing Organic Optoelectronic Materials: New Tricks for an Old Dog

Aromatic notes: The general strategies and representative synthetic methods for the preparation and functionalization of azulene and its derivatives are presented in this Minireview to give valuable insights into the development of azulene-based optoelectronic materials (see figure). The application of azulene-based conjugated molecules/polymers in organic field-effect transistors and solar cells is also discussed.

[Minireview]
Hanshen Xin, Xike Gao
ChemPlusChem, April 11, 2017, https://doi.org/10.1002/cplu.201700039 Read article

High-Performance Long-Term-Stable Dopant-Free Perovskite Solar Cells and Additive-Free Organic Solar Cells by Employing Newly Designed Multirole π-Conjugated Polymers

High‐Performance Long‐Term‐Stable Dopant‐Free Perovskite Solar Cells and Additive‐Free Organic Solar Cells by Employing Newly Designed Multirole π‐Conjugated Polymers

New multirole π-conjugated polymers are developed via a rational design approach through theoretical hindsight, further successfully subjecting them into dopant-free perovskite solar cells as hole-transporting materials with high power conversion efficiency (PCE) of 17.28%, and additive-free organic solar cells as photoactive donors with high PCE of 8.26%.

[Communication]
Kakaraparthi Kranthiraja, Kumarasamy Gunasekar, Hyunji Kim, An-Na Cho, Nam-Gyu Park, Seonha Kim, Bumjoon J. Kim, Ryosuke Nishikubo, Akinori Saeki, Myungkwan Song, Sung-Ho Jin
Adv. Mater., April 10, 2017, https://doi.org/10.1002/adma.201700183 Read article

Achieving Large-Area Planar Perovskite Solar Cells by Introducing an Interfacial Compatibilizer

Achieving Large‐Area Planar Perovskite Solar Cells by Introducing an Interfacial Compatibilizer

Large-area planar perovskite solar cells (PSCs) are demonstrated by an innovative method using an amphiphilic conjugated polyelectrolyte as an interfacial compatibilizer between the hydrophobic organic charge-transport layer and hydrophilic perovskite layer. Highly scalable PSCs with uniform perovskite films on large-area substrate (18.4 cm2) and active area of 1 cm2 exhibit stabilized power conversion efficiencies of 17%.

[Communication]
Jinho Lee, Hongkyu Kang, Geunjin Kim, Hyungcheol Back, Junghwan Kim, Soonil Hong, Byoungwook Park, Eunhag Lee, Kwanghee Lee
Adv. Mater., April 10, 2017, https://doi.org/10.1002/adma.201606363 Read article

Rational Engineering of BODIPY-Bridged Trisindole Derivatives for Solar Cell Applications

Rational Engineering of BODIPY‐Bridged Trisindole Derivatives for Solar Cell Applications

Let's get ready to dumbbell! Boron dipyrromethene-based (BODIPY) dumbbell-shaped molecules, including a first 2,3,5,6-tetravinyl aromatic BODIPY derivative, have been synthesized to strengthen π-stacking abilities. Used as a p-type material, high fill factors can be obtained in bulk heterojunction solar cells when blended with a fullerene derivative, leading to a new BODIPY-based record power conversion efficiency of 5.8 %.

[Communication]
Ibrahim Bulut, Quentin Huaulmé, Antoine Mirloup, Patricia Chávez, Sadiara Fall, Anne Hébraud, Stéphane Méry, Benoît Heinrich, Thomas Heiser, Patrick Lévêque, Nicolas Leclerc
ChemSusChem, April 07, 2017, https://doi.org/10.1002/cssc.201700465 Read article

Squaraine-Based Polymers: Toward Optimized Structures for Optoelectronic Devices

Squaraine‐Based Polymers: Toward Optimized Structures for Optoelectronic Devices

A novel polymer semiconductor based on squaric acid is successfully prepared through polycondensation reaction. Newly developed polysquaraine is active as p-channel semiconductor in thin-film transistors showing decent p-type mobility up to 5 × 10−4 cm2 V−1 s−1. Bulk heterojunction solar cells with power conversion efficiency up to 0.86% are also fabricated from the blends of polysquaraine and fullerene derivative PC71BM.

[Full Paper]
Alessandra Broggi, Hyungsug Kim, Jihye Jung, Maria Paola Bracciale, Maria Laura Santarelli, Choongik Kim, Assunta Marrocchi
Macromol. Chem. Phys., April 06, 2017, https://doi.org/10.1002/macp.201600487 Read article

Performance Enhancement of Tri-Cation and Dual-Anion Mixed Perovskite Solar Cells by Au@SiO2 Nanoparticles

Performance Enhancement of Tri‐Cation and Dual‐Anion Mixed Perovskite Solar Cells by Au@SiO2 Nanoparticles

Au@SiO2 core−shell nanoparticles are incorporated into perovskite solar cells based on tri-cation (cesium, methylammonium, and formamidinium) and dual-anion (Br and I) mixed perovskite. Significant enhancements are observed in nearly all photovoltaic parameters after Au@SiO2 nanoparticles incorporation. The enhanced device performance can be ascribed to the light absorption enhancement, more efficient carrier injection/transport, and the enhanced charge carriers mobilities.

[Full Paper]
Tao Ye, Shaoyang Ma, Xi Jiang, Lei Wei, Chellappan Vijila, Seeram Ramakrishna
Adv. Funct. Mater., April 06, 2017, https://doi.org/10.1002/adfm.201606545 Read article

Modified Fullerenes for Efficient Electron Transport Layer-Free Perovskite/Fullerene Blend-Based Solar Cells

Modified Fullerenes for Efficient Electron Transport Layer‐Free Perovskite/Fullerene Blend‐Based Solar Cells

Blending things up: New CH3NH3PbI3/fullerene blends based on a variety of fullerene derivatives (i.e., isoxazolino, pyrazolino, and methano[60]fullerenes) are demonstrated for the fabrication of electron transport layer-free solar cells that efficiently (i.e., up to 14.3 %) convert sunlight into electricity.

[Full Paper]
Rafael Sandoval-Torrientes, Jorge Pascual, Inés García-Benito, Silvia Collavini, Ivet Kosta, Ramón Tena-Zaera, Nazario Martín, Juan Luis Delgado
ChemSusChem, April 05, 2017, https://doi.org/10.1002/cssc.201700180 Read article

Benzimidazole/Pyridoimidazole-Based Organic Sensitizers for High-Performance Dye-Sensitized Solar Cells

Benzimidazole/Pyridoimidazole‐Based Organic Sensitizers for High‐Performance Dye‐Sensitized Solar Cells

A new class of dyes based on benzimidazole (BIm) and pyridoimidazole (PIm) were synthesized as sensitizers for dye-sensitized solar cells (DSSCs). The electronic properties of the synthesized dyes and their DSSCs depend mainly on the N-substituent and C-substituent at the BIm and PIm cores. The efficiencies of BIm-based dyes (SC35, SC36 and SC36N) are higher than the PIm-based dyes (SC32 and SC33). Introduction of a 4-hexylloxybenzene and a hexyl chain onto SC36 is beneficial to dark current suppression, and hence SC36 achieves the best efficiency of 7.38 % (∼85% of N719).

[Full Paper]
Sumit Chaurasia, Chun-Ting Li, Mulu Berhe Desta, Jen-Shyang Ni, Jiann T. Lin
Chem. Asian J., April 05, 2017, https://doi.org/10.1002/asia.201700039 Read article

Ethynyl-Linked Donor-π-Acceptor Boron Dipyrromethenes for Panchromatic Dye-Sensitized Solar Cells

Ethynyl‐Linked Donor‐π‐Acceptor Boron Dipyrromethenes for Panchromatic Dye‐Sensitized Solar Cells

Two boron dipyrromethene (BODIPY) derivatives were prepared as functional materials for applications in dye-sensitized solar cells (DSSCs). These compounds consist of a donor-π-acceptor skeleton in which an electron donor and an electron acceptor/anchoring group are introduced to the opposite C2 and C6 positions of a BODIPY core via an ethynyl linker (compounds DN1 and DN2).

[Full Paper]
Wen-Jing Shi, Takumi Kinoshita, Dennis K. P. Ng
Asian J. Org. Chem., April 05, 2017, https://doi.org/10.1002/ajoc.201700121 Read article

Rubidium Multication Perovskite with Optimized Bandgap for Perovskite-Silicon Tandem with over 26% Efficiency

Rubidium Multication Perovskite with Optimized Bandgap for Perovskite‐Silicon Tandem with over 26% Efficiency

Rubidium doping improves the crystallinity and suppresses the defect migration in the 1.73 eV bandgap perovskite, which lead to improvement in cell performance and light stability. Semi-transparent perovskite cell with efficiency of 16% and average transparency of 84% between 720 and 1100 nm is fabricated. By combining with 23.9% silicon cell, efficiency of 26.4% for four terminal tandem is obtained.

[Full Paper]
The Duong, YiLiang Wu, Heping Shen, Jun Peng, Xiao Fu, Daniel Jacobs, Er-Chien Wang, Teng Choon Kho, Kean Chern Fong, Matthew Stocks, Evan Franklin, Andrew Blakers, Ngwe Zin, Keith McIntosh, Wei Li, Yi-Bing Cheng, Thomas P. White, Klaus Weber, Kylie Catchpole
Adv. Energy Mater., April 04, 2017, https://doi.org/10.1002/aenm.201700228 Read article

A High-Performance D–A Copolymer Based on Dithieno[3,2-b:2′,3′-d]Pyridin-5(4H)-One Unit Compatible with Fullerene and Nonfullerene Acceptors in Solar Cells

A High‐Performance D–A Copolymer Based on Dithieno[3,2‐b:2′,3′‐d]Pyridin‐5(4H)‐One Unit Compatible with Fullerene and Nonfullerene Acceptors in Solar Cells

A low-bandgap D–A copolymer based on dithieno[3,2-b:2′,3′-d]pyridin-5(4H)-one unit, PDTP4TFBT, is developed and used as the donor material for polymer solar cells. PDTP4TFBT is among a few D–A copolymers that can deliver >7% power conversion efficiencies (PCEs) in both fullerene and nonfullerene solar cells. Ternary-blend solar cells based on PDTP4TFBT, PC71BM, and ITIC give a PCE of 9.20%.

[Communication]
Mingwei An, Fangyuan Xie, Xinjian Geng, Jianqi Zhang, Jiaxing Jiang, Zhongli Lei, Dan He, Zuo Xiao, Liming Ding
Adv. Energy Mater., April 03, 2017, https://doi.org/10.1002/aenm.201602509 Read article

Amorphous Hole-Transporting Material based on 2,2′-Bis-substituted 1,1′-Biphenyl Scaffold for Application in Perovskite Solar Cells

Amorphous Hole‐Transporting Material based on 2,2′‐Bis‐substituted 1,1′‐Biphenyl Scaffold for Application in Perovskite Solar Cells

How to fly a (perovs)kite: Perovskite solar cells are usually considered a promising technology that could expand the uses of solar energy. In most of the reported devices, Spiro-OMeTAD is used for positive-charge transport. In this work, carbazole-based V997, a hole-transporting material that can be obtained by a simple two-step synthetic procedure, is presented. It showed slightly lower performance than Spiro-OMeTAD, it does not form a crystalline state, and has lower material cost.

[Communication]
Artiom Magomedov, Nobuya Sakai, Egidijus Kamarauskas, Gabrielė Jokubauskaitė, Marius Franckevičius, Vygintas Jankauskas, Henry J. Snaith, Vytautas Getautis
Chem. Asian J., March 31, 2017, https://doi.org/10.1002/asia.201700173 Read article

Insights into the Influence of Work Functions of Cathodes on Efficiencies of Perovskite Solar Cells

Insights into the Influence of Work Functions of Cathodes on Efficiencies of Perovskite Solar Cells

A systematic investigation on the impact of the work function of the cathode on the performance of inverted structure perovskite solar cells is provided. Lowering the work function of the cathode largely improves performance, including promoting the separation and conduction of charge carriers and even increasing the generation rate of excitons.

[Full Paper]
Shizhong Yue, Shudi Lu, Kuankuan Ren, Kong Liu, Muhammad Azam, Dawei Cao, Zhijie Wang, Yong Lei, Shengchun Qu, Zhanguo Wang
Small, March 30, 2017, https://doi.org/10.1002/smll.201700007 Read article

Bandgap-Tuning in Triple-Chalcogenophene Polymer Films by Thermal Annealing

Bandgap‐Tuning in Triple‐Chalcogenophene Polymer Films by Thermal Annealing

The morphological, crystalline, and optoelectronic responses of a novel triple-chalcogenophene polymer are characterized. The presence of group-16 elements provides the system with thermal-bandgap-tuning-properties that allows for partnership with a broad range of photoactive donors/acceptors in organic solar devices. The chemically engineered combination of elements enables the use of low-bandgap polymer with postpolymerization adjusting properties along with easy processability requirements.

[Communication]
Daniel Moseguí González, Konstantinos N. Raftopoulos, Gang He, Christine M. Papadakis, Alex Brown, Eric Rivard, Peter Müller-Buschbaum
Macromol. Rapid Commun., March 29, 2017, https://doi.org/10.1002/marc.201700065 Read article

Pyridyl- and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye-Sensitized Solar Cells

Pyridyl‐ and Picolinic Acid Substituted Zinc(II) Phthalocyanines for Dye‐Sensitized Solar Cells

Fine-tuning through the anchor: A series of seven tri-tert-butyl zinc(II) phthalocyanines substituted on the periphery with pyridyl, carboxyl, or picolinic acid anchoring groups (see figure) were prepared and their photovoltaic properties in dye-sensitized solar cells investigated.

[Communication]
Juan Suanzes Pita, Maxence Urbani, Giovanni Bottari, Mine Ince, Sangeeta Amit Kumar, Aravind Kumar Chandiran, Jun-Ho Yum, Michael Grätzel, Mohammad Khaja Nazeeruddin, Tomas Torres
ChemPlusChem, March 29, 2017, https://doi.org/10.1002/cplu.201700048 Read article

Addressing Toxicity of Lead: Progress and Applications of Low-Toxic Metal Halide Perovskites and Their Derivatives

Addressing Toxicity of Lead: Progress and Applications of Low‐Toxic Metal Halide Perovskites and Their Derivatives

Recent progress in low toxic metal halide perovskites/derivatives is reviewed with a main focus on photovoltaic applications. The merits and drawbacks of the emerging alternatives in replacement of the state-of-the-art lead halide perovskites are discussed and their future challenges and research opportunities in both photovoltaics and other potential applications are highlighted.

[Review]
Miaoqiang Lyu, Jung-Ho Yun, Peng Chen, Mengmeng Hao, Lianzhou Wang
Adv. Energy Mater., March 29, 2017, https://doi.org/10.1002/aenm.201602512 Read article

Ligand-Free Copper-Catalyzed Cyano- and Alkynylstannylation of Arynes

Ligand‐Free Copper‐Catalyzed Cyano‐ and Alkynylstannylation of Arynes

Cyano- and alkynylstannylation of arynes facilely took place with a ligand-free copper catalyst to provide the respective carbostannylation products, which were transformable into antidepressant agents and a dye for a dye-sensitized solar cell.

[Communication]
Hiroto Yoshida, Teruhiko Kubo, Hitoshi Kuriki, Itaru Osaka, Ken Takaki, Yousuke Ooyama
ChemistrySelect, March 28, 2017, https://doi.org/10.1002/slct.201700297 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

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

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

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

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

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

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

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

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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