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19 Jul 17:19

Organic Field‐Effect Transistor for Energy‐Related Applications: Low‐Power‐Consumption Devices, Near‐Infrared Phototransistors, and Organic Thermoelectric Devices

by Xiaochen Ren , Fangxu Yang , Xiong Gao , Shanshan Cheng , Xiaotao Zhang , Huanli Dong , Wenping Hu
Advanced Energy Materials, EarlyView.
19 Jul 17:19

[ASAP] Singlet Fission in Covalent Terrylenediimide Dimers: Probing the Nature of the Multiexciton State Using Femtosecond Mid-Infrared Spectroscopy

by Michelle Chen, Youn Jue Bae, Catherine M. Mauck, Aritra Mandal, Ryan M. Young, Michael R. Wasielewski

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Journal of the American Chemical Society
DOI: 10.1021/jacs.8b04830
19 Jul 17:17

[ASAP] Cu-Catalyzed Aerobic Oxidative N–N Coupling of Carbazoles and Diarylamines Including Selective Cross-Coupling

by Michael C. Ryan, Joseph R. Martinelli, Shannon S. Stahl

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Journal of the American Chemical Society
DOI: 10.1021/jacs.8b05245
19 Jul 17:16

[ASAP] Effect of Isomerization on High-Performance Nonfullerene Electron Acceptors

by Jiayu Wang, Junxiang Zhang, Yiqun Xiao, Tong Xiao, Runyu Zhu, Cenqi Yan, Youquan Fu, Guanghao Lu, Xinhui Lu, Seth R. Marder, Xiaowei Zhan

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Journal of the American Chemical Society
DOI: 10.1021/jacs.8b04027
11 Jul 16:44

Designing ternary blend all-polymer solar cells with an efficiency of over 10% and a fill factor of 78%

Publication date: September 2018

Source: Nano Energy, Volume 51

Author(s): Zhenye Li, Lei Ying, Ruihao Xie, Peng Zhu, Ning Li, Wenkai Zhong, Fei Huang, Yong Cao

Abstract

In recent years, ternary blend bulk-heterojunction (BHJ) all-polymer solar cells have been gradually developed to better utilize the solar irradiance spectrum. However, power conversion efficiencies remain below 10%, mainly because of the low fill factor. Generally, the fill factor of all-polymer solar cells is limited mainly by the competition between the recombination and extraction of free charges. Here, we design advanced ternary blend all-polymer solar cells with a high fill factor of 78%, thus demonstrating how such recombination thresholds can be overcome. These results can be attributed to the high and balanced bulk charge mobility, reduced recombination, and optimized morphology, as well as the intimate mixing properties of the two donors in the photoactive layer.

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11 Jul 16:27

A minimal non-radiative recombination loss for efficient non-fullerene all-small-molecule organic solar cells with a low energy loss of 0.54 eV and high open-circuit voltage of 1.15 V

J. Mater. Chem. A, 2018, 6,13918-13924
DOI: 10.1039/C8TA04665D, Paper
Daobin Yang, Yuming Wang, Takeshi Sano, Feng Gao, Hisahiro Sasabe, Junji Kido
A minimal non-radiative recombination energy loss of 0.21 eV is achieved for non-fullerene all-small-molecule organic solar cells.
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11 Jul 16:27

A new polymer donor for efficient polymer solar cells: simultaneously realizing high short-circuit current density and transparency

J. Mater. Chem. A, 2018, Advance Article
DOI: 10.1039/C8TA05207G, Paper
Hang Yang, Yue Wu, Yan Zou, Yingying Dong, Jianyu Yuan, Chaohua Cui, Yongfang Li
A new polymer donor is developed for efficient polymer solar cells which can simultaneously achieve high short-circuit current density and transparency.
To cite this article before page numbers are assigned, use the DOI form of citation above.
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11 Jul 16:27

Rational design criteria for D–π–A structured organic and porphyrin sensitizers for highly efficient dye-sensitized solar cells

J. Mater. Chem. A, 2018, Advance Article
DOI: 10.1039/C8TA02281J, Review Article
Jung-Min Ji, Haoran Zhou, Hwan Kyu Kim
This review discusses recent progress and the rational design criteria used in the structural design of organic dyes and porphyrin photosensitizers for DSSCs. The effects of molecular structural engineering on the photophysical and electrochemical properties, photovoltaic parameters, and efficiency of DSSCs are presented.
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11 Jul 16:25

Nonfullerene Small-Molecule Acceptors with Perpendicular Side-Chains for Fullerene-Free Solar Cells

J. Mater. Chem. A, 2018, Accepted Manuscript
DOI: 10.1039/C8TA04718A, Review Article
Fugang Shen, Jianzhong Xu, Xue-Mei Li, Chuanlang Zhan
Organic photovoltaics (OPVs) represent one of the potential candidates of next-generation solar cells for converting the green and sustainable solar energy into electrical power. An OPV cell utilizes a blend...
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11 Jul 16:24

Stable and efficient perovskite solar cells fabricated using aqueous lead nitrate precursor: Interpretation of the conversion mechanism and renovation of the sequential deposition

Publication date: Available online 15 February 2018

Source: Materials Today Energy

Author(s): Tsung-Yu Hsieh, Tzu-Sen Su, Masashi Ikegami, Tzu-Chien Wei, Tsutomu Miyasaka

Abstract

In this study, we renovated the sequential deposition route to fabricate a high-quality methylammonium lead iodide (MAPbI3) capping layer in scaffold-type PSCs from a low-toxicity aqueous lead nitrate precursor system. Through interpretation of the slow and stepwise conversion mechanism from lead nitrate to MAPbI3 in a methylammonium iodide bath, two key innovations, namely chloride inclusion in the methylammonium iodide bath and multiple-cycle immersion, were applied to remedy the flaws in the original MAPbI3 film. The PSC fabricated from the aqueous lead nitrate precursor through this renovated process showed remarkable stability over 55 days in an ambient dark chamber. Our work clearly indicates that using water as a processing solvent is irrelevant to the conversion efficiency or stability of a PSC and demonstrates no difference in the quality of PSC made by PbI2/DMF protocol. This water-processed, environmentally friendly precursor system lights a direction of clean production of PSC using a minimal quantity of harmful organic solvents.

11 Jul 16:22

Molecular engineering of ionic type perylenediimide dimer-based electron transport materials for efficient planar perovskite solar cells

Publication date: September 2018

Source: Materials Today Energy, Volume 9

Author(s): Cheng Chen, Ming Cheng, Hongping Li, Fen Qiao, Peng Liu, Huaming Li, Lars Kloo, Licheng Sun

Abstract

The main of this work is to overcome the drawbacks of the traditional fullerene derivatives used as electron transport materials (ETMs) for perovskite solar cells (PSCs). Herein, a new strategy to design non-fullerene ETMs is presented by molecular engineering to include charged moieties in the ETM. The designed ETM FA2+-PDI2 is intrinsically ionic and the incorporated counter ions in FA2+-PDI2 significantly increase the electron conductivity and improve the film formation properties. Through careful device optimization, PSCs based on the ionic ETM FA2+-PDI2 exhibit an impressive average power conversion efficiency (PCE) of 17.0%, which is comparable to the PSC based on PC61BM (17.5%). The superior photovoltaic performance can be attributed to efficient electron extraction and effective electron transfer in the PSCs. This work provides important insights regarding the future design of new and efficient non-fullerene ETMs for PSCs.

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11 Jul 16:19

A new structure–activity relationship for cyanine dyes to improve photostability and fluorescence properties for live cell imaging

Chem. Sci., 2018, Advance Article
DOI: 10.1039/C8SC01574K, Edge Article
Open Access Open Access
Christian Schwechheimer, Franziska Rönicke, Ute Schepers, Hans-Achim Wagenknecht
A new set of cyanine-indole dyes was synthesized, characterized by optical and cytotoxic properties and subsequently applied for live cell imaging.
To cite this article before page numbers are assigned, use the DOI form of citation above.
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11 Jul 16:17

Thermally Driven Transport and Relaxation Switching Self‐Powered Electromagnetic Energy Conversion

by Maosheng Cao , Xixi Wang , Wenqiang Cao , Xiaoyong Fang , Bo Wen , Jie Yuan
Advanced Materials, July 2018.
11 Jul 16:17

Printing organic photovoltaics

by Giulia Tregnago

Printing organic photovoltaics

Printing organic photovoltaics, Published online: 10 July 2018; doi:10.1038/s41560-018-0212-2

Printing organic photovoltaics
10 Jul 11:57

Hidden Structure Ordering Along Backbone of Fused‐Ring Electron Acceptors Enhanced by Ternary Bulk Heterojunction

by Jiangquan Mai , Yiqun Xiao , Guodong Zhou , Jiayu Wang , Jingshuai Zhu , Ni Zhao , Xiaowei Zhan , Xinhui Lu
Advanced Materials, EarlyView.
10 Jul 11:56

Efficient Near‐Infrared Electroluminescence at 840 nm with “Metal‐Free” Small‐Molecule:Polymer Blends

by Alessandro Minotto , Petri Murto , Zewdneh Genene , Andrea Zampetti , Giuseppe Carnicella , Wendimagegn Mammo , Mats R. Andersson , Ergang Wang , Franco Cacialli
Advanced Materials, EarlyView.
10 Jul 11:43

Rationally Induced Interfacial Dipole in Planar Heterojunction Perovskite Solar Cells for Reduced J–V Hysteresis

by Zonghao Liu , Qi Chen , Jin‐Wook Lee , Zhixin Zhao , Xiaobao Xu , Yao‐Tsung Hsieh , Lei Meng , Pengyu Sun , Nicholas De Marco , Huanping Zhou , Yi‐Bing Cheng , Yang Yang
Advanced Energy Materials, July 2018.
10 Jul 11:41

Bandgap Narrowing in Non‐Fullerene Acceptors: Single Atom Substitution Leads to High Optoelectronic Response Beyond 1000 nm

by Jaewon Lee , Seo‐Jin Ko , Martin Seifrid , Hansol Lee , Benjamin R. Luginbuhl , Akchheta Karki , Michael Ford , Katie Rosenthal , Kilwon Cho , Thuc‐Quyen Nguyen , Guillermo C. Bazan
Advanced Energy Materials, EarlyView.
10 Jul 11:41

Thermally Stable High‐Performance Polymer Solar Cells Enabled by Interfacial Engineering

by Chao‐Hsuan Chen , Zhi‐Wei Lin , Kuan‐Min Huang , Prof. Hsin‐Fei Meng , Szu‐Han Chen , Prof. Ziyi Ge , Prof. Hsiao‐Wen Zan , Prof. Chih‐Yu Chang , Prof. Yu‐Chiang Chao , Prof. Sheng‐Fu Horng
Advanced Energy Materials, July 2018.
10 Jul 11:40

Side‐Chain Optimization of Phthalimide−Bithiophene Copolymers for Efficient All‐Polymer Solar Cells with Large Fill Factors

by Dr. Jianhua Chen , Fanglong Qiu , Qiaogan Liao , Changliang Peng , Prof. Feng Liu , Prof. Xugang Guo
Advanced Energy Materials, July 2018.
10 Jul 11:39

Toward Predicting Efficiency of Organic Solar Cells via Machine Learning and Improved Descriptors

by Harikrishna Sahu , Weining Rao , Alessandro Troisi , Haibo Ma
Advanced Energy Materials, July 2018.
10 Jul 11:38

Tetrathienoanthracene and Tetrathienylbenzene Derivatives as Hole‐Transporting Materials for Perovskite Solar Cell

by Diana Elizabeth Meza Rojas , Kyung Taek Cho , Yi Zhang , Maxence Urbani , Nouar Tabet , Gema de la Torre , Mohammad Khaja Nazeeruddin , Tomás Torres
Advanced Energy Materials, EarlyView.
10 Jul 11:34

Material insights and challenges for non-fullerene organic solar cells based on small molecular acceptors

by Jianquan Zhang

Material insights and challenges for non-fullerene organic solar cells based on small molecular acceptors

Material insights and challenges for non-fullerene organic solar cells based on small molecular acceptors, Published online: 02 July 2018; doi:10.1038/s41560-018-0181-5

Non-fullerene acceptors offer a promising development direction to increase the conversion efficiency and stability of organic photovoltaics. Here, Jianquan Zhang and co-workers highlight recent insight to guide molecular material design and discuss future challenges regarding device design and scalability.
10 Jul 11:33

Opportunities and challenges for tandem solar cells using metal halide perovskite semiconductors

by Tomas Leijtens

Opportunities and challenges for tandem solar cells using metal halide perovskite semiconductors

Opportunities and challenges for tandem solar cells using metal halide perovskite semiconductors, Published online: 09 July 2018; doi:10.1038/s41560-018-0190-4

Perovskites, with their wide bandgap range, are good partners for both commercial and novel photovoltaic technologies in multijunction solar cells. Here, McGehee and co-workers review recent material and device developments and highlight future challenges and opportunities for perovskite-based tandems.
10 Jul 11:32

[ASAP] Thiazole-Induced Quinoid Polymers for Efficient Solar Cells: Influence of Molecular Skeleton, Regioselectivity, and Regioregularity

by Dangqiang Zhu, Qian Wang, Yingying Wang, Xichang Bao, Meng Qiu, Bilal Shahid, Yonghai Li, Renqiang Yang

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Chemistry of Materials
DOI: 10.1021/acs.chemmater.8b01250
10 Jul 11:31

[ASAP] Effect of Acceptor Unit Length and Planarity on the Optoelectronic Properties of Isoindigo–Thiophene Donor–Acceptor Polymers

by Nicholas M. Randell, Chase L. Radford, Jinli Yang, Jesse Quinn, Dongliang Hou, Yuning Li, Timothy L. Kelly

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Chemistry of Materials
DOI: 10.1021/acs.chemmater.8b02535
10 Jul 11:28

[ASAP] De Novo Design of Excited-State Intramolecular Proton Transfer Emitters via a Thermally Activated Delayed Fluorescence Channel

by Kailong Wu, Tao Zhang, Zian Wang, Lian Wang, Lisi Zhan, Shaolong Gong, Cheng Zhong, Zheng-Hong Lu, Song Zhang, Chuluo Yang

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Journal of the American Chemical Society
DOI: 10.1021/jacs.8b04795
10 Jul 11:28

[ASAP] Morphology Optimization via Side Chain Engineering Enables All-Polymer Solar Cells with Excellent Fill Factor and Stability

by Xi Liu, Chaohong Zhang, Chunhui Duan, Mengmeng Li, Zhicheng Hu, Jing Wang, Feng Liu, Ning Li, Christoph J. Brabec, René A. J. Janssen, Guillermo C. Bazan, Fei Huang, Yong Cao

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Journal of the American Chemical Society
DOI: 10.1021/jacs.8b05038
10 Jul 11:28

[ASAP] Donor–Acceptor–Collector Ternary Crystalline Films for Efficient Solid-State Photon Upconversion

by Taku Ogawa, Masanori Hosoyamada, Brett Yurash, Thuc-Quyen Nguyen, Nobuhiro Yanai, Nobuo Kimizuka

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Journal of the American Chemical Society
DOI: 10.1021/jacs.8b04542
01 Jul 16:55

Organic emitter integrating aggregation-induced delayed fluorescence and room-temperature phosphorescence characteristics, and its application in time-resolved luminescence imaging

Chem. Sci., 2018, 9,6150-6155
DOI: 10.1039/C8SC01485J, Edge Article
Open Access Open Access
Fan Ni, Zece Zhu, Xiao Tong, Mingjuan Xie, Qiang Zhao, Cheng Zhong, Yang Zou, Chuluo Yang
A luminophore integrating aggregation-induced delayed fluorescence and room-temperature phosphorescence for time-resolved luminescence imaging.
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