Journal ArticleDOI
An electron acceptor challenging fullerenes for efficient polymer solar cells.
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TLDR
A novel non-fullerene electron acceptor (ITIC) that overcomes some of the shortcomings of fullerene acceptors, for example, weak absorption in the visible spectral region and limited energy-level variability, is designed and synthesized.Abstract:
A novel non-fullerene electron acceptor (ITIC) that overcomes some of the shortcomings of fullerene acceptors, for example, weak absorption in the visible spectral region and limited energy-level variability, is designed and synthesized. Fullerene-free polymer solar cells (PSCs) based on the ITIC acceptor are demonstrated to exhibit power conversion effi ciencies of up to 6.8%, a record for fullerene-free PSCs.read more
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Efficient Charge Transfer and Fine-Tuned Energy Level Alignment in a THF-Processed Fullerene-Free Organic Solar Cell with 11.3% Efficiency.
Zhong Zheng,Omar Awartani,Bhoj Gautam,Delong Liu,Yunpeng Qin,Wanning Li,Alexander Bataller,Kenan Gundogdu,Harald Ade,Jianhui Hou +9 more
TL;DR: Fullerene-free organic solar cells show over 11% power conversion efficiency, processed by low toxic solvents, and the applied donor and acceptor in the bulk heterojunction exhibit almost the same highest occupied molecular orbital level, yet exhibit very efficient charge creation.
Journal ArticleDOI
Graphdiyne Derivative as Multifunctional Solid Additive in Binary Organic Solar Cells with 17.3% Efficiency and High Reproductivity
Le Liu,Yuanyuan Kan,Ke Gao,Jianxiao Wang,Min Zhao,Hao Chen,Chengjie Zhao,Tonggang Jiu,Alex K.-Y. Jen,Alex K.-Y. Jen,Yuliang Li +10 more
TL;DR: Chlorine-functionalized graphdiyne (GCl) is successfully applied as a multifunctional solid additive to fine-tune the morphology and improve device efficiency as well as reproductivity for the first time and confirms the efficacy of GCl to enhance device performance.
Journal ArticleDOI
Theoretical Modeling of Singlet Fission
TL;DR: A review of the most recent advances with respect to the theoretical and computational studies on the singlet fission phenomenon revisits important aspects regarding electronic states involved in the process, the evaluation of fission rates and interstate couplings, and the advances in the design and characterization of single fission compounds and materials.
Journal ArticleDOI
Realizing 19.05% Efficiency Polymer Solar Cells by Progressively Improving Charge Extraction and Suppressing Charge Recombination
TL;DR: In this paper , the authors improved the charge extraction and suppressed charge recombination of polymer solar cells through the combination of side-chain engineering of new nonfullerene acceptors (NFAs), adopting ternary blends, and introducing volatilizable solid additives.
Journal ArticleDOI
Simple non-fused electron acceptors for efficient and stable organic solar cells.
Zhi-Peng Yu,Zhi-Xi Liu,Fang-Xiao Chen,Ran Qin,Tsz-Ki Lau,Jinglin Yin,Xueqian Kong,Xinhui Lu,Minmin Shi,Chang-Zhi Li,Hongzheng Chen +10 more
TL;DR: In this article, simple non-fused-ring electron acceptors are developed through two-step synthesis from single aromatic units for constructing efficient OSCs with the assistance of non-covalent interactions.
References
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Journal ArticleDOI
Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
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Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure
TL;DR: In this article, the authors showed that PFN can be incorporated into polymer light-emitting devices (PLEDs) to enhance electron injection from high-work-function metals such as aluminium (work function w of 4.3 eV) and gold (w ¼ 5.2 eV).
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Semiconducting π-conjugated systems in field-effect transistors: a material odyssey of organic electronics.
TL;DR: The focus of this review will be on the performance analysis of π-conjugated systems in OFETs, a kind of device consisting of an organic semiconducting layer, a gate insulator layer, and three terminals that provide an important insight into the charge transport of ρconjugate systems.
Journal ArticleDOI
A polymer tandem solar cell with 10.6% power conversion efficiency
Jingbi You,Letian Dou,Ken Yoshimura,Takehito Kato,Kenichiro Ohya,Tom Moriarty,Keith Emery,Chun-Chao Chen,Jing Gao,Gang Li,Yang Yang +10 more
TL;DR: The development of a high-performance low bandgap polymer that enables a solution processed tandem solar cell with certified 10.6% power conversion efficiency under standard reporting conditions, which is the first certified polymer solar cell efficiency over 10%.
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Molecular design of photovoltaic materials for polymer solar cells: toward suitable electronic energy levels and broad absorption.
TL;DR: This Account discusses the basic requirements and scientific issues in the molecular design of high efficiency photovoltaic molecules, and summarizes recent progress in electronic energy level engineering and absorption spectral broadening of the donor and acceptor photvoltaic materials by my research group and others.