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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Optimizing the conjugated side chains of quinoxaline based polymers for nonfullerene solar cells with 10.5% efficiency
Shutao Xu,Xiaojing Wang,Liuliu Feng,Zhicai He,Hongjian Peng,Věra Cimrová,Jun Yuan,Zhi-Guo Zhang,Yongfang Li,Yingping Zou +9 more
TL;DR: In this paper, two new polymers based on quinoxaline (Qx) were proposed to improve the power conversion efficiency of non-fullerene solar cells by optimizing the length of side chains and the kinds of aromatic rings in conjugated side chains.
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A Trialkylsilylthienyl Chain-Substituted Small-Molecule Acceptor with Higher LUMO Level and Reduced Band Gap for Over 16% Efficiency Fullerene-Free Ternary Solar Cells
Dan Su,Dan Su,Mingao Pan,Mingao Pan,Zhongfei Liu,Tsz-Ki Lau,Xiaofang Li,Xiaofang Li,Fugang Shen,Fugang Shen,Shuying Huo,Xinhui Lu,Aiju Xu,He Yan,Chuanlang Zhan,Chuanlang Zhan,Chuanlang Zhan +16 more
TL;DR: The ternary approach using a smaller band gap acceptor as the near-infrared (NIR) absorber to increase the short-circuit current density (Jsc) usually decreases the opencircuit voltage (Voc) as discussed by the authors.
Journal ArticleDOI
Geometrically controlled organic small molecule acceptors for efficient fullerene-free organic photovoltaic devices
TL;DR: In this article, a 2,5-difluorobenzene (F2B) moiety within the core unit of an organic small molecule (SM) acceptor was proposed to enhance the planarity of the conjugated core and downshift the energy levels of the SM acceptor.
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Molecular Consideration for Small Molecular Acceptors Based on Ladder-Type Dipyran: Influences of O-Functionalization and π-Bridges
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Facile Synthesis of Polycyclic Aromatic Hydrocarbon (PAH)–Based Acceptors with Fine-Tuned Optoelectronic Properties: Toward Efficient Additive-Free Nonfullerene Organic Solar Cells
Yang Wang,Yang Wang,Bin Liu,Bin Liu,Chang Woo Koh,Xin Zhou,Huiliang Sun,Jianwei Yu,Kun Yang,Hang Wang,Qiaogan Liao,Han Young Woo,Xugang Guo +12 more
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.