Reducing energy loss via tuning energy levels of polymer acceptors for efficient all-polymer solar cells

Huiliang Sun; Bin Liu; Jianwei Yu; Xianshao Zou; Guangye Zhang; Yujie Zhang; Wei Zhang; Mengyao Su; Qunping Fan; Kun Yang; Jianhua Chen; He Yan; Feng Gao; Xugang Guo

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Reducing energy loss via tuning energy levels of polymer acceptors for efficient all-polymer solar cells

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The open-circuit voltage(Voc) of all-polymer solar cells(all-PSCs) is typically lower than 0.9 V even for the most efficient ones.Large energy loss is the main reason for limiting Voc and efficiency of all-PSCs. Herein, through materials design using electron deficient building blocks based on bithiophene imides, the lowest unoccupied molecular orbital(LUMO) energy levels of polymer acceptors can be effectively tuned, which resulted in a reduced energy loss induced by charge generation and recombination loss due to the suppressed charge-transfer(CT) state absorption. Despite a negligible driving force, all-PSC based on the polymer donor and acceptor combination with well-aligned energy levels exhibited efficient charge transfer and achieved an external quantum efficiency over 70% while maintaining a large Voc of 1.02 V, leading to a 9.21% efficiency. Through various spectroscopy approaches, this work sheds light on the mechanism of energy loss in all-PSCs, which paves an avenue to achieving efficient all-PSCs with large Voc and drives the further development of all-PSCs.

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来源
《中国科学》 |2020年第12期|P.1785-1792|共8页
作者
Huiliang Sun; Bin Liu; Jianwei Yu; Xianshao Zou; Guangye Zhang; Yujie Zhang; Wei Zhang; Mengyao Su; Qunping Fan; Kun Yang; Jianhua Chen; He Yan; Feng Gao; Xugang Guo;
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作者单位

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 ChinaDepartment of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China;

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 ChinaSchool of Advanced Materials Peking University Shenzhen Graduate School Peking University Shenzhen 518055 China;

Department of Physics Chemistry and Biology(IFM) Linköping University Linköping SE-58183 Sweden;

Division of Chemical Physics Lund University Box 124 22100 Lund Sweden;

eFlexPV Limited Flat/RM B 12/F Hang Seng Causeway Bay BLDG Causeway Bay Hong Kong China;

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China;

School of Physics and Electronic Engineering Guangzhou University Guangzhou 510006 China;

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China;

Department of Chemistry and Chemical Engineering Chalmers University of Technology Göteborg SE-41296 Sweden;

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China;

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China;

Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China;

Department of Physics Chemistry and Biology(IFM) Linköping University Linköping SE-58183 Sweden;

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China;

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原文格式 PDF
正文语种 chi
中图分类有机化学;
关键词
all-polymer solar cells; polymer acceptors; energy level modulation; photovoltage; energy loss;

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1. Polymer acceptors for all-polymer solar cells [J] . Xiaofei Ji ,Zuo Xiao ,Huiliang Sun . 半导体学报:英文版 . 2021,第8期
2. The Effect of Energy Levels of the Electron Acceptor Materials on Organic Photovoltaic Cells [J] . Hassen Derouiche ,Sami Saidi ,Abdelatif Belhadj Mohamed . 智能电网与可再生能源（英文） . 2011,第3期
3. Doping,Faceting and Heterostructuring Photocatalysts for More Efficient Solar Energy Conversion [C] . 刘岗 . 第八届全国催化剂制备科学与技术研讨会 . 2012
4. Energy Efficient Node Scheduling for Conservation of Energy in Wireless Sensor Network [A] . 尤玛 . 2014

Reducing energy loss via tuning energy levels of polymer acceptors for efficient all-polymer solar cells

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