WFRF:(Zhang Guangye)
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Reducing energy lossviatuning energy levels of polymer acceptors for efficient all-polymer solar cells
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- Sun, Huiliang (author)
- Southern Univ Sci & Technol, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China; Hong Kong Univ Sci & Technol, Peoples R China
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- Liu, Bin (author)
- Southern Univ Sci & Technol, Peoples R China; Peking Univ, Peoples R China
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- Yu, Jianwei (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- (creator_code:org_t)
- 2020-07-30
- 2020
- English.
- In: Science China Chemistry. - : Science China Press and Springer-Verlag GmbH Germany. - 1674-7291 .- 1869-1870. ; 63, s. 1785-1792
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The open-circuit voltage (V-oc) 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 limitingV(oc)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 10% while maintaining a largeV(oc)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 largeV(oc)and drives the further development of all-PSCs.
Subject headings
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Keyword
- all-polymer solar cells; polymer acceptors; energy level modulation; photovoltage; energy loss
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Sun, Huiliang
- Liu, Bin
- Yu, Jianwei
- Zou, Xianshao
- Zhang, Guangye
- Zhang, Yujie
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- Zhang, Wei
- Su, Mengyao
- Fan, Qunping
- Yang, Kun
- Chen, Jianhua
- Yan, He
- Gao, Feng
- Guo, Xugang
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- Linköping University
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