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Reducing energy los...
Reducing energy lossviatuning energy levels of polymer acceptors for efficient all-polymer solar cells
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- Sun, Huiliang (författare)
- 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 (författare)
- Southern Univ Sci & Technol, Peoples R China; Peking Univ, Peoples R China
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- Yu, Jianwei (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Zou, Xianshao (författare)
- Lund Univ, Sweden
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- Zhang, Guangye (författare)
- eFlexPV Ltd, Peoples R China
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- Zhang, Yujie (författare)
- Southern Univ Sci & Technol, Peoples R China
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- Zhang, Wei (författare)
- Guangzhou Univ, Peoples R China
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- Su, Mengyao (författare)
- Southern Univ Sci & Technol, Peoples R China
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- Fan, Qunping (författare)
- Chalmers Univ Technol, Sweden
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- Yang, Kun (författare)
- Southern Univ Sci & Technol, Peoples R China
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- Chen, Jianhua (författare)
- Southern Univ Sci & Technol, Peoples R China
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- Yan, He (författare)
- Hong Kong Univ Sci & Technol, Peoples R China
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- Gao, Feng (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Guo, Xugang (författare)
- Southern Univ Sci & Technol, Peoples R China
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(creator_code:org_t)
- 2020-07-30
- 2020
- Engelska.
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Ingår i: Science China Chemistry. - : Science China Press and Springer-Verlag GmbH Germany. - 1674-7291 .- 1869-1870. ; 63, s. 1785-1792
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Nyckelord
- all-polymer solar cells; polymer acceptors; energy level modulation; photovoltage; energy loss
Publikations- och innehållstyp
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Sun, Huiliang
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Liu, Bin
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Yu, Jianwei
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Zou, Xianshao
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Zhang, Guangye
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Zhang, Yujie
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Zhang, Wei
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Su, Mengyao
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Fan, Qunping
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Yang, Kun
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Chen, Jianhua
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Yan, He
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Gao, Feng
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Guo, Xugang
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