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Suppressed recombin...
Suppressed recombination loss in organic photovoltaics adopting a planar-mixed heterojunction architecture
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- Jiang, Kui (författare)
- City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China
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- Zhang, Jie (författare)
- Chinese Acad Sci, Peoples R China
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- Zhong, Cheng (författare)
- Wuhan Univ, Peoples R China
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- Lin, Francis R. (författare)
- City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China
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- Qi, Feng (författare)
- City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China
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- Li, Qian (författare)
- Nanjing Univ, Peoples R China; Nanjing Univ, Peoples R China
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- Peng, Zhengxing (författare)
- North Carolina State Univ, NC USA
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- Kaminsky, Werner (författare)
- Univ Washington, WA 98195 USA
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- Jang, Sei-Hum (författare)
- Univ Washington, WA 98195 USA
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- Yu, Jianwei (författare)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Deng, Xiang (författare)
- City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China
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- Hu, Huawei (författare)
- Donghua Univ, Peoples R China
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- Shen, Dong (författare)
- City Univ Hong Kong, Peoples R China
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- Gao, Feng (författare)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Ade, Harald (författare)
- North Carolina State Univ, NC USA
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- Xiao, Min (författare)
- Nanjing Univ, Peoples R China; Nanjing Univ, Peoples R China
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- Zhang, Chunfeng (författare)
- Nanjing Univ, Peoples R China; Nanjing Univ, Peoples R China; Nanjing Univ, Peoples R China
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- Jen, Alex K-Y (författare)
- City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China; Univ Washington, WA 98195 USA
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(creator_code:org_t)
- 2022-11-14
- 2022
- Engelska.
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Ingår i: Nature Energy. - : NATURE PORTFOLIO. - 2058-7546. ; 7:11, s. 1076-1086
- 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
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- At present, high-performance organic photovoltaics mostly adopt a bulk-heterojunction architecture, in which exciton dissociation is facilitated by charge-transfer states formed at numerous donor-acceptor (D-A) heterojunctions. However, the spin character of charge-transfer states originated from recombination of photocarriers allows relaxation to the lowest-energy triplet exciton (T-1) at these heterojunctions, causing photocurrent loss. Here we find that this loss pathway can be alleviated in sequentially processed planar-mixed heterojunction (PMHJ) devices, employing donor and acceptor with intrinsically weaker exciton binding strengths. The reduced D-A intermixing in PMHJ alleviates non-geminate recombination at D-A contacts, limiting the chance of relaxation, thus suppressing T-1 formation without sacrificing exciton dissociation efficiency. This resulted in devices with high power conversion efficiencies of >19%. We elucidate the working mechanisms for PMHJs and discuss the implications for material design, device engineering and photophysics, thus providing a comprehensive grounding for future organic photovoltaics to reach their full promise. Organic solar cells with a bulk-heterojunction architecture suffer from photocurrent loss driven by triplet states. Now, Jiang et al. show that sequentially deposited donor-acceptor planar-mixed heterojunctions suppress triplet formation, enabling efficiencies over 19%.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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Jiang, Kui
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Zhang, Jie
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Zhong, Cheng
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Lin, Francis R.
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Qi, Feng
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Li, Qian
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visa fler...
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Peng, Zhengxing
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Kaminsky, Werner
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Jang, Sei-Hum
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Yu, Jianwei
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Deng, Xiang
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Hu, Huawei
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Shen, Dong
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Gao, Feng
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Ade, Harald
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Xiao, Min
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Zhang, Chunfeng
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Jen, Alex K-Y
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visa färre...
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