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Geometry design of tethered small-molecule acceptor enables highly stable and efficient polymer solar cells
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- Bai, Yang (author)
- Beijing Univ Chem Technol, Peoples R China
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- Zhang, Ze (author)
- Beijing Univ Chem Technol, Peoples R China
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- Zhou, Qiuju (author)
- Xinyang Normal Univ, Peoples R China
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- NATURE PORTFOLIO, 2023
- 2023
- English.
- In: Nature Communications. - : NATURE PORTFOLIO. - 2041-1723. ; 14:1
- Journal article (peer-reviewed)
Abstract
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- With the power conversion efficiency of binary polymer solar cells dramatically improved, the thermal stability of the small-molecule acceptors raised the main concerns on the device operating stability. Here, to address this issue, thiophene-dicarboxylate spacer tethered small-molecule acceptors are designed, and their molecular geometries are further regulated via the thiophene-core isomerism engineering, affording dimeric TDY-alpha with a 2, 5-substitution and TDY-beta with 3, 4-substitution on the core. It shows that TDY-alpha processes a higher glass transition temperature, better crystallinity relative to its individual small-molecule acceptor segment and isomeric counterpart of TDY-beta, and amore stablemorphology with the polymer donor. As a result, the TDY-alpha based device delivers a higher device efficiency of 18.1%, and most important, achieves an extrapolated lifetime of about 35000 hours that retaining 80% of their initial efficiency. Our result suggests that with proper geometry design, the tethered small-molecule acceptors can achieve both high device efficiency and operating stability.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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- art (subject category)
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- Bai, Yang
- Zhang, Ze
- Zhou, Qiuju
- Geng, Hua
- Chen, Qi
- Kim, Seoyoung
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- Zhang, Rui
- Zhang, Cen
- Chang, Bowen
- Li, Shangyu
- Fu, Hongyuan
- Xue, Lingwei
- Wang, Haiqiao
- Li, Wenbin
- Chen, Weihua
- Gao, Mengyuan
- Ye, Long
- Zhou, Yuanyuan
- Ouyang, Yanni
- Zhang, Chunfeng
- Gao, Feng
- Yang, Changduk
- Li, Yongfang
- Zhang, Zhi-Guo
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- Linköping University
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