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  • Liu, WeiCent South Univ, Peoples R China (author)

A-pi-A structured non-fullerene acceptors for stable organic solar cells with efficiency over 17%

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-05-25
  • SCIENCE PRESS,2022
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-185594
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-185594URI
  • https://doi.org/10.1007/s11426-022-1281-0DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|National Natural Science Foundation of China [52125306, 21875286, 22005347]; Natural Science Foundation of Hunan Province [2021JJ20068]; National Key Research and Development Program of China [2017YFA0206600]
  • With the development of photovoltaic materials, especially the small molecule acceptors (SMAs), organic solar cells (OSCs) have made breakthroughs in power conversion efficiencies (PCEs). However, the stability of high-performance OSCs remains a critical challenge for future technological applications. To tackle the inherent instability of SMA materials under the ambient conditions, much effort has been made to improve OSCs stability, including device modification and new materials design. Here we proposed a new electron acceptor design strategy and developed a "quasi-macromolecule" (QM) with an A-pi-A structure, where the functionalized pi-bridge is used as a linker between two SMAs (A), to improve the long-term stability without deteriorating device efficiencies. Such type of QMs enables excellent synthetic flexibility to modulate their optical/electro-chemical properties, crystallization and aggregation behaviors by changing the A and pi units. Moreover, QMs possess a unique long conjugated backbone combining high molecular weight over 3.5 kDa with high purity. Compared with the corresponding SMA BTP-4F-OD (Y6-OD), the devices based on newly synthesized A-pi-A type acceptors QM1 and QM2 could exhibit better device stability and more promising PCEs of 17.05% and 16.36%, respectively. This kind of "molecular-framework" (A-pi-A) structure provides a new design strategy for developing high-efficiency and -stability photovoltaic materials.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Yuan, JunCent South Univ, Peoples R China (author)
  • Zhu, CanChinese Acad Sci, Peoples R China (author)
  • Wei, QingyaCent South Univ, Peoples R China (author)
  • Liang, SongtingCent South Univ, Peoples R China (author)
  • Zhang, HuotianLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)huozh22 (author)
  • Zheng, GuanhaojieChinese Acad Sci, Peoples R China (author)
  • Hu, YunbinCent South Univ, Peoples R China (author)
  • Meng, LeiChinese Acad Sci, Peoples R China (author)
  • Gao, Feng,1981-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)fenga88 (author)
  • Li, YongfangChinese Acad Sci, Peoples R China (author)
  • Zou, YingpingCent South Univ, Peoples R China (author)
  • Cent South Univ, Peoples R ChinaChinese Acad Sci, Peoples R China (creator_code:org_t)

Related titles

  • In:Science in China Series B: SCIENCE PRESS65:7, s. 1374-13821674-72911869-1870

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