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  • Fan, BaobingCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)

Correlation of Local Isomerization Induced Lateral and Terminal Torsions with Performance and Stability of Organic Photovoltaics

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023-03-06
  • AMER CHEMICAL SOC,2023
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-192657
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-192657URI
  • https://doi.org/10.1021/jacs.2c13247DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • Funding Agencies|APRC Grant of the City University of Hong Kong; Innovation and Technology Commission of Hong Kong; Environment and Ecology Bureau of Hong Kong; Research Grants Council of Hong Kong [9380086, 9610508]; US Office of Naval Research [GHP/018/20SZ, MRP/040/21X]; Shen zhen Science and Technology Program [202020164]; Guangdong Major Project of Basic and Applied Basic Research [11307621, 11316422, N00014-20-1-2191]; Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials [C6023-19GF]; Office of Science, Office of Basic Energy Sciences, of the US Department of Energy [SGDX20201103095412040]; [2019B030302007]; [2019B121205002]; [DE-AC02-05CH11231]
  • Organic photovoltaics (OPVs) have achieved great progress in recent years due to delicately designed non-fullerene acceptors (NFAs). Compared with tailoring of the aromatic heterocycles on the NFA backbone, the incorporation of conjugated side-groups is a cost-effective way to improve the photoelectrical properties of NFAs. However, the modifications of side-groups also need to consider their effects on device stability since the molecular planarity changes induced by side-groups are related to the NFA aggregation and the evolution of the blend morphology under stresses. Herein, a new class of NFAs with localisomerized conjugated side-groups are developed and the impact of local isomerization on their geometries and device performance/stability are systematically investigated. The device based on one of the isomers with balanced side- and terminal-group torsion angles can deliver an impressive power conversion efficiency (PCE) of 18.5%, with a low energy loss (0.528 V) and an excellent photo- and thermal stability. A similar approach can also be applied to another polymer donor to achieve an even higher PCE of 18.8%, which is among the highest efficiencies obtained for binary OPVs. This work demonstrates the effectiveness of applying local isomerization to fine-tune the side-group steric effect and non-covalent interactions between side-group and backbone, therefore improving both photovoltaic performance and stability of fused ring NFA-based OPVs.

Subject headings and genre

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

  • Gao, WeiCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • Zhang, RuiLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)ruizh84 (author)
  • Kaminsky, WernerUniv Washington, WA 98195 USA (author)
  • Lin, Francis R.City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • Xia, XinxinChinese Univ Hong Kong, Peoples R China (author)
  • Fan, QunpingXi An Jiao Tong Univ, Peoples R China (author)
  • Li, YanxunCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • An, YidanCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • Wu, YueCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • Liu, MingCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • Lu, XinhuiChinese Univ Hong Kong, Peoples R China (author)
  • Li, Wen JungCity Univ Hong Kong, Peoples R China (author)
  • Yip, Hin-LapCity Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China (author)
  • Gao, FengLinköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)fenga88 (author)
  • Jen, Alex K. -Y.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 (author)
  • City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R ChinaElektroniska och fotoniska material (creator_code:org_t)

Related titles

  • In:Journal of the American Chemical Society: AMER CHEMICAL SOC145:10, s. 5909-59190002-78631520-5126

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