Electron Transporting Polymeric Materials with Partial Quaternization for High-Performance Organic Solar Cells

Efficient cathode interfacial layers (CILs) have become a crucial component of organic solar cells (OSCs). Charge extraction barriers, interfacial trap states, and significant transport resistance may be induced due to the unfavorable cathode interlayer, limiting the device performance. In this stud...

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Published inMacromolecular rapid communications. p. e2400479
Main Authors Lei, Hongliang, Yu, Fengyi, Chen, Chen, Li, Yulu, Hu, Dingqin, Chen, Yao, Tian, Gengsui, Liu, Lei, Yang, Ke, Xiao, Zeyun
Format Journal Article
LanguageEnglish
Published Germany 09.08.2024
Subjects
organic solar cells
poly(4‐vinylpyridine)
conductivity
cathode interfacial layers
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Summary:Efficient cathode interfacial layers (CILs) have become a crucial component of organic solar cells (OSCs). Charge extraction barriers, interfacial trap states, and significant transport resistance may be induced due to the unfavorable cathode interlayer, limiting the device performance. In this study, poly(4-vinylpyridine) is used as the CIL for OSCs, and a new type of CIL named P4VP-I is synthesized through the quaternization strategy. Compared to P4VP, P4VP-I CIL exhibits enhanced conductivity and optimized work function. OSCs employing the P4VP-I ETL demonstrate prolonged carrier lifetime, suppressed charge recombination, and achieve higher power conversion efficiencies (PCE) than the commonly used ETLs such as PFN-Br and Phen-NaDPO.
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ISSN:1022-1336
1521-3927
1521-3927
DOI:10.1002/marc.202400479