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Increasing terminal alkyl chain length for a better small molecule organic solar cell donor
Ahmed, Shohel1,2,3; Yang, Ke1,2; Chen, Yao1,2; Chen, Haiyan1,2; Huang, Peihao1,2; Xue, Shuangxi4; Xiao, Zeyun1,2; Lu, Shirong4
2024-09-01
摘要Optimizing the alkyl chains within a terminal group is considered to be a highly effective approach for boosting the power conversion efficiency (PCE) of all small-molecule organic solar cells (ASM-OSCs). In this study, we focus on designing and synthesizing small molecular (SM) donor compounds with different end-group alkyl chain lengths to study their impact on OSC performance. Under optimized conditions, OSC devices based on BTR-ClC8:Y6 demonstrate higher PCE of 14.43 % compared to those based on BTR-Cl:Y6. Moreover, BTR-Cl-C8 exhibits reduced levels of bimolecular recombination and trap-assisted recombination, enhanced capability for exciton dissociation and charge collection, and extended carrier lifetimes. These results highlight the significance of molecular design strategies in optimizing OSC performance and offer valuable insights for the development of efficient and stable ASM-OSCs.
关键词All -small -molecule organic solar cell Small molecule donor Terminal alkyl chains
DOI10.1016/j.dyepig.2024.112240
发表期刊DYES AND PIGMENTS
ISSN0143-7208
卷号228页码:7
通讯作者Yang, Ke(yangke@cigit.ac.cn) ; Lu, Shirong(lushirong@tzc.edu.cn)
收录类别SCI
WOS记录号WOS:001247439300001
语种英语