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Solvent annealing for morphology control to realize high efficiency all-small-molecule organic solar cells
Hu, Dingqin1,2,3; Chen, Qianqian1,2,3; Zhang, Jingquan1; Lu, Shirong3,4
2022-11-22
摘要Morphology control of all-small-molecule (ASM) organic solar cells (OSCs) is crucial for improving their efficiencies. However, choosing an appropriate strategy for these systems is highly challenging. In this study, carbon disulfide (CS2) is demonstrated to tune morphology and synchronously enhance the power conversion efficiencies (PCEs) of BTR-Cl/Y6 based ASM-OSCs. The improved PCEs are mainly due to the with better phase separation resulting in reduced recombination, prolonged carrier lifetime, and facilitated charge extraction. Thus, compared with TA (thermal annealing) based devices, the CS2-treatment based devices exhibit better performance with FF enhanced from 65.8% to 74.2% and J(SC) increased from 24.23 to 24.78 mA cm(-2), leading to a higher PCE of 15.5%. These findings demonstrate that the solvent (CS2) treatment can be a simple and effective way to deliver highly efficient OSCs.
DOI10.1039/d2se01303g
发表期刊SUSTAINABLE ENERGY & FUELS
ISSN2398-4902
卷号6期号:23页码:5256-5260
通讯作者Zhang, Jingquan() ; Lu, Shirong()
收录类别SCI
WOS记录号WOS:000879495700001
语种英语