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A Volatile Solid Additive Enables Oligothiophene All-Small-Molecule Organic Solar Cells with Excellent Commercial Viability
Hu, Dingqin1,2; Tang, Hua3; Karuthedath, Safakath3; Chen, Qianqian1,2; Chen, Si3; Khan, Jafar I. I.3; Liu, Heng4; Yang, Qianguang1; Gorenflot, Julien3; Petoukhoff, Christopher E. E.3
2022-12-07
摘要The commercial viability of all-small-molecule (ASM) organic solar cells (OSCs) requires high efficiency, long-term stability, and low-cost production. However, satisfying all these factors at the same time remains highly challenging. Herein, a volatile solid additive, namely, 1,8-dichloronaphthalene (DCN) is demonstrated to simultaneously enhance the power conversion efficiency (PCE) and the storage, thermal as well as photo stabilities of oligothiophene ASM-OSCs with concise and low-cost syntheses. The improved PCEs are mainly due to the DCN-induced morphology control with improved exciton dissociation and reduced non-geminate recombination. Notably, the PCE of 16.0% stands as the best value for oligothiophene ASM-OSCs and is among the top values for all types of binary ASM-OSCs. In addition, devices incorporating DCN have shown remarkable long-term stability, retaining over 90% of their initial PCE after dark storage aging of 3000 h and thermal or light stressing of 500 h. The findings demonstrate that the volatile-solid-additive strategy can be a simple yet effective method of delivering highly efficient and stable oligothiophene ASM-OSCs with excellent commercial viability.
关键词all-small-molecule organic solar cells long-term stability oligothiophene donors solid additives
DOI10.1002/adfm.202211873
发表期刊ADVANCED FUNCTIONAL MATERIALS
ISSN1616-301X
页码12
通讯作者Tang, Hua(hua.tang.1@kaust.edu.sa) ; Laquai, Frederic(frederic.laquai@kaust.edu.sa) ; Lu, Shirong(lushirong@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000893546900001
语种英语