期刊
CHEMSUSCHEM
卷 11, 期 4, 页码 672-680出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201702379
关键词
molecular stacking; organic semiconductors; perovskites; solar cells; perylene
资金
- National 973 Program [2015CB932204]
- National Science Foundation of China [51673165]
- Key Technology R&D Program of Science and Technology Department of Jiangsu Province [BE2014147-1]
- Fundamental Research Fund for the Central Universities [2017FZA3007]
Perylene derivatives are a family of well-known organic electron-transporting materials with excellent photochemical and thermal stabilities, and have been widely used in various optoelectronic devices. In this work, two diphenylamine functionalized N-annulated perylenes are reported as hole-transporting materials (HTMs) for perovskite solar cells. Through joint theoretical and experimental studies, the HTM employing a methoxyphenyl lateral substituent is found to feature a closer stacking distance and better aggregate connectivity in the solid film than its analogue with the bulky 2-hexyldecyl lateral substituent, contributing to a higher hole mobility and a remarkably enhanced device performance of perovskite solar cells. This work demonstrates the significant influence of lateral substituents of HTMs on the intermolecular packing and solid microstructure, giving a clear insight on the molecular design of high-performance organic semiconductors.
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