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N ‐Annulated Perylene‐Based Hole Transporters for Perovskite Solar Cells: The Significant Influence of Lateral Substituents
Author(s) -
Li Yang,
Zhu Rui,
Wang Junting,
Li ZeSheng,
Xu Niansheng,
Zhang Jidong,
Wang Peng
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201702379
Subject(s) - perylene , substituent , perovskite (structure) , stacking , materials science , diphenylamine , intermolecular force , electron mobility , organic semiconductor , photochemistry , crystallography , chemistry , optoelectronics , molecule , stereochemistry , organic chemistry , metallurgy
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.