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Rigidifying Nonplanar Perylene Diimides by Ring Fusion Toward Geometry‐Tunable Acceptors for High‐Performance Fullerene‐Free Solar Cells
Author(s) -
Zhong Hongliang,
Wu ChenHao,
Li ChangZhi,
Carpenter Joshua,
Chueh ChuChen,
Chen JungYao,
Ade Harald,
Jen Alex K.Y.
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201504120
Subject(s) - perylene , materials science , diimide , thiophene , fullerene , chalcogen , organic solar cell , fusion , ring (chemistry) , photochemistry , crystallography , polymer , molecule , chemistry , organic chemistry , linguistics , philosophy , composite material
Rigid fused perylene diimide (PDI) dimers bridged with heterocycles exhibit superior photovoltaic performance compared to their unfused semiflexible analogues. Changing the chalcogen atoms in the aromatic bridges gradually increases the twist angles between the two PDI planes, leading to a varied morphology in which the one bridged by thiophene achieves a balance and shows the best efficiency of 6.72%.