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High‐Performance Organic Solar Cells Based on a Non‐Fullerene Acceptor with a Spiro Core
Author(s) -
Sun Hua,
Sun Po,
Zhang Cong,
Yang Yingguo,
Gao Xingyu,
Chen Fei,
Xu Zongxiang,
Chen ZhiKuan,
Huang Wei
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201601741
Subject(s) - organic solar cell , fullerene , acceptor , intramolecular force , electron acceptor , materials science , molecule , conjugated system , chromophore , small molecule , chemistry , nanotechnology , photochemistry , polymer , organic chemistry , biochemistry , physics , composite material , condensed matter physics
Derived from perylenediimide (PDI) building blocks, 3D PDI molecules are considered as a type of promising structure to overcome molecular aggregation, thus improving the performance of organic solar cells. Herein, we report a novel PDI‐based derivative, SCPDT‐PDI 4 , with four PDI units connected to a unique spiro core. Attributed to this novel molecular design, SCPDT‐PDI 4 exhibits a rigid 3D structure, in which the aggregation tendency of PDI chromophores could be effectively attenuated. Additionally, strong intramolecular charge transfer and high charge mobility are achieved due to the well‐conjugated structure and electron‐rich property of SCPDT. Therefore, fullerene‐free organic solar cells based on SCPDT‐PDI 4 and PTB7‐Th achieve a remarkable high efficiency of 7.11 %. Such an excellent result demonstrates the opportunity of SCPDT to be a promising building block for non‐fullerene acceptors.