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Precise Synthesis of Fused Decacyclic Electron Acceptor Isomers for Organic Solar Cells
Author(s) -
Lu Bing,
Zhang Zhecheng,
Jia Boyu,
Cai Guilong,
Zhu Jingshuai,
Lu Xinhui,
Zhan Xiaowei,
Yao Yong
Publication year - 2021
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202100163
Subject(s) - molar absorptivity , organic solar cell , electron acceptor , naphthalene , isomerization , materials science , acceptor , short circuit , electron mobility , photochemistry , absorption (acoustics) , electron , absorption spectroscopy , energy conversion efficiency , photovoltaic system , ring (chemistry) , electron transport chain , electron donor , active layer , optoelectronics , layer (electronics) , chemistry , nanotechnology , organic chemistry , optics , polymer , voltage , catalysis , physics , composite material , biology , condensed matter physics , quantum mechanics , thin film transistor , biochemistry , ecology
Two intermediates (dimethyl 3,7‐dibromonaphthalene‐2,6‐dicarboxylate and dimethyl 1,5‐dibromonaphthalene‐2,6‐dicarboxylate) are synthesized to realize the isomerization of naphthalene‐based decacyclic fused‐ring electron acceptors FTIC1 and FTIC2. The linear‐shaped FTIC1 and nonlinear‐shaped FTIC2 share the same terminal groups and side chains but different isomeric central cores. They share similar light absorption spectra in the 500–850 nm region and energy bandgaps, although FTIC2 shows a higher maximum molar absorptivity and electron mobility than FTIC1. Compared with the blend film of PM6/FTIC1, the active layer film of PM6/FTIC2 exhibits higher and more balanced hole and electron mobilities due to the influence of the nanoscale morphology. In terms of the photovoltaic performance of the organic solar cells, the FTIC2‐based devices afford a higher efficiency of 11.7% with short‐circuit current density ( J SC ) of 17.2 mA cm −2 than FTIC1‐based devices (8.98%).