典型文献
Design of ultranarrow-bandgap acceptors for efficient organic photovoltaic cells and highly sensitive organic photodetectors
文献摘要：
The fabrication of multifunctional electronic devices based on the intriguing natures of organic semicon-ductors is crucial for organic electronics.Ultranarrow-bandgap materials are in urgent demand for fab-ricating high-performance organic photovoltaic(OPV)cells and highly sensitive near-infrared organic photodetectors(OPDs).By combining alkoxy modification and an asymmetric strategy,three narrow-bandgap electronic acceptors(BTP-4F,DO-4F,and QO-4F)were synthesized with finely tuned molecular electrostatic potential(ESP)distributions.Through the careful modulation of electronic configurations,the optical absorption onsets of DO-4F and QO-4F exceeded 1 μm.The experimental and theoretical results suggest that the small ESP of QO-4F is beneficial for achieving a low nonradiative voltage loss,while the large ESP of BTP-4F can help obtain high exciton dissociation efficiency.By contrast,the asym-metric acceptor DO-4F with a moderate ESP possesses balanced voltage loss and exciton dissociation,yielding the best power conversion efficiency of 13.6％in the OPV cells.OPDs were also fabricated based on the combination of PBDB-T:DO-4F,and the as-fabricated device outputs a high shot-noise-limited specific detectivity of 3.05×1013 Jones at 850 nm,which is a very good result for near-infrared OPDs.This work is anticipated to provide a rational way of designing high-performance ultranarrow-bandgap organic semiconductors by modulating the molecular ESP.
文献关键词：
中图分类号：
作者姓名：
Ye Xu;Tao Zhang;Huifeng Yao;Jingwen Wang;Pengqing Bi;Jianhui Hou
作者机构：
Beijing National Laboratory for Molecular Sciences,State Key Laboratory of Polymer Physics and Chemistry,CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
文献出处：
引用格式：
[1]Ye Xu;Tao Zhang;Huifeng Yao;Jingwen Wang;Pengqing Bi;Jianhui Hou-.Design of ultranarrow-bandgap acceptors for efficient organic photovoltaic cells and highly sensitive organic photodetectors)[J].能源化学,2022(09):388-394
A类：
Ultranarrow,alkoxy
B类：
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AB值：
0.516887
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