A butterfly-shaped acceptor with rigid skeleton and unique assembly enables both efficient organic photovoltaics and high-speed organic photodetectors  

作　　者：Wendi Shi Qiansai Han Yu Zhu Yingjun Xia Tengfei He Shijie Wang Longyu Li Wei Ma Guankui Long Guanghui Li Zhaoyang Yao Chenxi Li Xiangjian Wan Yongsheng Chen 

机构地区：[1]State Key Laboratory of Elemento-Organic Chemistry,Frontiers Science Center for New Organic Matter,The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials,Institute of Polymer Chemistry,Renewable Energy Conversion and Storage Center(RECAST),Tianjin Key Laboratory of Functional Polymer Materials,Nankai University,Tianjin 300071,China [2]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China [3]School of Materials Science and Engineering,National Institute for Advanced Materials,Renewable Energy Conversion and Storage Center(RECAST),Nankai University,Tianjin 300350,China

出　　处：《National Science Review》2025年第1期212-222,共11页国家科学评论(英文版)

基　　金：supported by the National Natural Science Foundation of China(52025033,52373189,21935007 and 22361132530);the National Key R&D Program of China(2022YFB4200400,2019YFA0705900,2023YFE0210400 and 2022YFA1203304);the Natural Science Foundation of Tianjin,China(23JCZDJC01160).

摘　　要：It remains challenging to design efficient bifunctional semiconductor materials in organic photovoltaic and photodetector devices.Here,we report a butterfly-shaped molecule,named WD-6,which exhibits low energy disorder and small reorganization energy due to its enhanced molecular rigidity and unique assembly with strong intermolecular interaction.The binary photovoltaic device based on PM6:WD-6 achieved an efficiency of 18.41%.Notably,an efficiency of 19.42%was achieved for the ternary device based on PM6:BTP-eC9:WD-6.Moreover,the photodetection device based on WD-6 demonstrated an ultrafast response speed(205 ns response time atλof 820 nm)and a high cutofffrequency of−3 dB(2.45 MHz),surpassing the values of most commercial Si photodiodes.Based on these findings,we showcased an application of the WD-6-based photodetection device in high-speed optical communication.These results offer valuable insights into the design of organic semiconductor materials capable of simultaneously exhibiting high photovoltaic and photodetective performance.

关 键 词：organic photovoltaics organic photodetectors electron acceptor efficiency response speed 

分 类 号：TQ317[化学工程—高聚物工业]