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A New Conjugated Polymer that Enables the Integration of Photovoltaic and Light‐Emitting Functions in One Device
Author(s) -
Xu Ye,
Cui Yong,
Yao Huifeng,
Zhang Tao,
Zhang Jianqi,
Ma Lijiao,
Wang Jingwen,
Wei Zhixiang,
Hou Jianhui
Publication year - 2021
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.202101090
Subject(s) - materials science , electroluminescence , optoelectronics , bifunctional , photovoltaic system , light emitting diode , diode , band gap , polymer , energy conversion efficiency , semiconductor , nanotechnology , electrical engineering , chemistry , biochemistry , engineering , layer (electronics) , composite material , catalysis
Exploring the intriguing bifunctional nature of organic semiconductors and investigating the feasibility of fabricating bifunctional devices are of great significance in realizing various applications with one device. Here, the design of a new wide‐bandgap polymer named PBQx‐TCl (optical bandgap of 2.05 eV) is reported, and its applications in photovoltaic and light‐emitting devices are studied. By fabricating devices with nonfullerene acceptors BTA3 and BTP‐eC9, it is shown that the devices exhibit a high power conversion efficiency (PCE) of 18.0% under air mass 1.5G illumination conditions and an outstanding PCE of 28.5% for a 1 cm 2 device and 26.0% for a 10 cm 2 device under illumination from a 1000 lux light‐emitting diode. In addition, the PBQx‐TCl:BTA3‐based device also demonstrates a moderate organic light‐emitting diode performance with an electroluminescence external quantum efficiency approaching 0.2% and a broad emission range of 630–1000 nm. These results suggest that the polymer PBQx‐TCl‐based devices exhibit outstanding photovoltaic performance and potential light‐emitting functions.