材料科学
电致发光
吡咯
光伏系统
有机太阳能电池
光电子学
光化学
带隙
纳米技术
有机化学
复合材料
电气工程
聚合物
图层(电子)
工程类
化学
作者
Wenxuan Wang,Jingwen Wang,Yong Cui,Zi Li,Jianqiu Wang,Chaoyi Wang,Zhihao Chen,Jiawei Qiao,Xiaotao Hao,Jianhui Hou
标识
DOI:10.1002/aenm.202303605
摘要
Abstract High electroluminescence of acceptors can effectively decrease nonradiative energy losses and improve the performance of organic photovoltaic (OPV) cells. Pyrrole ring is a promising building block to enhance the electroluminescence of acceptors, while pyrrole‐based acceptors with medium bandgap are rarely reported. Here, two medium‐gap acceptors named FICC‐EH and FICC‐BO are synthesized. Both acceptors exhibit strong electroluminescence properties, giving satisfying quantum efficiency (QE) of 0.1% in organic light‐emitting diodes (OLEDs). Moreover, PBQx‐TF:FICC‐BO presents a longer film formation process due to the longer alkyl chains. This contributes to more distinct fibril‐network morphology and ordered molecular stacking, thus increasing carrier mobility and suppressing charge recombination. Consequently, benefiting from decreased energy losses, PBQx‐TF:FICC‐BO‐based OPV cells reach a PCE of 12.0% with a V OC of 1.04 V under AM 1.5G and achieve a PCE of 25.4% under 1000 lux LED. This work demonstrates the potential of pyrrole for constructing medium‐gap acceptors with strong electroluminescence for photovoltaic applications.
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