Xu Ye, Cui Yong, Yao Huifeng, Zhang Tao, Zhang Jianqi, Ma Lijiao, Wang Jingwen, Wei Zhixiang, Hou Jianhui
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, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2021 Jun;33(22):e2101090. doi: 10.1002/adma.202101090. Epub 2021 Apr 25.
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 device and 26.0% for a 10 cm 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.
探索有机半导体引人入胜的双功能特性并研究制造双功能器件的可行性对于利用一个器件实现各种应用具有重要意义。在此，报道了一种名为PBQx-TCl的新型宽带隙聚合物（光学带隙为2.05 eV）的设计，并研究了其在光伏和发光器件中的应用。通过用非富勒烯受体BTA3和BTP-eC9制造器件，结果表明，在空气质量1.5G光照条件下，器件表现出18.0%的高功率转换效率（PCE），在1000勒克斯发光二极管照明下，1 cm器件的PCE高达28.5%，10 cm器件的PCE为26.0%。此外，基于PBQx-TCl:BTA3的器件还展示了适度的有机发光二极管性能，电致发光外量子效率接近0.2%，发射范围宽达630 - 1000 nm。这些结果表明，基于聚合物PBQx-TCl的器件展现出卓越的光伏性能和潜在的发光功能。
