Details

Autor(en) / Beteiligte

• Xu, Ye
• Cui, Yong
• Yao, Huifeng
• Zhang, Tao
• Zhang, Jianqi
• Ma, Lijiao
• Wang, Jingwen
• Wei, Zhixiang
• Hou, Jianhui

Titel

A New Conjugated Polymer that Enables the Integration of Photovoltaic and Light‐Emitting Functions in One Device

Ist Teil von

• Advanced materials (Weinheim), 2021-06, Vol.33 (22), p.e2101090-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2021

Quelle

Access via Wiley Online Library

Beschreibungen/Notizen

• 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 cm2 device and 26.0% for a 10 cm2 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. A new wide‐bandgap conjugated polymer, PBQx‐TCl, exhibits 18% efficiency for outdoor application and 28.5% efficiency for indoor application. Simultaneously, the PBQx‐TCl‐based device also shows light‐emitting function with broad emission ranges from 630 to 1000 nm and moderate external quantum efficiency approaching 0.2%.