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廖良生教授课题组、王照奎教授课题组及其合作者在Adv. Mater.上发表论文
发布时间:2021-11-08 点击:10

题目:

Efficient and Spectrally Stable Blue Perovskite Light-Emitting Diodes Employing a Cationic π-Conjugated Polymer


作者:

Shuai Yuan,1,2 Lin-Song Cui,2,3,* Lin-Jie Dai,3 Yun Liu,3 Qing-Wei Liu,1 Yu-Qi Sun,3 Florian Auras,3 Miguel Anaya,3 Xiao-Peng Zhen,4 Edoardo Ruggeri,3 You-Jun Yu,1 Yang-Kun Qu,1 Mojtaba Abdi-Jalebi,3 Osman M. Bakr,4 Zhao-Kui Wang,1,* Samuel D. Stranks,3 Neil C. Greenham,3 Liang-Sheng Liao,1,* Richard H. Friend3,*


单位:

1 Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University Suzhou, Jiangsu 215123, China

2 Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China

3 Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK

4 Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia


摘要:

Metal halide perovskite semiconductors have demonstrated remarkable potentials in solution-processed blue light-emitting diodes (LEDs). However, the unsatisfied efficiency and spectral stability responsible for trap-mediated non-radiative losses and halide phase segregation remain the primary unsolved challenges for blue perovskite LEDs. In this study, it is reported that a fluorene-based π-conjugated cationic polymer can be blended with the perovskite semiconductor to control film formation and optoelectronic properties. As a result, sky-blue and true-blue perovskite LEDs with Commission Internationale de l’Eclairage coordinates of (0.08, 0.22) and (0.12, 0.13) at the record external quantum efficiencies of 11.2% and 8.0% were achieved. In addition, the mixed halide perovskites with the conjugated cationic polymer exhibit excellent spectral stability under external bias. This result illustrates that π-conjugated cationic polymers have a great potential to realize efficient blue mixed-halide perovskite LEDs with stable electroluminescence.


影响因子:

27.398


分区情况:

一区


链接:

https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202103640


责任编辑:向丹婷


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