High-Performance Blue Quasi-2D Perovskite Light-Emitting Diodes via Balanced Carrier Confinement and Transfer

Nano-Micro Letters

Kai Wang¹  Zhaojin Wang¹  Jiahao Yu¹  Rui Chen¹  Jiayun Sun²  Ruijia Zhang²  Xiangtian Xiao²  Zhenwei Ren²  Wallace C. H. Choy³  Yu Chen⁴ 

[1] Department of Electrical and Electronic Engineering, Southern University of Science and Technology, 518055, Shenzhen, People’s Republic of China;Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China;Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China;Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, 518055, Shenzhen, People’s Republic of China;School of Optoelectronic Science and Engineering, Soochow University, 215006, Suzhou, People’s Republic of China;

关键词: Blue perovskite LEDs;    Carrier confinement and transfer;    Defect passivation;    2-Dimentional;   

DOI  :  10.1007/s40820-022-00807-7

来源: Springer

【 摘 要 】

tsA new concept to optimize the passivating agents for the balance of the carrier confinement and transfer in blue quasi-2D perovskites.The moderate tributylphosphine oxide is introduced into the quasi-2D perovskites to simultaneously strengthen the carrier confinement for massive radiative recombination as well as promote efficient carrier transfer in the quasi-2D perovskites.High-efficient and stable blue PeLEDs are achieved with an external quantum efficiency of 11.5% and a very long operational stability of 41.1 min without any shift of the electroluminescence spectra.

【 授权许可】

CC BY