Electric dipole modulation for boosting carrier recombination in green InP QLEDs under strong electron injection†

Tianqi Zhang,Pai Liu, Fangqing Zhao, Yangzhi Tan, Jiayun Sun, Xiangtian Xiao, Zhaojing Wang, Qingqian Wang, Fankai Zheng, Xiao Wei Sun, Dan Wu, Guichuan Xing and Kai Wang

Nanoscale Adv., 2023, 5, 385

https://doi.org/10.1039/d2na00705c

Researchers introduced an electric dipole layer in green InP QLEDs to enhance hole injection and balance carrier injection. This approach increased the carrier recombination rate, resulting in a high luminance of 52,730 cd m−2 and a 1.7 times EQE enhancement from 4.25% to 7.39%, paving the way for highly efficient green InP QLEDs.

Electrical simulations were performed with Setfos, while the constant or field-dependent electron and hole mobilities according to the Poole–Frenkel model were used in the simulations.