Highly Efficient Sky-Blue Perovskite Light-Emitting Diode Via Suppressing Nonradiative Energy Loss

Zhaohua Zhu; Yan Wu; Yang Shen; Jihua Tan; Dong Shen; Ming-Fai Lo; Menglin Li; Yi Yuan; Jian-Xin Tang; Wenjun Zhang; Sai-Wing Tsang; Zhiqiang Guan; Chun-Sing Lee

doi:10.1021/acs.chemmater.1c00903

Author(s)

Yang Shen
Ming-Fai Lo
Yi Yuan
Jian-Xin Tang
Wenjun Zhang
Sai-Wing Tsang
Zhiqiang Guan
Chun-Sing Lee

Related Research Unit(s)

Detail(s)

Original language	English
Pages (from-to)	4154–4162
Journal / Publication	Chemistry of Materials
Volume	33
Issue number	11
Online published	27 May 2021
Publication status	Published - 8 Jun 2021

Link(s)

DOI	DOI https://doi.org/10.1021/acs.chemmater.1c00903 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85108429005&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(978dbc0e-79f0-48bb-9606-1cba2d706535).html

Abstract

Metal halide perovskites show significant promise for light-emitting diodes (LEDs) because of superior optoelectronic properties, such as direct band gap, excellent mobilities, and high color purity. Blue perovskite LEDs (PeLEDs), however, still suffer from inferior performance compared with green and near-infrared counterparts. Here, we report a highly efficient sky-blue PeLED operating with an external quantum efficiency of 13.8% based on a quasi-two-dimensional structure. The outstanding efficiency arises from simultaneously suppressing both triplet and trap-assisted nonradiative energy loss via using a ligand with high-triplet-energy and dual-functional passivation groups. Our work proposes a universal strategy to improve the efficiency of sky-blue PeLEDs.

Citation Format(s)

[ RIS ] [ BibTeX ]

Highly Efficient Sky-Blue Perovskite Light-Emitting Diode Via Suppressing Nonradiative Energy Loss. / Zhu, Zhaohua ; Wu, Yan; Shen, Yang et al.

In: Chemistry of Materials, Vol. 33, No. 11, 08.06.2021, p. 4154–4162.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Zhu, Z , Wu, Y, Shen, Y, Tan, J , Shen, D, Lo, M-F, Li, M, Yuan, Y, Tang, J-X, Zhang, W , Tsang, S-W, Guan, Z & Lee, C-S 2021, 'Highly Efficient Sky-Blue Perovskite Light-Emitting Diode Via Suppressing Nonradiative Energy Loss', Chemistry of Materials, vol. 33, no. 11, pp. 4154–4162. https://doi.org/10.1021/acs.chemmater.1c00903

Zhu, Z., Wu, Y., Shen, Y., Tan, J., Shen, D., Lo, M-F., Li, M., Yuan, Y., Tang, J-X., Zhang, W., Tsang, S-W., Guan, Z., & Lee, C-S. (2021). Highly Efficient Sky-Blue Perovskite Light-Emitting Diode Via Suppressing Nonradiative Energy Loss. Chemistry of Materials, 33(11), 4154–4162. https://doi.org/10.1021/acs.chemmater.1c00903

Zhu Z , Wu Y, Shen Y, Tan J , Shen D, Lo M-F et al. Highly Efficient Sky-Blue Perovskite Light-Emitting Diode Via Suppressing Nonradiative Energy Loss. Chemistry of Materials. 2021 Jun 8;33(11):4154–4162. Epub 2021 May 27. doi: 10.1021/acs.chemmater.1c00903

Zhu, Zhaohua ; Wu, Yan ; Shen, Yang et al. / Highly Efficient Sky-Blue Perovskite Light-Emitting Diode Via Suppressing Nonradiative Energy Loss. In: Chemistry of Materials. 2021 ; Vol. 33, No. 11. pp. 4154–4162.