Spacer cation enabled dimension control for efficient and wavelength-tunable blue perovskite light-emitting diodes

Qingxiang Liu; Xinan Wu; Aidan H. Coffey; Hanjun Yang; Jee Yung Park; Qixuan Hu; Ke Ma; Chenhui Zhu; Yong Sheng Zhao; Letian Dou; Kang Wang

doi:10.1039/D5CC01292A

Spacer cation enabled dimension control for efficient and wavelength-tunable blue perovskite light-emitting diodes†

Qingxiang Liu,‡^ah Xinan Wu,‡^bc Aidan H. Coffey,^d Hanjun Yang,

^be Jee Yung Park,

^bfg Qixuan Hu,

^b Ke Ma,

^b Chenhui Zhu,

^d Yong Sheng Zhao,

^ah Letian Dou

*^be and Kang Wang

*^ah

Author affiliations

* Corresponding authors

^a Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
E-mail: kangwang@iccas.ac.cn

^b Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
E-mail: dou10@purdue.edu

^c School of Physics, Peking University, Beijing 100871, China

^d Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

^e Department of Chemistry, West Lafayette, Purdue University, USA

^f Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06511, USA

^g Energy Sciences Institute, Yale University, West Haven, CT 06516, USA

^h School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

This study explores a conjugated spacer molecule, biphenylethylammonium bromide (bPEA), to enable efficient dimension control in quasi-two-dimensional perovskites for blue light-emitting diodes. The incorporation of bPEA improves the optoelectronic properties, thereby delivering a peak external quantum efficiency of 7.0% at 483 nm and tunable emission from 493 to 466 nm.

This article is part of the themed collection: 2025 Emerging Investigators

Chemical Communications

Spacer cation enabled dimension control for efficient and wavelength-tunable blue perovskite light-emitting diodes†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Spacer cation enabled dimension control for efficient and wavelength-tunable blue perovskite light-emitting diodes

Social activity

Search articles by author

Spotlight

Advertisements