Tunable deep-blue luminescence from ball-milled chlorine-rich Csx(NH4)1- xPbCl2Br nanocrystals by ammonium modulation

Hongfei Xiao; Hao Xiong; Ping Li; Linqin Jiang; Aijun Yang; Lingyan Lin; Zhenjing Kang; Qiong Yan; Yu Qiu

doi:10.1039/d1cc07125d

Tunable deep-blue luminescence from ball-milled chlorine-rich Cs_x(NH₄)_{1- x}PbCl₂Br nanocrystals by ammonium modulation

Chem Commun (Camb). 2022 Mar 18;58(23):3827-3830. doi: 10.1039/d1cc07125d.

Authors

Hongfei Xiao^{1

2}, Hao Xiong², Ping Li², Linqin Jiang², Aijun Yang³, Lingyan Lin², Zhenjing Kang², Qiong Yan^{1

2}, Yu Qiu²

Affiliations

¹ College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China.
² Key Laboratory of Green Perovskites Application of Fujian Provincial Universities, College of Electronics and Information Science, Fujian Jiangxia University, Fuzhou 350108, China. yuqiu@fjjxu.edu.cn.
³ PV Metrology Institute, Fujian Metrology Institute, Fuzhou 350003, China.

PMID: 35234752
DOI: 10.1039/d1cc07125d

Abstract

For the first time, a novel class of deep-blue (DB)-emitting Cs_x(NH₄)_1-xPbCl₂Br (0.3 ≤ x ≤ 1) perovskite nanocrystals (PNCs) were prepared by a facile ligand-assisted one-step ball milling method. The resulted PNCs are characterized by high chlorine content (66.7%) and excellent color purity. Their photoluminescence position can be finely modulated from 434 nm to 447 nm, which extends notably beyond the current Rec. 2020 color standard, by the NH₄⁺ content. Among them, Cs_0.3(NH₄)_0.7PbCl₂Br shows the highest quantum yield close to 40%. The PNCs exhibit high phase and optical stability under ambient conditions and UV light according to the NH₄⁺ content. This work offers a new avenue to produce DB perovskites for future full-color displays and optoelectronics.