Tunable Luminescence of Sb<sup>3+</sup> Doped 0D Cs<sub>4</sub>PbCl<sub>6</sub> Nanocrystals from Three Distinct Emission Centers
Anran Zhang, Jiance Jin, Zhiguo Xia
Abstract
Abstract Metal halide nanocrystals (NCs) with multiple emission centers are high‐potential luminescent materials used in versatile optoelectronic applications. However, technical challenges hinder the achievement of tunable emission bands in single‐component NCs. In this study, by elaborately using 0D Cs 4 PbCl 6 to design Cs 4 PbCl 6 :Sb 3+ NCs, multiple photoluminescence excited at specific energies without energy transfer occurred owing to the isolated and distinct centers in the 0D frame. The three emission centers at 368, 450 and 570 nm can be assigned to the 3 P 1 → 1 S 0 transition of Pb 2+ ions, D‐state emission of Pb 2+ ions, and 3 P 1 → 1 S 0 transition of Sb 3+ ions, respectively. The emission colors of Cs 4 PbCl 6 :Sb 3+ NCs can be easily tuned from ultraviolet to yellow by precisely modulating the excitation wavelength, and white‐light emission at 360 nm excitation with a color coordinate of (0.3026, 0.3264) is obtained owing to the simultaneous activation of Sb 3+ ions and the D‐state. This study not only demonstrates a feasible scheme for designing multiple‐emitting metal halide NCs but also provides guidance for expansion of their applications in flexible optoelectronic devices.