Diffractive Neural Network on a 3D Photonic Device for Spatial Mode Bases Mapping (Laser Photonics Rev. 18(12)/2024)

Abstract

Boosting Ce³⁺ Ion Luminescence Efficiency in Cs₂ZnCl₄ Nanorods

Due to inefficient intersystem crossing and intense non-radiative decay of host phosphors, most cerous (Ce³⁺)-doped luminophores exhibit low luminescence efficiency, with photoluminescence quantum yield (PLQY) typically lower than 50%. In this work (see article number 2400525 by Jun Zhu, Feng Liu, and co-workers), Ce³⁺ ions were incorporated into cesium zinc chloride (Cs₂ZnCl₄) nanorods, which exhibit a ≈100% PLQY upon excitation of the host or direct Ce³⁺ excitation. Furthermore, a highly pure Ce³⁺ emission spectrum, devoid of any additional emission from Cs₂ZnCl₄, was obtained, showcasing potential for high-performance violet light-emitting devices.