Room-Temperature Synthesis and Photoluminescence Properties of Mn-Doped Cs3ZnBr5 Perovskite

Abstract

This article presents the synthesis and characterization of Mn-doped Cs₃ZnBr₅ perovskite nanocrystals via a sol-gel, room-temperature (RT) solution-based method. X-ray diffraction analysis confirmed the successful incorporation of Mn²⁺ ions into the Cs₃ZnBr₅ host lattice by revealing slight shifts with increasing Mn²⁺ concentration. Field-emission scanning electron microscopy images revealed the agglomerated nature of the particles and distinct microstructural features that evolved with the Mn²⁺ content. Photoluminescence measurements showed strong green emission (520-535 nm) associated with Mn²⁺ ions in a tetrahedral environment, with emission intensities correlating strongly with doping levels. The calculated Commission Internationale de l’Eclairage color coordinates of Mn²⁺-doped Cs₃ZnBr₅ indicated high green color purity values up to 73.09% which implies its potential application for display applications. This RT sol-gel synthesis approach provides a scalable and energy-efficient method for fabricating Pb-free perovskites and lays the foundation for further development of environmentally friendly optoelectronic applications.