SYNTHESIS AND CHARACTERIZATION OF Li2ZnSn2O6:Mn4+ PHOSPHORS BY USING SOLID–STATE REACTIONMETHOD

Abstract

In this study, red-emitting Li₂ZnSn₂O₆:Mn⁴⁺ material was synthesized by solid method. The effect of temperature on the crystal structure of Li2ZnSn2O6 was investigated by X-ray diffraction (XRD), and the surface morphology of the material was investigated by field emission scanning electron microscope method (FE-SEM), analysis of optical properties using photoluminescence and photoluminescence excitation (PL, PLE) spectra. XRD results of Li₂ZnSn₂O₆:Mn⁴⁺ material show that the material is formed and single-phase when heated at 950 and 1000 ^oC. When heated at 1050 and 1100 ^oC, in addition to the crystalline phase of Li₂ZnSn₂O₆, SnO₂ also appears. Observing the surface morphology of the material calcined at 1000 ^oC, the grain sizes are about 200 ÷ 500 nm. The excitation spectrum of Li₂ZnSn₂O₆:Mn⁴⁺ consists of 260 ÷ 410 nm, 410 ÷ 560 nm, and the emission spectrum consists of two bands pecking at 658 nm and 672 nm.