Luminescence Properties and Synthesis of SrMgAl10O17:Mn4+ Red Phosphor for White Light-Emitting Diodes

Abstract

A series of Mn⁴⁺ doped SrMgAl₁₀O₁₇ phosphors are synthesized by a conventional solid-state reaction method in air, and their crystal structure, morphology, and fluorescence properties are investigated. The luminescence properties show clearly that SrMgAl₁₀O₁₇:Mn⁴⁺ phosphor can be excited by UV (200–380 nm), near UV (380–420 nm), and blue (420–480 nm) bands of LEDs chip, and emits red light in the range of 600 nm to 750 nm with satisfying CIE chromaticity coordinates (0.7207, 0.2793). The optimal doping concentration of Mn⁴⁺ ion is ∼1 mol%, and its lifetime is ∼1.15 ms. The possible luminous mechanism of Mn⁴⁺ ion is discussed by Tanabe-Sugano diagram. These experiment results indicate that Mn⁴⁺ doped SrMgAl₁₀O₁₇ phosphors can be a potential application as a red-emitting phosphor candidate in white LEDs.