A Garnet-Based Ca₂YZr₂Al₃O₁₂:Eu³⁺ Red-Emitting Phosphor for n-UV Light Emitting Diodes and Field Emission Displays: Electronic Structure and Luminescence Properties

Abstract

A series of Ca₂YZr₂Al₃O₁₂:Eu³⁺ (CYZA) phosphors were successfully synthesized through conventional solid-state method. The electronic structure and their photoluminescence or cathodoluminescence properties were investigated in detail. Under n-UV excitation, the CYZA:Eu³⁺ exhibits more intense red emission than the commercial Y₂O₃:Eu³⁺ phosphor. A WLED lamp with good color render index was obtained by fabricating the phosphor with BAM:Eu²⁺ and LuAG:Ce³⁺ phosphors. The phosphor also exhibits red emission with high current saturation and high resistance under low voltage electron bombardment. The degradation resistance can be compared to the commercial Y₂O₃:Eu³⁺ phosphor. All the results indicate that the CYZA:Eu³⁺ has potential applications in both white LEDs and FEDs.