A Garnet-Based Ca 2 YZr 2 Al 3 O 12 :Eu 3+ Red-Emitting Phosphor for n-UV Light Emitting Diodes and Field Emission Displays: Electronic Structure and Luminescence Properties.

A series of Ca2 YZr2 Al3 O12 :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 Y2 O3 :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 Y2 O3 :Eu3+ phosphor. All the results indicate that the CYZA:Eu3+ has potential applications in both white LEDs and FEDs.