Abstract
A series of novel red-emitting phosphors BaZrGe3O9 : Mn4+ (BZG : Mn4+) were synthesized through high-temperature solid-state reaction method in order to explore their capabilities for application as red-emitting phosphors. The phosphors were characterized by X-ray diffraction, photoluminescence spectra, and decay curve measurements at the temperature ranging from 80 to 500 K. The luminescence intensity increases to maximum at doping concentration of 0.2 mol.%, and then decreases with concentration. Serious thermal quenching was also revealed. Keywords: red-emitting phosphor, germanate, Mn4+, concentration quenching, thermal stability.
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