Sintering Condition and Optical Properties of Zn₃V₂O₈ Phosphor

Tingting Li, Jiaolian Luo, Zentaro Honda, Takeshi Fukuda, Norihiko Kamata

Graduate School of Science and Engineering, Saitama University, Saitama, Japan.

DOI: 10.4236/ampc.2012.23026                

Abstract

One of promising phosphors in vanadium oxide family, Zn₃V₂O₈, was successfully synthesized by a solid state reaction of ZnO and V₂O₅. Characterization by XRD, photoluminescence (PL) and SEM was done for samples with different temperature and time in the sintering process. Residual percentage of secondary Zn₂V₂O₇ phase, subsidiary ZnO and Zn₄V₂O₉ phases was dependent on the sintering condition. The crystalline purity (CP) was defined by the integral intensity ratio of Zn₃V₂O₈ phase and that of residual phases in XRD spectra, which showed a reasonable correspondence to the PL quantum yield (QY) of each sample. The highest QY exceeding 50% was obtained by the sintering condition of 750?C for 48 h. It turned out that the CP value is a good measure of high QY, which can be utilized for developing phosphor materials and controlling their processes.

Keywords

Zn₃V₂O₈ Phase; XRD; Crystalline Purity; Internal Quantum Efficiency; Photoluminescence

Conflicts of Interest

The authors declare no conflicts of interest.

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