Optical characteristics of LiZnVO4 green phosphor at low temperature preparation

Hsiao, Yu-Jen, Chai, Yin-Lai, Ji, Liang-Wen, Fang, Te-Hua, Meen, Teen-Hang, Tsai, Jenn-Kai, Chen, Kan-Lin and Prior, Stephen D. (2012) Optical characteristics of LiZnVO4 green phosphor at low temperature preparation. Materials Letters, 70 . pp. 163-166. ISSN 0167-577X [Article] (doi:10.1016/j.matlet.2011.11.076)

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Abstract

Photoluminescence characterization of LiZnVO4 oxides by the vibrating milled solid-state reaction was investigated in this work. The products were characterized by X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy and absorption spectra. The excitation wavelengths associated with charge transfer bands of [VO4]3− are located at 355 nm. The photoluminescence results reveal that the sample prepared at 500 °C exhibits a broad and strong bluish green emission peaks at about 526 nm compared with other samples. Furthermore, the visible light absorption edge of the LiZnVO4 annealed at 500 °C was located at 413 nm, which corresponded to band-gap energy of 3.0 eV.

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