Characteristics of $ZnGa_2O_4$ phosphor prepared by Precipitation method and Solid-state reaction method

침전법과 고상반응법으로 제조한 $ZnGa_2O_4$ 형광체의 특성

  • Published : 2007.06.21

Abstract

The nano and micro-sized $ZnGa_2O_4$ phosphor were prepared by precipitation method and solid-state method. The luminescence, formation process and structure of phosphor powders were investigated by means of XRD, SEM and PL. The result of XRD analysis showed that $ZnGa_2O_4$ spinel structure was formed at as-prepared in the case of precipitation method. However, micro-sized phosphor was required high heating treatment to have a satisfactory spinel structure. The CL intensity of nano-sized phosphor was about 4-fold higher than that of micro-sized phosphor. The emission spectra of all $ZnGa_2O_4$ phosphor show a self activated blue emission band at around 420 nm in the wide range of 300~600 nm.

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