Characteristics of up-conversion phosphor prepared by metal–organic decomposition method

Abstract

Oxides can be formed from many materials by air sintering after coating a substrate with a metal–organic decomposition (MOD) solution. This enables the preparation of thin films by simple processes such as spin coating. The up-conversion (UC) phosphor produced by the MOD method has a multifunctional potential for use in applications such as displays and solid-state lighting. In this study, a simple TiO2–ZnO mixed oxide system was examined for use as the base material and host crystal of rare-earth (RE) elements for UC phosphor. The maximum emission luminescence of the UC phosphor was obtained when the mixing ratios of the base materials TiO2 : ZnO and additive materials Yb2O3 : Er2O3 were and , respectively. When the mixing ratio of the phosphor, Ti : Zn : Yb : Er, was , 550 nm green and 650 nm red emissions were produced. The UC emission intensity could be controlled by varying the mixing ratio of the rare-earth materials.