Luminescence characterization of LaOF:Yb3+/Er3+ up-conversion phosphor

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 LaF₃ 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 LaF₃ and additive materials Yb₂O₃:Er₂O₃ were 1:0.01:0.01, respectively. When the mixing ratio of the phosphor, LaF:Yb:Er, was 1:0.01:0.01, 550 nm green and 670 nm red emissions were produced. The UC emission intensity could be controlled by varying the mixing ratio of the rare-earth materials.