Cathodoluminescence of blue ZnGa2O4 with In2O3-mixed phosphor

In this work, the cathodoluminescence (CL) of the ZnGa2O4 phosphor for different composition ratios of ZnO/Ga2O3 is examined, and its emission behavior is compared with that of ZnGa2O4 with In2O3-mixed phosphor. The wavelength and intensity of CL vary with the crystallization of phosphor; as a consequence, the optimal crystallization and luminescence are obtained when the molar ratio of ZnO/Ga2O3 is 1. The luminance intensity is 4.2 times enhanced when phosphor is mixed with 12 wt.% of In2O3. A maximum luminance of 503 cd/m2 and a optimal conductivity of 0.69 (MΩ m)−1 of phosphor are obtained. The CL of blue ZnGa2O4 phosphor will be enhanced by In2O3 mixed.