We focus on the spin-polarized excitonic emission in metal halide perovskites and ZnO nanomaterials. In a high magnetic field (0-50 T) and low temperature (4.2-300 K), the magneto-photoluminescence, electro-luminescence, and absorption spectra were measured by using 

sophisticated home-built equipments. The research results would be useful for advancing the related applications in semiconductor spintronics.