Wide band gap semiconductor laser technology and characterization.- Growth and characterization of GaN-based lasers on silicon substrates.- Efficiency characterization of GaN-based LEDs.- Preparation and optoelectronic properties of GaN-based Micro-LEDs.- Key factors restricting the external quantum efficiency of GaN-based micro-LEDsand solutions.- Growth and optical characterization of non-polar and semi-polar GaN-based LEDs.- Construction and characterization of ZnO micro-nano lasers.- Ga2O3 solar blind deep ultraviolet detectors.

- Optoelectronic properties and characterization of gallium-doped ZnO.- Optoelectronic process characterization of localized carriers in semiconductors and photovoltaic devices.- Photoluminescence properties and characterization of InGaN/GaN nanowire quantum dots.- Characterization of nonlinear optical properties of ZnO single crystals and micro-nano structures.