Energy and Optoelectronics, Semiconductor Physics and Device, Thin film devices, Interface and Surface Modification, Ion irradiation and implantation , Halide Perovskite and Organic semiconductors, Solar cells, LEDs, Memory device, and Transparent Electrode, Energy storage (Supercapacitor and Batteries) , Renewable Energy (Photovoltaic- Space PV, BIPV, Agri-PV, Tandem & Transparent Cells), Coatings and Optics , Sensors and detectors .