Affiliation: | 1.Department of Physics, Koneru Lakshmaiah Education Foundation, Green Fields, Guntur District, Vaddeswaram, Andhra Pradesh, 522502, India ;2.Research Centre for Solar Energy, Department of Physics, Koneru Lakshmaiah Education Foundation, Green Fields, Guntur District, Vaddeswaram, Andhra Pradesh, 522502, India ;3.Dhanalakshmi College of Engineering, Tambaram, Chennai, Tamil Nadu, 601301, India ; |