1. Semiconductor and Photovoltaics Lab, Department of Physics, Manipal Academy of Higher Education, Manipal Institute of Technology, Manipal 576104, Karnataka, India
2. Catalysis and Materials Chemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, Karnataka, India
3. Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India