1. Solar Energy Research Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
2. NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
3. School of Chemical Science & Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
4. Department of Chemistry, Faculty of Science, K. N. Toosi University of Technology, Tehran, Iran