1. Phosphor Research Group, Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Skudai, Malaysia
2. Department of Physics, School of Sciences, Kaduna State College of Education Gidan Waya, Kafanchan, Nigeria
3. Department of Physics, Faculty of Science, Taibah University, Madinah, Saudi Arabia
4. Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
5. Advanced Optical Materials Research Group & Laser Centre, Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Skudai, Malaysia
6. okoto Energy Research Centre, Usmanu Danfodiyo University, Sokoto, Nigeria
7. Department of Physics, Faculty of Science, Air Force Institute of Technology (AFIT), Kaduna, Nigeria