Institution: | 1. State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China;2. Department of Physics, Bahauddin Zakariya University, Multan, 60800, Pakistan;3. Department of Physics, University of Okara, Okara, 56300, Pakistan;4. Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan |