1. Department of Physics University of Sialkot (USKT) 1‐Km Main Daska Road Sialkot Punjab 51040 Pakistan
2. Solar Cell Applications Research Lab Department of Physics Government College University Lahore Lahore Punjab 54000 Pakistan
3. State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China
4. Department of Chemistry and Applied Biosciences Institute for Chemical and Bioengineering ETH Zurich Hönggerberg, HCl Zurich CH‐8093 Switzerland