1. Department of Physics Indian Institute of Science Education and Research Bhopal Madhya Pradesh 462066 India
2. Empa—Swiss Federal Laboratories for Materials Science and Technology Dübendorf CH‐860 Switzerland
3. Polymer and Functional Materials Division Indian Institute of Chemical Technology Hyderabad Telangana 500007 India
4. Chemistry and Nanoscience Science Center National Renewable Energy Laboratory Golden CO 80401 USA
5. Laboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Zürich CH‐8093 Switzerland