1. Centre for Advanced Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032 (India)
2. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)
3. Department of Physics & CSRRI, Illinois Institute of Technology, Chicago, IL 60616 (USA)
4. Council of Scientific and Industrial Research—Network of Institutes for Solar Energy (CSIR‐NISE), New Delhi 110001 (India)