A. Pandikumar is a senior scientist at the Electro Organic and Materials Electrochemistry Division of the CSIR-Central Electrochemical Research Institute, Tamil Nadu, India. He obtained his PhD in chemistry (2014) from Madurai Kamaraj University, Tamil Nadu, India, and completed his postdoctoral fellowship (2014–2016) from the University of Malaya, Malaysia, under its High Impact Research Grant. He then joined the Functional Materials Division of the CSIR-Central Electrochemical Research Institute as a scientist. Dr Pandikumar’s current research involves the development of novel functional materials for photocatalysis, photoelectrocatalysis, dye-sensitized solar cells, perovsikte solar cells, water splitting, and electrochemical sensor applications. K. Jothivenkatachalam is a professor and head of the Department of Chemistry, Anna University BIT Campus, Tamil Nadu, India. He obtained his PhD in chemistry from the University of Madras, Tamil Nadu, India. His current research focuses on photocatalysis for energy and environmental applications, and his other research interests are functional materials, photocatalysis, photoelectrochemistry, photoelectrocatalysis, and dye-sensitized solar cells. S. Moscow is an assistant professor in the Department of Chemistry, University College of Engineering BIT Campus, Tamil Nadu, India. He has been a lecturer at AVVM Sri Pushpam College and an assistant professor at SASTRA Deemed University, Tamil Nadu, India. He has authored or co-authored book chapters and papers in publications of international repute. Dr Moscow’s areas of research are photochemistry, geochemistry, environmental sciences, and materials chemistry.