Dr. Abul Kalam received his PhD degree from Allahabad Central University, India in 2003. Since 2009, he was working as Assistant Professor in the Department of Chemistry at King Khalid University, Saudi Arabia. He is Associate Professor in the Department of Chemistry, King Khalid University since 2019. He published many research papers in high ranked journals more than 60 papers as well as he attended many international conferences. He supervised many bachelor and master students. At KKU, Dr. Kalam is exploring the fundamentals and applications of different materials for various energy harvesting, sensing and storage devices. His current research interests ranges from thin film devices, dye sensitised solar cell (DSSCs), perovskite solar cells, sensor, optical band gap engineering, waste water treatment and electroanalytical characterizations.