Dr. Beddiaf Zaidi is an associate professor in the Department of Physics at the University of Batna 1, Algeria. He obtained a PhD in Physics from the University of Annaba, Algeria, in 2014. Dr. Zaidi has published a number of research papers in reputed journals and has written a book on solar cells. He is also a peer reviewer for journal articles and he previously served as an editor-in-chief of the International Journal of Materials Science and Applications (IJMSA). Dr. Zaidi has participated in many international conferences serving as a referee and a program committee member. He is on the editorial boards of numerous journals and is a lead guest editor for a number of special issues.