This Book "Properties of Magnesium doped Antimony Sulphide Thin Films" focuses on the Morphological and optical Properties of Chemically deposited Magnesium doped Antimony sulphide thin films for application in optoelectronic devices and in other related applications. The research was carried out both in Ebonyi State University Abakaliki and at the Center for Research, Obafemi Awolowo University Ile-Ife. The raw data obtained from the characterization of the deposited Antimony Sulphide films were analysed using Origin Lab software. This book will be useful for scholars, researchers and students in various disciplines such as material science, solar energy physics and solid state physics.