This book presents the select proceedings of the International Conference on Advanced Functional Materials and Devices (AFMD 2021). It highlights the advancements in area of functional materials which includes electronic, magnetic, optical, adaptive and dielectric materials that are required to develop new functionalities with better performance in this new era of technology. The topics covered include materials for energy harvesting, biomedical applications, environmental monitoring, photonics and optoelectronic devices, strategic applications and high energy physics. This book will be a useful reference for beginners, researchers, academicians and professionals working in the area of material science and its allied fields.