Solar energy is a renewable source of energy. The field of photovoltaics (PV) studies the conversion of sunlight into electricity using semiconducting materials. This field explores the phenomenon of photovoltaic effect for energy conversion. PV technology is used to power orbiting satellites, spacecraft and to generate power in power grids. Research in photovoltaic technology strives to increase efficiency and reduce costs, while also exploring newer photovoltaic structures and technologies like perovskites, organic and polymer photovoltaic, etc. This book presents recent innovations in photovoltaic technologies in a comprehensive manner. It will provide innovative insights into the field of photovoltaic technology and systems. It will benefit engineers, experts and students working in this domain.