This book covers the basic scientific background of solar cells, their principles, working, growth, operating parameters, commercialization status, manufacturing challenges, and future scope of solar cells. Topics covered range from history and developments of solar cell generation to market growth and different applications of solar cells including in depth knowledge about Si, PSCs, and next generation multilayer bandgap based solar cells and their fabrication techniques with advanced methodology. Key features: Explains solar cells and their growth at different stages Discusses challenges in the fabrication/commercialization of solar cells at the lab and industry levels Combines fundamental, experimental, and theoretical knowledge with industrial needs and engineering design methods Covers the new generation of perovskite solar cells and their synthesis techniques Explores multilayer graded bandgap solar cells and their importance in existing solar technology This book is specifically designed for graduate students and researchers in solar energy technology, cell device, and materials science.