A solar cell refers to a type of electrical device that uses the photovoltaic effect to transform light into electricity. The utilization of nanotechnology and nanostructures in photovoltaics has the potential for increasing the efficiency of solar cells, either through the application of novel physical mechanisms or by developing solar cells with efficiencies that are closer to their theoretical maximum. Nanostructured solar cells are significant for generating renewable energy. They are also environmentally friendly. The nano-grating structures have a progressive change in refractive index. This functions as a multilayer antireflective coating, which helps in decreasing light reflection losses across the broadband range of incidence angles and wavelengths. The nanostructured solar cells are balanced between efficiency and cost. This book contains some path-breaking studies on solar cell nanotechnology. It elucidates the concepts and innovative models around prospective developments with respect to nanostructured solar cells. This book will serve as a reference to a broad spectrum of readers.