Book excerpt: Presenting a comprehensive overview of a rapidly burgeoning field blending solar cell technology with nanotechnology, the book covers topics such as solar cell basics, nanotechnology fundamentals, nanocrystalline silicon-based solar cells, nanotextured-surface solar cells, plasmon-enhanced solar cells, optically-improved nanoengineered solar cells, dye-sensitized solar cells, 2D perovskite and 2D/3D multidimensional perovskite solar cells, carbonaceous nanomaterial-based solar cells, quantum well solar cells, nanowire solar cells and quantum dot solar cells. The book provides an in-depth and lucid presentation of the subject matter in an elegant, easy-to-understand writing style, starting from basic knowledge through principles of operation and fabrication of devices to advanced research levels encompassing the recent breakthroughs and cutting-edge innovations. It will be useful for graduate and PhD students, scientists, and engineers. Key features: * Builds an integrated perspective of photovoltaics by highlighting the essential role of nanotechnology in each type of solar cell. * Performs simplified mathematical analysis of operational mechanisms of nanostructured solar cells supplemented with solved examples. * Enhances learning with clear explanations of technological advances and illustrative diagrams without sacrificing scientific rigor.