Photoelectrochemical Engineering for Solar Harvesting: Chemistry, Materials, Devices provides an up-to-date appraisal of the photon engineering of innovative catalysts for solar energy harvesting. This book analyzes the overall progress, potential challenges, and the industrialization of new catalysts in the near future. The primary emphasis is on experimental approaches from materials synthesis to device applications, however, there is also an introduction to relevant photochemistry concepts. This book is suitable for materials scientists and chemists who, through the use of photonics, are in continuous pursuit of improving the efficiencies of different devices used to capture solar energy for the generation of sustainable fuel. Sunlight-driven fuel synthesis is the most sustainable and potentially economical option for producing energy vectors through water splitting. Thus, this book focuses on the design of photocatalysts and water oxidation catalysts, as artificial photosynthesis and hydrogen fuel production via water oxidation (in place of fossil fuels) are two promising approaches towards renewable energy.