Innovations in Solar Thermal Energy: Techniques to Enhance Photovoltaic-Thermal System Efficiency brings together cutting-edge methods and approaches for improved photovoltaics and photovoltaic thermal system efficiency. The book begins by introducing photovoltaic (PV) technologies, principles, types, and basic performance enhancement techniques for photovoltaic cells. This is followed by in-depth chapters examining specific areas of innovation that offer routes to improved efficiency, including nanofluid cooling, thermal energy storage using a paraffin layer, confined jet impingement cooling, nanofluid spectral filters, phase change material (PCM) spectral filters, cooling strategies for concentrated photovoltaic thermal (CPVT) systems, integration photovoltaic thermal (PVT) systems with heat pipes, dust accumulation and self-cleaning, and double-glazed photovoltaics for building applications. This is a useful and stimulating resource for all those working on the performance and efficiency of photovoltaics and solar thermal energy, including researchers, advanced students, faculty, engineers, designers, R&D, and policy makers.