Third Generation Photovoltaics : Advanced Solar Energy Conversion Photovoltaics the direct conversion of sunlight to electricity is now the fastest growing technology for electricity generation. Present `first generation` products use the same silicon wafers as in microelectronics. `Second generation` thin films now entering the market have the potential to greatly improve the economics by eliminating material costs. Martin Green one of the worlds foremost photovoltaic researchers argues in this book that `second generation` photovoltaics will eventually reach its own material cost constraints engendering a `third generation` of high performance thin films. The book explores self consistently the energy conversion potential of advanced approaches for improving photovoltaic performance and outlines possible implementation paths.