This book examines topics related to photovoltaic generations, its unique scientific ideas and advances made in the solar cell technology. Extensive attention has been given to the significant effects in solar cells, both in common and on particular cases such as those of quantum dots, super-lattices, etc. Usage of advanced materials, like the oxide of copper as an active substance for solar cells, InP in solar cells with MIS arrangement, AlSb for use as an absorber layer, among others, have been included. Furthermore, other significant topics such as the analysis of both the status and prospects of organic photovoltaics such as photovoltaic textiles, photovoltaic fibers, etc. have also been discussed.