The book presents current R&D and new trends in the field of solar cell technologies. Topics covered include fabrication methods various types of cell design versatile applications of solar cells PEDOT: PSS thermoelectric materials transparent conducting electrodes simulation models for solar photovoltaic materials and hybrid materials for solar cells.Keywords: Optoelectronic Devices PEDOT: PSS Materials Nanomaterials Transparent Electrodes Hybrid Solar Cell Materials Simulation Models Solar Cell Design Solar Cell Applications.