Emerging photovoltaic technologies offer new applications for solar cells not easily met with current technologies, such as ultra-low cost, light-weight, flexible, portable, wearable, semi-transparent or coloured devices. Various approaches have sought to address this opportunity, including organic and dye-sensitised PV. Using related materials and fabrication approaches, perovskite solar cells have recently brought about a paradigm shift in efficiencies of low-cost solution-based photovoltaics. The talk will present several different designs of hybrid organic-inorganic PV cells, based on mesoporous metal oxides combined with organic dyes or hole-transporting materials. The aim will be to highlight the diversity of materials and device architectures used in emerging PV devices, as well as to indicate the limitations and challenges still to be addressed.