A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films

  title={A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films},
  author={Brian C O'Regan and Michael Gr{\"a}tzel},
THE large-scale use of photovoltaic devices for electricity generation is prohibitively expensive at present: generation from existing commercial devices costs about ten times more than conventional methods1. Here we describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency. The device is based on a 10-µm-thick, optically transparent film of titanium dioxide particles a few… 

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