A major loss mechanism in dye-sensitized solar cells (DSCs) is recombination at the TiO 2/electrolyte interface. Here we report a method to reduce greatly this loss mechanism. We deposit insulating and transparent silica (SiO 2) onto the open areas of a nanoparticulate TiO 2 surface while avoiding any deposition of SiO 2 over or under the organic dye molecules. The SiO 2 coating covers the highly convoluted surface of the TiO 2 conformally and with a uniform thickness throughout the thousands of layers of nanoparticles. DSCs incorporating these selective and self-aligned SiO 2 layers achieved a 36% increase in relative efficiency versus control uncoated cells.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of the American Chemical Society|
|State||Published - Jun 13 2012|
ASJC Scopus subject areas
- Colloid and Surface Chemistry