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Keywords:

  • dye-sensitized solar cells;
  • diffraction gratings;
  • light harvesting;
  • titanium dioxide
Thumbnail image of graphical abstract

A refractive-index grating is embedded in the bottom of the TiO2 absorption layer of a dye-sensitized solar cell via imprinting and subsequent TiCl4 treatment. This architecture has little influence on the dye coverage but greatly enhances light harvesting and photon-to-electron conversion efficiency by diffracting the incident light. A 24% increase in the photocurrent density is achieved.