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Keywords:

  • hydrogen generation;
  • inverse opals;
  • photoelectrochemical cells;
  • photonic crystals;
  • quantum dots
Thumbnail image of graphical abstract

A nanoarchitectured photoelectrode based on TiO2 inverse opals and CdS quantum dot sensitization is used for solar hydrogen generation. The 3D percolated periodical pore structure of TiO2 inverse opal provides a high surface area for sensitizer loading plus a good electrical transport path and intimate contact with the electrolyte, all of which contribute to the photoelectrochemical performance. The inverse opals provide a unique platform for further hybridization with other photoactive nanostructures and enhancement of light manipulation.