• atomic layer deposition;
  • cadmium sulfide;
  • quantum dot-sensitized solar cells;
  • self-assembled monolayers;
  • titanium dioxide
Thumbnail image of graphical abstract

CdS quantum dots are grown during the nuclea-tion phase of atomic layer deposition (ALD) and harvest light in a quantum dot-sensitized solar cell (QDSSC), report Stacey Bent, Michael McGehee, and co-workers on p. 1169. Dimethylcadmium molecules are shown penetrating a nanoporous TiO2 substrate and reacting with surface sites on the CdS quantum dots. Once filled with a solid-state hole conductor, the quantum dots—whose bandgaps are functions of the number of ALD cycles performed—absorb photons and inject excited electrons into the TiO2.