Colloids of lead chalcogenide titanium dioxide and their synthesis

摘要

The invention comprises the method of growing lead chalcogenide nanocrystals from the surface of titanium dioxide in organic solvents, lead chalcogenide/TiO2 nanocomposites colloids produced by the claimed method, and the application of lead chalcogenide/TiO2 nanostructures as an active absorbing element in nanocrystal-sensitized solar cells.

主权项

1. A method of preparing a lead chalcogenide/TiO2 nanocomposite colloid, the method comprising the steps of:
(A) injecting lead and chalcogenide precursors into a mixture of
(i) organically passivated TiO2 nanoparticles; and(ii) at least two surfactants capable of promoting the formation of lead chalcogenide nanocrystals directly onto the surface of said organically passivated TiO2 nanoparticles, and (B) forming lead chalcogenide nanocrystals on the surface of said organically passivated TiO2 nanoparticles.