Charge Transfer Reductive in situ Doping of Mesoporous TiO₂ Photoelectrodes - Impact of Electrolyte Composition and Film Morphology.

ABSTRACT: Some material properties depend not only on synthesis and processing parameters, but may furthermore significantly change during operation. This is particularly true for high surface area materials. We used a combined electrochemical and spectroscopic approach to follow the changes of the photoelectrocatalytic activity and of the electronic semiconductor properties of mesoporous TiO₂ films upon charge transfer reductive doping. Shallow donors (i.e. electron/proton pairs) were introduced into the semiconductor by the application of an external potential or, alternatively, by band gap excitation at open circuit conditions. In the latter case the effective open circuit doping potential depends critically on electrolyte composition (e.g. the presence of electron or hole acceptors).

SUBMITTER: Idigoras J 

PROVIDER: S-EPMC7116043 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature