The injection time τ of the electron transfer from an excited electronic state of a dye molecule to a semiconducting surface is studied. An analytical expression for the injection time as a function of excitation energy is derived. The semiconductor is described as a one-dimensional chain in the tight-binding approximation, and the dye molecule is included via the coupling to the semiconductor. For a TiO2 semiconductor, the injection time is estimated to be approximately 5 fs. The results support and characterize recent experimental studies.
|Number of pages||5|
|Journal||Journal of Physical Chemistry B|
|Publication status||Published - Sep 7 2000|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry