Bridge mediated ultrafast heterogeneous electron transfer

Bridge mediated photoinduced ultrafast heterogeneous electron transfer (ET) from a molecularly anchored chromophore to a semiconductor surface is modelled theoretically. The continuum levels of the semiconductor substrate are taken into account in the numerical calculations via a polynomial expansio...

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Bibliographic Details
Published inChemical physics letters Vol. 351; no. 3; pp. 242 - 250
Main Authors Ramakrishna, S., Willig, F., May, V.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 2002
Elsevier Science
Subjects
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Other topics in molecular properties and interactions with photons
Physics
Semiconductor materials
Hamiltonians
Adsorbed state
Electron state
Theoretical study
Electron transfer
Photoinduced effect
Vibronic interaction
Chromophores
Molecule surface interaction
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Summary:Bridge mediated photoinduced ultrafast heterogeneous electron transfer (ET) from a molecularly anchored chromophore to a semiconductor surface is modelled theoretically. The continuum levels of the semiconductor substrate are taken into account in the numerical calculations via a polynomial expansion. Electron transfer for the direct injection case in the strong coupling limit is studied and compared with cases where intermediate bridging states are successively introduced to weaken the effective electronic coupling. The role of vibronic coherences in the strong electronic coupling limit as well as in off-resonant bridge mediated electron transfer is also discussed.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(01)01376-8