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- W2057872720 abstract "Abstract A new method is described to calculate the rate constant for charge transfer (CT) from an excited dye to a molecular crystal by taking into account competing energy transfer to a metal electrode. For the system oxacarbocyanine dye/p-chloranil single crystal in a sandwich arrangement with additional arachidic acid monolayers and evaporated aluminium electrodes, based on photocurrent and fluorescence measurements k CT - (1.5 ± 0.7) 10 9 sec -1 has been calculated. This overall rate constant is discussed in terms of a detailed but simple reaction scheme for charge carrier injection. It turned out to be equal to the dissociation rate constant of the excited dye times the quantum efficiency Φ CT for dissociation of an intermediate “charge transfer” state. Dissociation occurs from a vibrationally relaxed excited state of the dye. Finally, comparison is made with a straightforward calculation using the well-known unipolar current density. Nearly quantitative agreement of estimations emphasizes the use of the mono-layer technique to build dry electrochemical cells in order to study the principles of photo-electrochemical reactions." @default.
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- W2057872720 date "1979-06-01" @default.
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- W2057872720 title "Energy Transfer in Competition to Charge Transfer as a Method to Determine the Rate Constant for Charge Carrier Injection in the Sandwich System: Cyanine Dye Monolayer/p-Chloranil Crystal" @default.
- W2057872720 doi "https://doi.org/10.1515/zna-1979-0611" @default.
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