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要旨:
The general case of a heterogeneous electron transfer reaction is realized by ultrafast electron transfer
from a photo-excited molecule to a wide continuum of electronic acceptor states. Two different theoretical
model calculations addressing the injection dynamics have recently been presented. The first scenario
predicts a wide energy distribution for the injected electron via excitations of high-energy
vibrational modes in the ionized molecule, whereas the second scenario ascribes the width to thermal
fluctuations. We present experimental data at different temperatures and identify the valid injection scenario
for perylene/TiO2 systems. The results are discussed in view of recent solar energy conversion
scenarios.
