Journal
CHEMICAL PHYSICS LETTERS
Volume 466, Issue 1-3, Pages 65-67Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2008.10.027
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Hybrid interfaces in semiconductor heterostructures consisting of C-60/GaAs bilayers have been investigated by means of ultrafast pump-probe spectroscopy. From previous results, the energy levels alignment at the interface shows no injection barrier for electrons from GaAs to C-60. Measurements have been carried out in order to monitor photoinduced electron transfer across the interface. Upon selective excitation of the GaAs layer we observe photobleaching (PB) of C-60 due to a decrease of C-60 neutral molecules. We monitor the PB dynamics concluding that electron transfer proceeds in about 4 ps and then relaxes back to ground state in timescales beyond 100 ps. (C) 2008 Elsevier B.V. All rights reserved.
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