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Proceedings Paper

Femtosecond photoemission study of excited state dynamics in organic photoreceptors
Author(s): Antti Johannes Maekinen; S. Schoemann; Yongli Gao; M. Gary Mason; A. A. Muenter; Andrew R. Melnyk
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Paper Abstract

The charge transfer (CT) process in organic semiconductor thin film structures is an important problem for applications such as photoreceptors and light-emitting devices. The operation of a photoreceptor structure is based on a CT process between a donor molecule and an acceptor transport molecule. We have investigated such a structure formed by vacuum-grown thin films of two organic molecules, N,N'-diphenethyl-3,4,9,10-perylenetetracarboxylic-diimide (DPEP) and N,N'-diphenyl-N,N'-(3-methylphenyl)-1,1'- biphenyl-4,4'-diamine (TPD), with femtosecond time-resolved photoemission spectroscopy. By measuring the lifetimes of the excited electron states in the mixtures of these molecules we are able to determine the time-scale for the electron transfer (ET) between the excited states of the TPD and DPEP molecules. We show that the biexponential ET dynamics consist of a short component of less than 100 fs and a long component of several hundreds fs in length.

Paper Details

Date Published: 28 March 2000
PDF: 7 pages
Proc. SPIE 3940, Ultrafast Phenomena in Semiconductors IV, (28 March 2000); doi: 10.1117/12.381475
Show Author Affiliations
Antti Johannes Maekinen, Univ. of Rochester (United States)
S. Schoemann, Univ. of Rochester (United States)
Yongli Gao, Univ. of Rochester (United States)
M. Gary Mason, Eastman Kodak Co. (United States)
A. A. Muenter, Eastman Kodak Co. (United States)
Andrew R. Melnyk, Xerox Corp. (United States)


Published in SPIE Proceedings Vol. 3940:
Ultrafast Phenomena in Semiconductors IV
Kong-Thon F. Tsen; Jin-Joo Song, Editor(s)

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