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Temperature Dependence of the Picosecond Photocurrent in Stretched Trans-Polyacetylene Films with Below Gap Excitation

Published online by Cambridge University Press:  25 February 2011

A. D. Walser ,
R. Dorsinville ,
R. Tubino  and
R. R. Alfano
A. D. Walser
Affiliation:
Institute for Ultrafast Spectroscopy and Lasers Electrical Engineering Department The City College of New York, 138th St. and Convent Ave. N.Y., N.Y. 10031
R. Dorsinville
Affiliation:
Institute for Ultrafast Spectroscopy and Lasers Electrical Engineering Department The City College of New York, 138th St. and Convent Ave. N.Y., N.Y. 10031
R. Tubino
Affiliation:
Istituto di Fisica dell‘Universita’, Via Vienna 2, Sassari and Istituto di Chimica delle Macromolecole, CNR, Italy
R. R. Alfano
Affiliation:
Institute for Ultrafast Spectroscopy and Lasers Electrical Engineering Department The City College of New York, 138th St. and Convent Ave. N.Y., N.Y. 10031
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Abstract

The temperature dependence of the picosecond photocurrent with below gap excitation (1.06 μm) has been measured for a highly oriented form of trans-polyacetylene. The 1-d picosecond photocurrent is independent of temperature. The 3-d picosecond photo-current is temperature dependent with an activation energy of 63 meV. These results demonstrate the photoproduction of nonlinear charged carriers ( solitons and polarons) at energies that are below the principal interband absorption edge.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 173: Symposium Q – Advanced Organic Solid State Materials , 1989 , 437
Copyright
Copyright © Materials Research Society 1990

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References

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