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Dynamics of Photoexcited Carriers in Poly(P-Phenylenevinylene) and Its Soluble Derivative

Cited 12 time in Web of Science Cited 11 time in Scopus
Authors
Lee, Changhee; Yu, G.; Moses, D.; Heeger, A. J.
Issue Date
1995
Publisher
Elsevier
Citation
Synth. Met. 69 (1995) 429
Abstract
The dynamics of photoexcited carriers in poly(p-phenylene vinylene) (PPV) and its soluble derivative, poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) are studied using the measurement of subnanosecond transient photoconductivity (PC). An initial transient photocurrent decays in the subnanosecond time regime, followed by a thermally-activated slow tail. The magnitude of the peak transient PC is almost temperature independent and proportional to the light intensity and electric field. The results are interpreted as a free carrier generation via a π-π* interband transition. The transient PC in MEH-PPV is an order of magnitude smaller than that in PPV, indicating that the decrease of the interchain coupling due to the bulky side-chains results in a smaller quantum efficiency for carrier generation.
ISSN
0379-6779
Language
English
URI
http://hdl.handle.net/10371/13731
DOI
https://doi.org/10.1016/0379-6779(94)02515-Z
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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