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Proceedings Paper

Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers
Author(s): Jiandong D. Huang; Sergey V. Frolov; Z. Valy Vardeny; W. Chen; Thomas J. Barton; R. Sugimoto; Masanori Ozaki; Katsumi Yoshino
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Paper Abstract

We have employed the time-resolved photomodulation (PM) technique to study the photoexcitation dynamics of a luminescent (Si-PT) and nonluminescent (s-(CH)x) conducting polymers in the low signal limit. In each polymer, we identify two exponential decay processes in the PM decay, with characteristic time constants T1 and T2, where T1 is of order 1 ps and T2 depends on the specific polymer; T2 in Si-PT is about 50 ps, whereas T2 in s-(CH)x is about 5 ps. The difference in T2 is tentatively attributed to radiative and non-radiative recombination kinetics, respectively. We also found that the PM decay does not show any obvious temperature and intensity dependences, whereas the polarization memory decay is longer at low temperatures.

Paper Details

Date Published: 1 December 1997
PDF: 12 pages
Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); doi: 10.1117/12.284153
Show Author Affiliations
Jiandong D. Huang, Univ. of Utah (United States)
Sergey V. Frolov, Univ. of Utah (United States)
Z. Valy Vardeny, Univ. of Utah (United States)
W. Chen, Iowa State Univ. (United States)
Thomas J. Barton, Iowa State Univ. (United States)
R. Sugimoto, Osaka Univ. (Japan)
Masanori Ozaki, Osaka Univ. (Japan)
Katsumi Yoshino, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 3145:
Optical Probes of Conjugated Polymers
Z. Valy Vardeny; Lewis J. Rothberg, Editor(s)

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