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Proceedings Paper

Time-resolved Foerster energy transfer in molecular and polymeric guest-host systems
Author(s): Arthur Dogariu; Rahul Gupta; Alan J. Heeger; Hailiang Wang; Hideyuki Murata; Zakya H. Kafafi
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Paper Abstract

Sub-picosecond spectroscopy and ultrafast pump-probe experiments spectrally and temporally resolve the Forster energy transfer in blends from larger gap host to the smaller gap guest organic materials. The dynamics of the stimulated emission and photoinduced absorption of the polymer blends indicate that 10 - 20 ps are required for complete energy transfer. The Forster interaction ranges suggested by quantitative measurements of energy transfer rates are compared with the theoretical values as calculated from the spectral overlap. We discuss the effect of the excited state delocalization. The energy transfer dynamics in small organic molecule blends have a longer time scale (1 ns), corresponding to the much longer lifetimes of the organic dyes.

Paper Details

Date Published: 17 December 1999
PDF: 9 pages
Proc. SPIE 3797, Organic Light-Emitting Materials and Devices III, (17 December 1999); doi: 10.1117/12.372724
Show Author Affiliations
Arthur Dogariu, Univ. of California/Santa Barbara (United States)
Rahul Gupta, Univ. of California/Santa Barbara (United States)
Alan J. Heeger, Univ. of California/Santa Barbara and UNIAX Corp. (United States)
Hailiang Wang, UNIAX Corp. (United States)
Hideyuki Murata, Naval Research Lab. (United States)
Zakya H. Kafafi, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 3797:
Organic Light-Emitting Materials and Devices III
Zakya H. Kafafi, Editor(s)

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