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Proceedings Paper

Optical probes of photoexcitations in fullerene thin films from femtoseconds to milliseconds
Author(s): Z. Valy Vardeny; Xing Wei; D. Dick
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Paper Abstract

We have studied photoexcitations in various fullerene thin films using transient photomodulation and photoluminescence from 100 fs to 50 ms and absorption-detected magnetic resonance (ADMR). We show that singlet Frenkel type excitons are the primary photoexcitations; their recombination kinetics in the picosecond time domain are dispersive as a result of inhomogeneity. The long-lived photoexcitations, however, are shown to be triplet excitons and charged polarons, identified by the correlation found between their associated optical transitions and ADMR signals with spin 1 and 1/2, respectively.

Paper Details

Date Published: 8 December 1995
PDF: 9 pages
Proc. SPIE 2530, Fullerenes and Photonics II, (8 December 1995); doi: 10.1117/12.228107
Show Author Affiliations
Z. Valy Vardeny, Univ. of Utah (United States)
Xing Wei, Los Alamos National Lab. (United States)
D. Dick, Univ. of California/Santa Barbara (United States)


Published in SPIE Proceedings Vol. 2530:
Fullerenes and Photonics II
Zakya H. Kafafi, Editor(s)

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