Optical probes of photoexcitations in fullerene thin films from femtoseconds to milliseconds

Z. Valy Vardeny; Xing Wei; D. Dick

doi:10.1117/12.228107

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8 December 1995 Optical probes of photoexcitations in fullerene thin films from femtoseconds to milliseconds

Z. Valy Vardeny, Xing Wei, D. Dick

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Proceedings Volume 2530, Fullerenes and Photonics II; (1995) https://doi.org/10.1117/12.228107
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

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Z. Valy Vardeny, Xing Wei, and D. Dick "Optical probes of photoexcitations in fullerene thin films from femtoseconds to milliseconds", Proc. SPIE 2530, Fullerenes and Photonics II, (8 December 1995); https://doi.org/10.1117/12.228107

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