Transient Spectroscopy of Excitons and Polarons in C60 Films from Femtoseconds to Milliseconds

D. Dick, X. Wei, S. Jeglinski, R. E. Benner, Z. V. Vardeny, D. Moses, V. I. Srdanov, and F. Wudl
Phys. Rev. Lett. 73, 2760 – Published 14 November 1994
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Abstract

We have studied photoexcitations in C60 films using transient photomodulation and photoluminescence from 100 fs to 50 ms and absorption-detected magnetic resonance (ADMR). We show that singlet Frenkel 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 (C60±), identified by the correlation found between their associated optical transitions and ADMR signals with spin 1 and ½, respectively.

  • Received 27 August 1993

DOI:https://doi.org/10.1103/PhysRevLett.73.2760

©1994 American Physical Society

Authors & Affiliations

D. Dick, X. Wei, S. Jeglinski, R. E. Benner, and Z. V. Vardeny

  • Departments of Physics and Electrical Engineering, University of Utah, Salt Lake City, Utah 84112

D. Moses, V. I. Srdanov, and F. Wudl

  • Institute of Polymers and Organic Solids, University of California, Santa Barbara, California 93106

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Vol. 73, Iss. 20 — 14 November 1994

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