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Polarons and Triplet Excitons in C60: An Optically Detected Magnetic Resonance (Odmr) and Light-Induced Esr (Lesr) Study

Published online by Cambridge University Press:  25 February 2011

P. A. Lane ,
L. S. Swanson ,
Q.-X. Ni ,
J. Shinar ,
J Engel ,
T. J. Barton ,
J. Wheelock  and
L. Jones
P. A. Lane
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011
L. S. Swanson
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011
Q.-X. Ni
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011
J. Shinar
Affiliation:
Ames Laboratory - USDOE and Physics Department, Iowa State University, Ames, IA 50011
J Engel
Affiliation:
Ames Laboratory - USDOE and Chemistry Department, Iowa State University, Ames, IA 50011
T. J. Barton
Affiliation:
Ames Laboratory - USDOE and Chemistry Department, Iowa State University, Ames, IA 50011
J. Wheelock
Affiliation:
Ames Laboratory - USDOE, Iowa State University, Ames, IA 50011
L. Jones
Affiliation:
Ames Laboratory - USDOE, Iowa State University, Ames, IA 50011
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Abstract

The photoluminescence (PL), X-band ODMR. and LESR of C60 films and C60 isolated in a toluene/polystyrene glass matrix (C60:T/PS) is described. The delocalized triplet LESR and ODMR of C60:T/PS are similar to previously reported LESR. In films, however, the ODMR indicates that the delocalized triplet is larger and distorted by neighboring molecules. In addition, another, localized triplet, and a narrow PL-enhancing line at g = 2.0017 ± 0.0005 are observed. These features are similar to those observed in several π-conjugated polymers. The former is attributed to a localized triplet of size similar to a 5- or 6-membered ring, tentatively on a face adjacent to another C60 molecule; the latter is believed to result from intermolecular polaron recombination.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 270: Symposium M – Novel Forms of Carbon , 1992 , 305
Copyright
Copyright © Materials Research Society 1992

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References

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