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High Electrical Conductivity in Organic Single-Component Systems Based on 2,5-Dimethylthio-TCNQ

Published online by Cambridge University Press:  16 February 2011

J. S. Zambounis,
J. Mizuguchi,
H. Hediger,
J. Pfeiffer,
B. Schmidhalter,
G. Rihs,
O. Chauvet and
L. Zuppiroli
J. S. Zambounis
Affiliation:
Corporate Materials Research, Ciba-Geigy AG, 1723 Marly 1, Switzerland
J. Mizuguchi
Affiliation:
Corporate Materials Research, Ciba-Geigy AG, 1723 Marly 1, Switzerland
H. Hediger
Affiliation:
Corporate Materials Research, Ciba-Geigy AG, 1723 Marly 1, Switzerland
J. Pfeiffer
Affiliation:
Corporate Materials Research, Ciba-Geigy AG, 1723 Marly 1, Switzerland
B. Schmidhalter
Affiliation:
Corporate Materials Research, Ciba-Geigy AG, 1723 Marly 1, Switzerland
G. Rihs
Affiliation:
Corporate Materials Research, Ciba-Geigy AG, 1723 Marly 1, Switzerland
O. Chauvet
Affiliation:
Laboratoire de Physique des Solides Semi-cristallins, Département de Physique, Ecole Polytechnique Fédérale, CH-1015 Lausanne, Switzerland
L. Zuppiroli
Affiliation:
Laboratoire de Physique des Solides Semi-cristallins, Département de Physique, Ecole Polytechnique Fédérale, CH-1015 Lausanne, Switzerland
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Abstract

2,5-dimethylthio-TCNQ has been newly synthesized, and its optical and electrical properties have been investigated in evaporated films. A high electrical conductivity of σ=2× 10−5 Scm−l has been measured at room temperature. The present single-component system is found to contain 2×1017 spins/cm3. The charge carriers are presumably due to incorporated impurities which give the ESR signals. Carrier hopping is considerably facilitated by close intermolecular S-N contacts between the S atom of the -SCH3 group of one molecule and the N atom of -C≡N group of the neighboring Molecule.

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References

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