A new method for obtaining thin films of doped molecular materials in a complete absence of oxygen is described. It consists in simultaneously subliming under vacuum the electroactive compound—a metallophthalocyanine—and the electron acceptor or electron donor doping agent. The extent of doping is controlled by the relative rates of sublimation. The ac and dc electrical properties of thin films are determined under high vacuum as to eliminate the influence of oxygen which has been previously shown to be of the utmost importance. Both p‐ and n‐type dopings have been achieved; the increase of conductivity reaches six orders of magnitude for p‐type doping with dichlorodicyanoquinone (DDQ). For the first time a rectifying contact between doped phthalocyanine thin films and aluminum has been observed in strict absence of oxygen.
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1 October 1986
Research Article|
October 01 1986
Molecular material‐based junctions: Formation of a Schottky contact with metallophthalocyanine thin films doped by the cosublimation method
M. Maitrot;
M. Maitrot
Université C. Bernard, Laboratoire d’Electronique II, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
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G. Guillaud;
G. Guillaud
Université C. Bernard, Laboratoire d’Electronique II, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
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B. Boudjema;
B. Boudjema
Université C. Bernard, Laboratoire d’Electronique II, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
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J. J. André;
J. J. André
Institut C. Sadron (ULP‐CNRS), 6 rue Boussingault, 67083 Strasbourg Cedex, France
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J. Simon
J. Simon
Ecole Supérieure de Physique et de Chimie, Industrielles de la Ville de Paris, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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J. Appl. Phys. 60, 2396–2400 (1986)
Article history
Received:
March 24 1986
Accepted:
June 13 1986
Citation
M. Maitrot, G. Guillaud, B. Boudjema, J. J. André, J. Simon; Molecular material‐based junctions: Formation of a Schottky contact with metallophthalocyanine thin films doped by the cosublimation method. J. Appl. Phys. 1 October 1986; 60 (7): 2396–2400. https://doi.org/10.1063/1.337151
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