Rectification was observed on polycrystalline samples of metal‐free, copper, nickel, and molybdenum phthalocyanines when these materials were sandwiched between different metal electrodes. The presence of a small amount of a liquid polar impurity proved essential for rectification, and it is suggested that the observed rectification is caused by the formation of an ionic space‐charge barrier in the vicinity of the least noble electrode. The highest rectification ratio observed was 500 and was obtained with copper phthalocyanine between a platinum and a silver electrode and also between a silver and an aluminum electrode. The effects of temperature, electrode material, and electrode size on the rectification ratio are given.
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D. Kleitman, “Electrical Properties of Phthalocyanine,” U.S. Technical Services Kept. P. S. 111419, p. 55.
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© 1963 American Institute of Physics.
1963
American Institute of Physics
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