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Investigation of Surface Potential Occurring at Metal/Phthalocyanine Interfaces by Electro-Absorption Technique
Takaaki MANAKA Xiao Man CHENG Cheng Quan LI Mitsumasa IWAMOTO
IEICE TRANSACTIONS on Electronics
Publication Date: 2002/06/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Recent Progress in Organic Molecular Electronics)
Category: Fabrication and Characterization of Thin Films
surface potential, phthalocyanine, electro-absorption,
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The surface potential built across vacuum deposited phthalocyanine (Pc) films on aluminum electrode was investigated by means of electro-modulation spectroscopy. The sandwich-type cells with thin air gap, which becomes a good insulator were used in order to avoid the influence of charge injection. The existence of the surface potential at the metal/organic-material interface induced 1f referenced electro-reflectance (ER) signals. As a result, the surface potential built across vacuum deposited Pc films on aluminum electrode was estimated to be 1.25 V.