Organic heterojunctions comprising of n-type fluorinated copper-phthalocyanine (F 16CuPc) and p-type cobalt-phthalocyanine (CoPc) layers were prepared on (001) LaAlO 3 substrates. In the entire temperature range of 300-30 K, F 16CuPc/CoPc heterojunctions showed an ohmic conduction with three order of magnitude lower resistivity than the individual layers. This indicates formation of a charge accumulation layer at the interface. Kelvin probe studies showed that charge accumulation layer is ∼10 nm thick on both the sides of the interface. © 2012 American Institute of Physics.

Shiv Govind Singh

Department of Electrical Engineering

A.K. Debnath

A. Kumar

S. Samanta

R. Prasad

A. Singh

A.K. Chauhan

P. Veerender

S. Basu

D.K. Aswal

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Applied Physics Letters

Fluorinated copper-phthalocyanine/cobalt-phthalocyaine organic heterojunctions: Charge transport and Kelvin probe studies

Journal	Applied Physics Letters
ISSN	00036951