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Journal №2 for 2010 г.
Article in number:
PLANAR NANO-STRUCTURES FORMATION FEATURES ON MOLECULAR-DOPED VANADYL PHTHALOCYANINE
Keywords:
heterogeneous nano-structure
vanadyl phthalocyanine
effective thickness
conductance
alloying substance
molecular additive
electron acceptor
dopant
charge carriers
sensitivity to electron
Authors:
E. S. LEONOV, P.А. LUTCHNIKOV, G.L. PAKHOMOV, V.V. ТRAVKIN
Abstract:
The formation process of thin-film heterogeneous nano-structures on the base of two-layered nano-dimensional vanadyl phthalocyanine PcVO systems and the layer of its molecular alloying substances of benzol series nitroderivative is examined.
The variation of kinetics and stationary electrical conduction of vanadyl phthalocyanine PcVO in the two-layer system with effective alloying substance layer thickness ranged from 2 to 150 nm is established. DP layer cladding with thickness of dozens of nm results in considerable conductance increase of heterogeneous PcVO film, which has a steady-state value when effective DP thickness is about 85 - 100 nm. Doping with benzol-series(range) nitroderivatives yields the increase of PcVO film conductance. Under such conditions DP works as an electron acceptor and this fact brings to improvement of conductance in the doped OPP because of the increase in concentration of holes which are the main charge carriers in PcVO. It was observed that increase of the conductance σ for the obtained heterogeneous structures in the row TNB - TNF - TNT is accompanied by marked decrease of the charge carriers activation energy in the heterogeneous structure. A detected correlation of the final heterogeneous nano-structures properties with sensitivity to molecular additive electron indicates the donor-acceptor mechanism of PcVO - benzol nitroderivatives dopant interaction. From kinetics of the value of σ(t) in the double-layer trinitrotoluene - and 2,4,6 - trinitrophenol - doped PcVO - DP structure the coefficients of dopand D diffusion were determined
Pages: 34-40
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