Interface states and capacitance-voltage characteristics of n-SnO2 : Ni/p-Si heterostructures under gas-adsorption conditionsстатья
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Аннотация:The n-SnO2:Ni/p-Si heterostructures were synthesized with a mean size of 6-8 nm of crystallites in the tin dioxide layer. The capacitance-voltage characteristics of these structures were measured in dry air and under adsorption of NO2 and C2H5OH molecules. The variation of a reference-signal frequency within 0.5-20 kHz made it possible to separate out the contribution of heterointerface states to the structure capacitance. Adsorption of NO2 molecules was shown to reduce the density of the heterointerface states, while adsorption of ethanol molecules resulted in its increase. (C) 2001 MAIK "Nauka/Interperiodica".