The widely accepted expression for conductance in polycrystalline metal oxides cannot take into account of the observed decrease in conductance of nanostructured materials with respect to their larger counterpart. We provide here an explanation for this phenomenon suggesting that tunneling through the Schottky barrier has a comparable importance to thermionic crossing in ruling the electron transport in these materials.
Unpinning of the Fermi level and tunneling in metal oxide semiconductors
MALAGU', Cesare;MARTINELLI, Giuliano;
2008
Abstract
The widely accepted expression for conductance in polycrystalline metal oxides cannot take into account of the observed decrease in conductance of nanostructured materials with respect to their larger counterpart. We provide here an explanation for this phenomenon suggesting that tunneling through the Schottky barrier has a comparable importance to thermionic crossing in ruling the electron transport in these materials.File in questo prodotto:
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