Size-dependent electrical behavior of spatially inhomogeneous barrier height regions on silicon

Robert C. Rossi, Ming X. Tan, Nathan S Lewis

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57 Citations (Scopus)


A series of ordered, periodic arrays of low barrier height n-Si/Ni nanometer-scale contacts interspersed among high barrier height n-Si/liquid contacts were prepared by evaporating Ni through bilayers of close-packed latex spheres deposited on n-Si. By varying the diameter of the spheres from 174 to 1530 nm, geometrically self-similar Si/Ni structures were produced having triangular Si/Ni features ranging from approximately 100 to 800 nm on a side. The resulting Si surfaces were used as electrodes in methanolic electrochemical cells containing LiClO4 and 1,1′-dimethylferrocene+/o. The dark current density-voltage properties of the resulting mixed barrier height contacts were strongly dependent on the size of the low barrier height contact regions even though the fraction of the Si surface covered by Ni remained constant.

Original languageEnglish
Pages (from-to)2698-2700
Number of pages3
JournalApplied Physics Letters
Issue number17
Publication statusPublished - Oct 23 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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