Microscopic and macroscopic investigation of electrical contacts to n-ZnSe

DHARMADASA, I. M., BLOMFIELD, C. J., GREGORY, G. E., CAVENETT, B. C., PRIOR, K. A. and SIMPSON, J. (1994). Microscopic and macroscopic investigation of electrical contacts to n-ZnSe. Surface and Interface Analysis, 21 (10), 718-723.

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Link to published version:: 10.1002/sia.740211007

Abstract

The formation of Schottky barriers at the Sb/n-ZnSe interface has been investigated for a selected number of chemically etched n-ZnSe surfaces. Microscopic properties of the surfaces and interfaces have been observed with SEM, XPS, AES and SIMS, while the conventional I-V technique has been used to determine the macroscopic electrical properties. Both polycrystalline ZnSe wafers and molecular beam epitaxy-grown layers of n-ZnSe on n(+)-GaAs substrates were used for this investigation. Stoichiometric variations resulting from wet chemical etching of n-ZnSe were investigated using XPS, AES and SIMS techniques. The electrical properties of Sb contacts formed by vacuum evaporation on the etched surfaces were also determined. Possible intermixing at the Sb/n-ZnSe interface was studied using the SIMS imaging technique. The correlation between macroscopic electrical properties and microscopic interactions at the interface will be presented in this paper.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number: 10.1002/sia.740211007
Depositing User: Ann Betterton
Date Deposited: 08 Mar 2010 16:57
Last Modified: 08 Mar 2010 16:57
URI: http://shura.shu.ac.uk/id/eprint/1258

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