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Effect of hydrogenation on the electrical and optical properties of GaSb

Dutta, PS and Bhat, HL and Kumar, V (1996) Effect of hydrogenation on the electrical and optical properties of GaSb. In: Symposium A – Ion-Solid Interactions for Materials Modification and Processing, 27 Nov.-1 Dec. 1995, Boston, MA, USA, pp. 533-538.

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Abstract

The effect of hydrogen plasma treatment on the optical and electrical properties of Gallium Antimonide bulk single crystals is presented. Plasma exposure gives rise to a layer of defects on the surface. These defects introduce multiple trap levels in the band gap from which a slow emission of carriers is observed during the capacitance-voltage measurements. On removal of the defect layer by controlled etching, the effects of hydrogen passivation are seen. The results of optical measurements indicate that passivation of shallow acceptors is more efficient than that of the donors and in general the passivation efficiency depends on the doping level. Passivation of deep levels and extended defects like grain boundaries and dislocations has also been observed. The thermal stability of the passivated deep level and extended defects is higher than that of the shallow level

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Materials Research Society
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 29 Aug 2007
Last Modified: 10 Jan 2012 05:12
URI: http://eprints.iisc.ernet.in/id/eprint/10764

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