Article ID Journal Published Year Pages File Type
9572523 Applied Surface Science 2005 7 Pages PDF
Abstract
The thermal deoxidation procedure of GaSb(100) substrates has been investigated with in-situ reflectance difference spectroscopy (RDS). The “epi-ready” substrates were loaded in a metal-organic vapor phase epitaxy (MOVPE) reactor either “as-supplied” or after etching with HCl to remove the native oxide layer. Annealing between 475-575  °C and in-situ monitoring reveals RDS features associated with the surface morphology and the development of oxide desorption. This process is supported by molecular hydrogen utilized as carrier gas. Photoemission spectroscopy was applied to benchmark the surface of selected samples with regard to the electronic structure and the chemical composition during the deoxidation of GaSb(100) substrates. Based on the in-situ and UHV data, a model of the oxide desorption process and recommendations for the GaSb substrate deoxidation procedure in MOVPE environment are proposed.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
Authors
, , , , , , ,