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Calibration Factor for Determination of Interstitial Oxygen Concentration in Germanium by Infrared Absorption

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Abstract:

Intensities of infrared absorption due to asymmetric stretching vibrations of interstitial oxygen atoms in Ge crystals enriched with 16O and 18O isotopes have been compared with oxygen concentrations determined by means of secondary ion mass spectrometry (SIMS). For Ge samples with oxygen content less than 5⋅1017 cm-3 a good correlation has been found between the values of oxygen concentration and values of absorption coefficient in maximum of the absorption band at 855.6 cm-1 with a proportionality coefficient CO = 0.95.1017 сm-2. It is argued that kinetics of oxygen-related thermal double donor formation and oxygen loss upon heat-treatments of Ge crystals at 350 оС cannot be described properly with the application of calibration coefficient CO = 5.1016 cm-2, which is widely used for the determination of oxygen concentration in Ge crystals.

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Info:

Periodical:

Solid State Phenomena (Volumes 108-109)

Pages:

735-740

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.108-109.735

Citation:

Cite this paper

Online since:

December 2005

Authors:

Valentin V. Litvinov, Bengt Gunnar Svensson, L.I. Murin, J. Lennart Lindström, Vladimir P. Markevich

Keywords:

Germanium, Infrared Absorption, Oxygen, SIMS

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