DLTS and PTIS of new donors in oxygen-doped germanium |
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Authors: | P Clauws J Broeckx E Simoen J Vernik |
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Institution: | Laboratorium voor Kristallografie en Studie van de Vaste Stof, Rijksuniversiteit Gent, Krijgslaan 281, B9000 Gent, Belgium |
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Abstract: | Two new DLTS bands I and II have been observed in n-type germanium containing 1016 cm-3 interstitial oxygen. The signature of II is: Ec?EII = 0.031 eV, K = 4 × 107 cm?2s?1; level I is about half as deep. In addision, the excitation spectrum of I is recorded by PTIS. It is composed of three hydrogenic donor series Ia, b, c with activation energies 17.25, 17.6 and 18.1 meV. The donors I and II are thought to correspond with the well known thermal oxygen donors. Energies for the latter were determined at 0.017 and 0.04 eV from Hall effect by Fuller and Doleiden. The possibility of double donors is examined, in analogy with the case of oxygen donors in silicon. |
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