The influence of surface treatment on the electronic structure of CVD diamond films

The electronic structure of CVD diamond surfaces has been studied by core level and valence band photoelectron spectroscopy. Upon annealing at 870 °C, a band of surface states appears within the top 6 eV of the valence bands which is accompanied by a decrease in spectral intensity around 9 eV and a...

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Bibliographic Details
Published in:Diamond and related materials 1994-04, Vol.3 (4), p.891-895
Main Authors: Graupner, R., Stöckel, R., Janischowski, K., Ristein, J., Hundhausen, M., Ley, L.
Format: Article
Language:English
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Summary:The electronic structure of CVD diamond surfaces has been studied by core level and valence band photoelectron spectroscopy. Upon annealing at 870 °C, a band of surface states appears within the top 6 eV of the valence bands which is accompanied by a decrease in spectral intensity around 9 eV and a band bending of 0.4 eV. Similar changes could be induced by Ar ion bombardment. Exposure to atomic hydrogen largely restored the original spectra. These observations are compared with corresponding data on single-crystalline diamond surfaces. Similarities and differences are discussed in terms of structural models of the CVD diamond surface.
ISSN:0925-9635
1879-0062
DOI:10.1016/0925-9635(94)90294-1