Defect distributions in a-Si(x)Ge(1-x): H

Carius R, Stiebig H, Siebke F, Fölsch J (1998)
Journal of Non-Cryst. Solids 227-230: 432-436.

Zeitschriftenaufsatz | Veröffentlicht| Englisch
 
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Autor/in
Carius, R.; Stiebig, HelmutUniBi; Siebke, F.; Fölsch, J.
Abstract / Bemerkung
Gap states in a-SiGe:H alloys were examined by numerical simulations of sub-bandgap absorption spectra measured by the constant photocurrent method and photothermal deflection spectroscopy. In contrast to simple deconvolution methods our analysis uses occupation statistics and takes into account the condition of charge neutrality. The simulations yield information on the energy distribution and the charge state of the defects. The results reveal the coexistence of charged and neutral defects. The defect distributions are similar to those found in amorphous hydrogenated silicon. In the investigated range of compositions charged states dominate the defect density. Taking the position of the defect states as a reference level both band edges shift towards the defect states with decreasing band gap. In contrast to electron spin resonance measurements, no evidence for a distinction between Si-related and Ge-related defect states can be found in sub-bandgap absorption spectra. (C) 1998 Elsevier Science B.V. All rights reserved.
Stichworte
defects; density of states; alloys; silicon; germanium; modelling
Erscheinungsjahr
1998
Zeitschriftentitel
Journal of Non-Cryst. Solids
Band
227-230
Seite(n)
432-436
ISSN
0022-3093
Page URI
https://pub.uni-bielefeld.de/record/2351915

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Carius R, Stiebig H, Siebke F, Fölsch J. Defect distributions in a-Si(x)Ge(1-x): H. Journal of Non-Cryst. Solids. 1998;227-230:432-436.
Carius, R., Stiebig, H., Siebke, F., & Fölsch, J. (1998). Defect distributions in a-Si(x)Ge(1-x): H. Journal of Non-Cryst. Solids, 227-230, 432-436. doi:10.1016/S0022-3093(98)00088-X
Carius, R., Stiebig, H., Siebke, F., and Fölsch, J. (1998). Defect distributions in a-Si(x)Ge(1-x): H. Journal of Non-Cryst. Solids 227-230, 432-436.
Carius, R., et al., 1998. Defect distributions in a-Si(x)Ge(1-x): H. Journal of Non-Cryst. Solids, 227-230, p 432-436.
R. Carius, et al., “Defect distributions in a-Si(x)Ge(1-x): H”, Journal of Non-Cryst. Solids, vol. 227-230, 1998, pp. 432-436.
Carius, R., Stiebig, H., Siebke, F., Fölsch, J.: Defect distributions in a-Si(x)Ge(1-x): H. Journal of Non-Cryst. Solids. 227-230, 432-436 (1998).
Carius, R., Stiebig, Helmut, Siebke, F., and Fölsch, J. “Defect distributions in a-Si(x)Ge(1-x): H”. Journal of Non-Cryst. Solids 227-230 (1998): 432-436.