Amorphous silicon dispersive transport considerations for analysis of films and solar cells

It has been reported that as the deposition temperature is decreased, the hydrogen content increases, the microvoid fraction increases and the electron mobility decreases. Based on dispersive transport considerations, it is not expected that the electron mobility plays a major role in determining μ...

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Bibliographic Details
Published in:Journal of non-crystalline solids 1993-12, Vol.164, p.509-512
Main Authors: Fortmann, C.M., Dawson, R.M.A., Gunes, M., Wronski, C.R.
Format: Article
Language:English
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Summary:It has been reported that as the deposition temperature is decreased, the hydrogen content increases, the microvoid fraction increases and the electron mobility decreases. Based on dispersive transport considerations, it is not expected that the electron mobility plays a major role in determining μ e τ e or affects the performance of solar cells in the annealed state. However, if a thermodynamic equilibrium exists between charge carriers and dangling bond defects, lower mobilities will have a detrimental affect on stability due to increases in carrier density. Furthermore, the distributions of charged dangling bonds are affected by the disparity between electron and hole mobilities which, under illumination, will result in asymmetrical distributions of charged, light induced defects.
ISSN:0022-3093
1873-4812
DOI:10.1016/0022-3093(93)90601-S