Journal
THIN SOLID FILMS
Volume 515, Issue 19, Pages 7486-7489Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2006.11.091
Keywords
electrical properties; mobility; microcrystalline silicon; thin-film silicon
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For a better understanding of electronic transport mechanisms in thin-film silicon solar cell quality films, we have investigated the Hall mobility for electrons in microcrystalline/amorphous silicon over a range of crystallinities and doping concentrations. We find that Hall mobility increases with increasing doping concentration in accordance with earlier measurements. With increasing amorphous fraction, the measured mobility decreases suggesting a negative influence of the additional disorder. The results suggest a differential mobility model in which mobility depends on the energy level of the carriers that contribute to the electrical current. (C) 2006 Elsevier B.V. All rights reserved.
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