Drift-mobility characterization of silicon thin-film solar cells using photocapacitance

J. K. Lee, A. M. Hamza, S. Dinca, Q. Long, Eric Allan Schiff, Q. Wang, B. Yan, J. Yang, S. Guha

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have applied the photocapacitance method to the measurements of hole drift-mobilities in silicon solar cells. We found a simple analysis that yields drift-mobilities even in the presence of anomalously dispersive transport. On one thick sample we measured the hole drift-mobility using both the photocapacitance and the time-of-flight methods; the two methods gave results that were consistent with each other and with the established bandtail multiple-trapping model. We then applied the method to thinner samples that are more characteristic of the conditions in solar modules, but are not generally usable for the time-of-flight method. These samples showed much smaller hole drift-mobilities than expected from the bandtail trapping model. We speculate that the hole drift-mobility has smaller values in regions close to the substrate during deposition than has been reported for thicker samples.

Original languageEnglish (US)
Pages (from-to)2194-2197
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume358
Issue number17
DOIs
StatePublished - Sep 1 2012

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Silicon solar cells
solar cells
silicon
thin films
trapping
Substrates
modules
Thin film solar cells

Keywords

  • Drift-mobility
  • Photocapacitance
  • Silicon solar cells

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Drift-mobility characterization of silicon thin-film solar cells using photocapacitance. / Lee, J. K.; Hamza, A. M.; Dinca, S.; Long, Q.; Schiff, Eric Allan; Wang, Q.; Yan, B.; Yang, J.; Guha, S.

In: Journal of Non-Crystalline Solids, Vol. 358, No. 17, 01.09.2012, p. 2194-2197.

Research output: Contribution to journalArticle

Lee, J. K. ; Hamza, A. M. ; Dinca, S. ; Long, Q. ; Schiff, Eric Allan ; Wang, Q. ; Yan, B. ; Yang, J. ; Guha, S. / Drift-mobility characterization of silicon thin-film solar cells using photocapacitance. In: Journal of Non-Crystalline Solids. 2012 ; Vol. 358, No. 17. pp. 2194-2197.
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