Deposition of highly efficient microcrystalline silicon solar cells under conditions of low H<sub>2</sub> dilution: the role of the transient depletion induced incubation layer

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公開日
2007-01-09
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  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/pip.743
公開者
Wiley

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<jats:title>Abstract</jats:title><jats:p>This paper addresses the plasma deposition of highly efficient microcrystalline silicon (μc‐Si:H) p‐i‐n solar cells under conditions of high SiH<jats:sub>4</jats:sub> utilization and low H<jats:sub>2</jats:sub> dilution. It was established that the transient depletion of the initially present SiH<jats:sub>4</jats:sub> source gas induces the formation of an amorphous incubation layer that prevents successful crystallite nucleation in the i‐layer and leads to poor solar cell performance. The effect of this transient depletion induced incubation layer on solar cells was made visible through dedicated solar cell deposition series and selected area electron diffraction measurements. Applying a gas flow procedure at plasma ignition it was succeeded to prepare state‐of‐the‐art μc‐Si:H material and solar cells under low hydrogen dilution conditions, highlighted by μc‐Si:H solar cells of up to 9·5% efficiency prepared using an undiluted source gas flow consisting solely of SiH<jats:sub>4</jats:sub>. Copyright © 2007 John Wiley & Sons, Ltd.</jats:p>

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