Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 94, Issue 12, Pages 2205-2211Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2010.07.013
Keywords
Spin on dopants (SOD); Crystalline silicon; Solar cell; Photovoltaics; Low cost process
Funding
- NASA
- NSF
- University of Virginia Energy Initiative
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A simplified process for photovoltaic device fabrication is explored. The simplified process incorporates a single step wherein a thin film of phosphorus doped spin on dopant (SOD) serves as dopant source, anti-reflection coating (ARC) and a surface passivation layer. Detailed fabrication and photovoltaic device characterization results are presented. Device results for solar cells fabricated on low minority carrier lifetime Cz-substrates and high minority carrier lifetime Fz (polished and chemically textured substrates) are presented. Using this simplified process, photovoltaic devices with conversion efficiency of over 15% on c-Si wafers have been demonstrated. Further improvements in efficiency are possible by reduction in series resistance, control of surface dopant concentration and a rear passivated electrode configuration. (C) 2010 Elsevier B.V. All rights reserved.
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