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Modeling of photoluminescence spectra and quasi-Fermi level splitting in μc-Si:H solar cells

Authors
Journal
Solar Energy Materials and Solar Cells
0927-0248
Publisher
Elsevier
Publication Date
Volume
94
Issue
11
Identifiers
DOI: 10.1016/j.solmat.2010.06.005
Keywords
  • Microcrystalline Silicon
  • Photoluminescence
  • Solar Cells
  • Band Tails
  • Open-Circuit Voltage

Abstract

Abstract We developed a model describing the photoluminescence spectra from hydrogenated microcrystalline silicon (μc-Si:H). From the model we derived analytical relations between the separation of the quasi-Fermi levels and PL-peak energy and intensity. These relations may be useful when photoluminescence or electroluminescence based methods are applied for characterization of μc-Si:H solar cells and modules. We compared the model with experimental PL spectra from a μc-Si:H solar cell. Our model can consistently explain the relation between the measured PL-peak intensity, energy and the measured open circuit voltage of the μc-Si:H solar cell.

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