Publikation:

Quantitative interpretation of light beam induced current contrast profiles for differing diffusion lengths on either side of a grain boundary

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Micard_161199.pdf
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2008

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http://nbn-resolving.de/urn:nbn:de:bsz:352-161199
DOI (zitierfähiger Link)
https://doi.org/10.4229/23rdEUPVSEC2008-1CV.1.57
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Published

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LINCOT, D., ed. and others. The compiled state-of-the-art of PV solar technology and deployment : 23rd European Photovoltaic Solar Energy Conference. Munich, Germany: WIP-Renewable Energies, 2008, pp. 416-420. ISBN 3-936338-24-8. Available under: doi: 10.4229/23rdEUPVSEC2008-1CV.1.57

Zusammenfassung

The quantitative interpretation of a Light Beam Induced Current (LBIC) contrast profile (LBIC signal normalized to the signal infinitely far from the grain boundary) of a Grain Boundary (GB) allows the estimation of the diffusion length in the neighboring grains (left grain L1, right grain L2,) as well as the recombination strength of the GB characterized by its equivalent Surface Recombination Velocity (SRV) vs. The quantitative evaluation of L1, L2 and vs is very useful regarding e.g. the evaluation of the effectiveness of a hydrogenation step in a solar cell process. For this purpose, we developed a direct fitting procedure based on a particular solution of the minority carrier diffusion equation with suitable boundary conditions. This theory, initially developed by C. Donolato for analyzing EBIC and/or LBIC contrast profiles, had the limitation to assume the same diffusion length (Ldiff) for both neighboring grains which cannot account for non symmetrical contrast profile due to differing Ldiff and can thus lead to erroneous evaluation of Ldiff , in particular when the SRV of the GB is low. The present contribution fixes this problem by generalizing Donolato’s theory for differing diffusion lengths on either side of the GB, and so allows non symmetrical profiles to be investigated.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

recombination, modelling, modeling, grain boundary

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23rd European Photovoltaic Solar Energy Conference, EU PVSEC, 1. Sept. 2008 - 5. Sept. 2008, Valencia, Spain
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ISO 690MICARD, Gabriel, Sven SEREN, Giso HAHN, 2008. Quantitative interpretation of light beam induced current contrast profiles for differing diffusion lengths on either side of a grain boundary. 23rd European Photovoltaic Solar Energy Conference, EU PVSEC. Valencia, Spain, 1. Sept. 2008 - 5. Sept. 2008. In: LINCOT, D., ed. and others. The compiled state-of-the-art of PV solar technology and deployment : 23rd European Photovoltaic Solar Energy Conference. Munich, Germany: WIP-Renewable Energies, 2008, pp. 416-420. ISBN 3-936338-24-8. Available under: doi: 10.4229/23rdEUPVSEC2008-1CV.1.57
BibTex
@inproceedings{Micard2008Quant-16119,
  year={2008},
  doi={10.4229/23rdEUPVSEC2008-1CV.1.57},
  title={Quantitative interpretation of light beam induced current contrast profiles for differing diffusion lengths on either side of a grain boundary},
  isbn={3-936338-24-8},
  publisher={WIP-Renewable Energies},
  address={Munich, Germany},
  booktitle={The compiled state-of-the-art of PV solar technology and deployment : 23rd European Photovoltaic Solar Energy Conference},
  pages={416--420},
  editor={Lincot, D.},
  author={Micard, Gabriel and Seren, Sven and Hahn, Giso}
}
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