ANNEALING OF POLYCRYSTALLINE THIN FILM SILICON SOLAR CELLS IN WATER VAPOUR AT SUB-ATMOSPHERIC PRESSURES

Authors

  • Peter Pikna Department of Electrotechnology, Czech Technical University, Technicka 2, 166 27 Prague, Czech Republic Institute of Physics, Academy of Sciences of CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic tel.: 00420 220 318 528, fax.: 00420 220 318 468, pikna@fzu.cz
  • Vlastimil Píč Institute of Physics, Academy of Sciences of CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic
  • Vítězslav Benda Department of Electrotechnology, Czech Technical University, Technicka 2, 166 27 Prague, Czech Republic
  • Antonín Fejfar Institute of Physics, Academy of Sciences of CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic

DOI:

https://doi.org/10.14311/AP.2014.54.0341

Abstract

Thin film polycrystalline silicon (poly-Si) solar cells were annealed in water vapour at pressures below atmospheric pressure. PN junction of the sample was contacted by measuring probes directly in the pressure chamber filled with steam during passivation. Suns-VOC method and a Lock-in detector were used to monitor an effect of water vapour to VOC of the solar cell during whole passivation process (in-situ). Tested temperature of the sample (55°C – 110°C) was constant during the procedure. Open-circuit voltage of a solar cell at these temperatures is lower than at room temperature. Nevertheless, voltage response of the solar cell to the light flash used during Suns-VOC measurements was good observable. Temperature dependences for multicrystalline wafer-based and polycrystalline thin film solar cells were measured and compared. While no significant improvement of thin film poly-Si solar cell parameters by annealing in water vapour at under-atmospheric pressures was observed up to now, in-situ observation proved required sensitivity to changing VOC at elevated temperatures during the process.

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Author Biographies

Peter Pikna, Department of Electrotechnology, Czech Technical University, Technicka 2, 166 27 Prague, Czech Republic Institute of Physics, Academy of Sciences of CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic tel.: 00420 220 318 528, fax.: 00420 220 318 468, pikna@fzu.cz

Department of Thin Films and Nanostructures; Department of Electrotechnology

Vlastimil Píč, Institute of Physics, Academy of Sciences of CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic

Department of Thin Films and Nanostructures

Vítězslav Benda, Department of Electrotechnology, Czech Technical University, Technicka 2, 166 27 Prague, Czech Republic

Department of Electrotechnology

Antonín Fejfar, Institute of Physics, Academy of Sciences of CR, Cukrovarnicka 10, 162 53 Prague, Czech Republic

Department of Thin Films and Nanostructures

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Published

2014-10-31

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Articles