The Influence of Metastabilities on the Luminescence in the Cu(In,Ga)Se_2 Solar Cells

• Authors: D. Prządo , M. Igalson , R. Bacewicz , M. Edoff
• Languages of publication: EN

Abstracts

EN

Photoluminescence and electroluminescence spectra of the absorber layer in ZnO/CdS/Cu(In,Ga)Se_2 solar cells were measured. Their dependence on temperature, excitation intensity and applied voltage were studied. Electroluminescence measurements were used to investigate light- and bias-induced metastabilities in the absorber of the cells. We showed that metastable changes of defect distributions, which produce an effect on the electrical characteristics of ZnO/CdS/Cu(In,Ga)Se_2 material, affect also the luminescence yield. The dependence of the intensity and shape of the electroluminescence spectra on the state of the sample is observed. These results fit well into the theoretical calculations of Lany and Zunger model showing that divacancy complex (V_{Se}-V_{Cu}) is responsible for metastable changes observed in ZnO/CdS/Cu(In,Ga)Se_2-based solar cells. We conclude that during light soaking or/and forward bias the probability of nonradiative recombination is decreased.

Keywords

EN

78.55.-m; 78.60.Fi; 73.40.Lq; 73.61.Le; 72.40.+w

Discipline

• 73.61.Le: Other inorganic semiconductors
• 78.60.Fi: Electroluminescence
• 78.55.-m: Photoluminescence, properties and materials(for time resolved luminescence, see 78.47.jd)
• 73.40.Lq: Other semiconductor-to-semiconductor contacts,p-njunctions, and heterojunctions
• 72.40.+w: Photoconduction and photovoltaic effects

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 2
• Pages: 183-189

Dates

published

2007-08

received

2007-06-09

Contributors

author

D. Prządo

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

M. Igalson

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

R. Bacewicz

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

M. Edoff

• Uppsala University, Ångström Solar Center, Uppsala, Sweden

References

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Identifiers

DOI

10.12693/APhysPolA.112.183