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Analysis of Zinc Compound Buffer Layers in Cu(In, Ga)(S, Se)2 Thin Film Solar Cells by Synchrotron-Based Soft X-Ray Spectroscopy

  • I. Lauermann (a1), M. Bär (a1), A. Ennaoui (a1), U. Fiedeler (a1), Ch-H. Fischer (a1), A. Grimm (a1), I. Kötschau (a1), M. Ch. Lux-Steiner (a1), J. Reichardt (a1), B. R. Sankapal (a1), S. Siebentritt (a1), S. Sokoll (a1), L. Weinhardt (a2), O. Fuchs (a2), C. Heske (a2), C. Jung (a3), W. Gudat (a3), F. Karg (a4) and T.P. Niesen (a4)...

Abstract

Zinc-based buffer layers like ZnSe, ZnS, or wet-chemically deposited ZnO on Cu(In, Ga)(S, Se)2 absorber materials (CIGSSe) have yielded thin film solar cell efficiencies comparable to or even higher than standard CdS/CIGSSe cells. However, little is known about surface and interface properties of these novel buffer layers. In this contribution we characterize the specific chemical environment at the absorber/buffer-interface using X-ray Emission Spectroscopy (XES) and Photoelectron Spectroscopy (PES) in a complementary way. Evidence of intermixing and chemical reactions is found for different buffer materials and deposition methods.

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Analysis of Zinc Compound Buffer Layers in Cu(In, Ga)(S, Se)2 Thin Film Solar Cells by Synchrotron-Based Soft X-Ray Spectroscopy

  • I. Lauermann (a1), M. Bär (a1), A. Ennaoui (a1), U. Fiedeler (a1), Ch-H. Fischer (a1), A. Grimm (a1), I. Kötschau (a1), M. Ch. Lux-Steiner (a1), J. Reichardt (a1), B. R. Sankapal (a1), S. Siebentritt (a1), S. Sokoll (a1), L. Weinhardt (a2), O. Fuchs (a2), C. Heske (a2), C. Jung (a3), W. Gudat (a3), F. Karg (a4) and T.P. Niesen (a4)...

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