Separating the Influence of Material Composition and Local Defects on the Voc of CIGS Solar Modules

Hepp J, Vetter A, Hofbeck B, Camus C, Hauch J, Brabec C (2017)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2017

Pages Range: 1010-1012

Conference Proceedings Title: 33rd European Photovoltaic Solar Energy Conference and Exhibition

Event location: Amsterdam NL

ISBN: 3-936338-47-7

URI: http://www.eupvsec-proceedings.com/proceedings?paper=42711

DOI: 10.4229/EUPVSEC20172017-3AO.8.2

Abstract

In spite of the steadily improved quality of co-evaporated Cu(In,Ga)Se2 absorber layers, the existence of local defects affecting the module performance in large area production can still be an issue. Generally, both, lateral composition gradients and point defects can be found in those layers. We show the necessity to separate these two influences and propose two measurement techniques in order to asses the effect of the material and the defects individually. In oder to quantify the theoretical defect-free open circuit voltage (Voc), given by the material composition, we used luminescence spectroscopy. The additional effect on the Voc originating from local defects was determined using dark lock-in thermography. The combination of both these methods enables a local prediction of a module’s Voc. In the following, we conduct an indepth analysis of the determination of the material composition and its impact on the resulting Voc.

Authors with CRIS profile

Johannes Hepp Institute Materials for Electronics and Energy Technology (i-MEET) Andreas Vetter Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern) DE Germany (DE)

How to cite

APA:

Hepp, J., Vetter, A., Hofbeck, B., Camus, C., Hauch, J., & Brabec, C. (2017). Separating the Influence of Material Composition and Local Defects on the Voc of CIGS Solar Modules. In 33rd European Photovoltaic Solar Energy Conference and Exhibition (pp. 1010-1012). Amsterdam, NL.

MLA:

Hepp, Johannes, et al. "Separating the Influence of Material Composition and Local Defects on the Voc of CIGS Solar Modules." Proceedings of the 33rd European Photovoltaic Solar Energy Conference and Exhibition, Amsterdam 2017. 1010-1012.

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