Novel RGS materials with high fill factors and no material-induced shunts with record solar cell efficiencies exceeding 16%

Botchak, Yves Patrick; Zuschlag, Annika; Pichon, Pierre-Yves; Fritz, Jakob; Schönecker, Axel; Hahn, Giso

Novel RGS materials with high fill factors and no material-induced shunts with record solar cell efficiencies exceeding 16%

Dateien

Botchak_0-321842.pdfGröße: 1.49 MBDownloads: 390

Datum

2016

Autor:innen

Botchak, Yves Patrick

Zuschlag, Annika

Pichon, Pierre-Yves

Fritz, Jakob

Schönecker, Axel

Hahn, Giso

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Solar Energy Materials and Solar Cells. 2016, 146, pp. 25-34. ISSN 0927-0248. eISSN 1879-3398. Available under: doi: 10.1016/j.solmat.2015.11.022

Zusammenfassung

Kerf losses due to ingot and wafer sawing can be avoided by solidifying the silicon wafers directly from the melt by the Ribbon Growth on Substrate (RGS) process, thus significantly reducing the wafer cost. However, up to now solar cells made from standard RGS material suffered from shunting problems due to current collecting structures. This resulted in lower fill factor values and hence in lower efficiencies compared to solar cells made from block-cast multicrystalline silicon (mc-Si) materials. In this contribution two novel RGS materials are presented and investigated. Solar cells processed from these new materials have fill factor values above 78%, comparable to those of mc-Si. The increased fill factor values can be explained by the absence of current collecting structures as concluded from a comparative analysis of spatially resolved Light Beam Induced Current (LBIC) measurements and Electroluminescence (EL) images, and from infrared transmission microscopy investigations. Additionally the improved material quality resulted in open-circuit voltage V_OC values up to 608 mV. This enhanced material quality, in combination with increased fill factor values, resulted in record efficiencies above 16% (certified by Fraunhofer ISE CalLab). This represents a significant improvement compared to the former efficiency record of 14.4% for standard RGS material.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BOTCHAK, Yves Patrick, Annika ZUSCHLAG, Pierre-Yves PICHON, Jakob FRITZ, Axel SCHÖNECKER, Giso HAHN, 2016. Novel RGS materials with high fill factors and no material-induced shunts with record solar cell efficiencies exceeding 16%. In: Solar Energy Materials and Solar Cells. 2016, 146, pp. 25-34. ISSN 0927-0248. eISSN 1879-3398. Available under: doi: 10.1016/j.solmat.2015.11.022

BibTex

@article{Botchak2016Novel-33561,
  year={2016},
  doi={10.1016/j.solmat.2015.11.022},
  title={Novel RGS materials with high fill factors and no material-induced shunts with record solar cell efficiencies exceeding 16%},
  volume={146},
  issn={0927-0248},
  journal={Solar Energy Materials and Solar Cells},
  pages={25--34},
  author={Botchak, Yves Patrick and Zuschlag, Annika and Pichon, Pierre-Yves and Fritz, Jakob and Schönecker, Axel and Hahn, Giso}
}

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