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Characterization of GaAs solar cells made by ion implantation and rapid thermal annealing using selective photoetching

Published online by Cambridge University Press:  31 January 2011

W.G.J.H.M. van Sark ,
J.L. Weyher ,
L.J. Giling ,
M. de Potter  and
M. van Rossum
W.G.J.H.M. van Sark
Affiliation:
Department of Experimental Solid State Physics, RIM, Faculty of Science, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
J.L. Weyher
Affiliation:
Department of Experimental Solid State Physics, RIM, Faculty of Science, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
L.J. Giling
Affiliation:
Department of Experimental Solid State Physics, RIM, Faculty of Science, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
M. de Potter
Affiliation:
IMEC v.z.w., Kapeldreef 75, 3030 Leuven, Belgium
M. van Rossum
Affiliation:
IMEC v.z.w., Kapeldreef 75, 3030 Leuven, Belgium
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Abstract

Shallow n-p GaAs solar cells have been made by implantation of Si into Zn-doped (p-type) GaAs substrates followed by rapid thermal annealing. The structure of the GaAs crystal has been determined by the DSL photoetching method (Diluted Sirtl-like etchants used with Light). It was found that implantation-induced-damage (revealed by DSL as microroughness and craters) was not removed after annealing for energies exceeding 60 keV. This leads to substrates that contain many precipitates, which appears to be disastrous for the fabrication of good solar cells. In addition, good cell performance is hampered by compensation effects in the n-p transition region and in the n-type layer itself.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 5 , May 1990 , pp. 1042 - 1051
Copyright
Copyright © Materials Research Society 1990

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