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Photoinduced Reversible Conductivity and Photoconductivity Changes in Transparent Amorphous and Micro-Crystalline In2O3-X Films

Published online by Cambridge University Press:  10 February 2011

P. Stradins ,
H. Fritzsche  and
B. Claflin
P. Stradins
Affiliation:
James Franck Institute, University of Chicago, Chicago, Illinois 60637
H. Fritzsche
Affiliation:
James Franck Institute, University of Chicago, Chicago, Illinois 60637
B. Claflin
Affiliation:
James Franck Institute, University of Chicago, Chicago, Illinois 60637
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Abstract

The dark conductivity σ of poorly conducting In2O3-x films can be enhanced by orders of magnitude by blue or UV light exposure at any temperature between 4.2K and 300K. The resulting high σ state of amorphous films reverts back to its original low σ state upon heating to 400K in an inert gas and can be repeated many times. In crystalline films the high σ state is stable to higher temperatures where annealing leads to some outdiffusion of oxygen and hence to a conductivity increase which can only be reversed by external re-oxidation. The photoinduced increase in dark conductivity is accompanied by an increase in photoconductivity at hv = 0.6 or 2eV by a factor of 107 at 4.2K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 426: Symposium J – Thin Films for Photovoltaic and Related Device , 1996 , 455
Copyright
Copyright © Materials Research Society 1996

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References

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