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Variant structure in metal-organic-chemical-vapor-deposition-derived SnO2 thin films on sapphire (0001)

Published online by Cambridge University Press:  03 March 2011

Donhang Liu ,
Q. Wang ,
H.L.M. Chang  and
Haydn Chen
Donhang Liu
Affiliation:
Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801
Q. Wang
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
H.L.M. Chang
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
Haydn Chen
Affiliation:
Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801
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Abstract

Tin oxide (SnO2) thin films were deposited on sapphire (0001) substrate by metal-organic chemical vapor deposition (MOCVD) at temperatures of 600 and 700 °C. The microstructure of the deposited films was characterized by x-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). At the growth conditions studied, films were single-phase rutile and epitaxial, but showed variant structures. Three distinct in-plane epitaxial relationships were observed between the films and the substrate. A crystallographic model is proposed to explain the film morphology. This model can successfully predict the ratio of the width to the length of an averaged grain size based upon the lattice mismatch of the film-substrate interface.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 6 , June 1995 , pp. 1516 - 1522
Copyright
Copyright © Materials Research Society 1995

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References

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