Evidence for tetrahedral zinc in amorphous In2-2xZn xSnxO3 (a-ZITO)

Cathleen A. Hoel, Sujing Xie, Chris Benmore, Christos D. Malliakas, Jean François Gaillard, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The structure of amorphous In2-2xZnxSn xO3 (a-ZITO, x = 0.2, 0.3, 0.4) was investigated with transmission electron microscopy (TEM), the total scattering pair-distribution function (PDF) and X-ray absorption spectroscopy (XAS), which revealed a well-defined short-range structure that differed from the crystalline bixbyite and corundum ZITO polymorphs. The X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) were used to detect InO6 and SnO6 octahedra and ZnO4 tetrahedra in a-ZITO, which differ from the InO6, SnO6 and ZnO 6 pseudo-octahedra that are observed in the bixbyite and corundum ZITO polymorphs. The formation of the ZnO4 tetrahedron likely inhibits the crystallization of ZITO when synthesized under mild conditions. in situ XRD showed a gradual transition from a-ZITO to a mixture of the bixbyite and corundum ZITO polymorphs as the temperature was raised from 300 °C to 568 °C.

Original languageEnglish
Pages (from-to)885-894
Number of pages10
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume637
Issue number7-8
DOIs
Publication statusPublished - Jul 2011

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Aluminum Oxide
Polymorphism
Zinc
X ray absorption
X ray absorption spectroscopy
Crystallization
Distribution functions
Scattering
Crystalline materials
Transmission electron microscopy
Temperature

Keywords

  • Absorption spectroscopy
  • Transparent conducting oxides
  • Transparent oxide semiconductor
  • Zinc
  • Zinc indium tin oxide

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Evidence for tetrahedral zinc in amorphous In2-2xZn xSnxO3 (a-ZITO). / Hoel, Cathleen A.; Xie, Sujing; Benmore, Chris; Malliakas, Christos D.; Gaillard, Jean François; Poeppelmeier, Kenneth R.

In: Zeitschrift fur Anorganische und Allgemeine Chemie, Vol. 637, No. 7-8, 07.2011, p. 885-894.

Research output: Contribution to journalArticle

Hoel, Cathleen A. ; Xie, Sujing ; Benmore, Chris ; Malliakas, Christos D. ; Gaillard, Jean François ; Poeppelmeier, Kenneth R. / Evidence for tetrahedral zinc in amorphous In2-2xZn xSnxO3 (a-ZITO). In: Zeitschrift fur Anorganische und Allgemeine Chemie. 2011 ; Vol. 637, No. 7-8. pp. 885-894.
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AB - The structure of amorphous In2-2xZnxSn xO3 (a-ZITO, x = 0.2, 0.3, 0.4) was investigated with transmission electron microscopy (TEM), the total scattering pair-distribution function (PDF) and X-ray absorption spectroscopy (XAS), which revealed a well-defined short-range structure that differed from the crystalline bixbyite and corundum ZITO polymorphs. The X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) were used to detect InO6 and SnO6 octahedra and ZnO4 tetrahedra in a-ZITO, which differ from the InO6, SnO6 and ZnO 6 pseudo-octahedra that are observed in the bixbyite and corundum ZITO polymorphs. The formation of the ZnO4 tetrahedron likely inhibits the crystallization of ZITO when synthesized under mild conditions. in situ XRD showed a gradual transition from a-ZITO to a mixture of the bixbyite and corundum ZITO polymorphs as the temperature was raised from 300 °C to 568 °C.

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