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Key Structural and Defect Chemical Aspects of Cd-In-Sn-O Transparent Conducting Oxides

  • T. O. Mason
  • , D. R. Kammler
  • , B. J. Ingram
  • , G. B. Gonzalez
  • , D. L. Young
  • , T. J. Coutts
  • Northwestern University
  • Sandia Laboratories Albuquerque
  • National Renewable Energy Laboratory

Research output: Contribution to journalArticlepeer-review

18 Scopus Citations

Abstract

The equilibrium phase diagram (1175 °C in air), solubility ranges and room temperature physical properties (electrical, optical) were established for the various n-type transparent conductors in the CdO-In2O 3-SnO2 system. Extended solubility ranges were found to exist at constant Cd/Sn ratio for the bixbyite, spinel and orthorhombic perovskite phases. This is attributed to the isovalent and nearly size-matched nature of the co-substitution. Still larger solubility ranges were found for metastably-processed thin films. Co-doped bixyite and spinel phases were found to be inherently off-stoichiometric with respect to cation composition, leading to self-doped n-type character, in bulk and films. A correlation was found between optimized conductivity in the various phases and the density of octahedral Cd, In and/or Sn species in their crystal structures.

Original languageAmerican English
Pages (from-to)186-192
Number of pages7
JournalThin Solid Films
Volume445
Issue number2
DOIs
StatePublished - 2003
EventProceedings of the 3rd International Symposium on Transparent Oxide - Tokyo, Japan
Duration: 10 Apr 200311 Apr 2003

NLR Publication Number

  • NREL/JA-520-35930

Keywords

  • Bixbyite
  • Cd-In-Sn-O system
  • Perovskite
  • Spinel
  • Transparent conducting oxide (TCO)

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