Cation Distribution of the Transparent Conductor and Spinel Oxide Solution Cd1+xIn2-2xSnxO4

D. Ko, K. R. Poeppelmeier, D. R. Kammler, G. B. Gonzalez, T. O. Mason, D. L. Williamson, D. L. Young, T. J. Coutts

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The cation distribution in the transparent conducting oxide Cd1+xIn2-2xSnxO4 was investigated to determine if there is a correlation between structure and electronic properties. Combined Rietveld refinements of neutron and X-ray diffraction data and119Sn Mössbauer spectroscopic analysis were used to show that the cation distribution changed with x (0 ≤ x ≤ 0.7) from a primarily normal spinel (x=0) to an increasingly random spinel. CdIn2O4 quenched from 1175°C has an inversion parameter of 0.31 (i.e., (Cd0.69In0.31)tet(In1.69Cd0.31)octO4). The inversion parameter decreases to 0.27 as the quench temperature is lowered from 1175°C to 1000°C. The decrease in inversion parameter with temperature correlates with an increase in optical gap from 3.0 eV to 3.3 eV for specimens prepared at 1175°C and 800°C, respectively. We show that this is a consequence of an increase in the fundamental band gap.

Original languageAmerican English
Pages (from-to)259-266
Number of pages8
JournalJournal of Solid State Chemistry
Issue number1
StatePublished - 2002

NREL Publication Number

  • NREL/JA-520-32040


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