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Electrical, Optical, and Structural Properties of Tin-Doped In2O3–M2O3 Solid Solutions (M=Y, Sc)

✍ Scribed by Andrea Ambrosini; Angel Duarte; Kenneth R. Poeppelmeier; Melissa Lane; Carl R. Kannewurf; Thomas O. Mason

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
186 KB
Volume
153
Category
Article
ISSN
0022-4596

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✦ Synopsis

In 2 O 3 crystallizes in the bixbyite, or C-type rare earth, structure (space group Ia3), as do the smaller lanthanide oxides (Tb+Lu) and the oxides of Y and Sc. Solid solutions of In 2؊x M x O 3؊ (M ‫؍‬ Y or Sc) with varying lattice parameters were prepared and doped with tin. Substitution of tin oxide into In 2؊x Y x O 3؊ results in the formation of the pyrochlore phase, Y 2 Sn 2 O 7 . The pyrochlore dominates the Y+In+Sn oxide ternary phase diagram and prevents the tin from donating charge carriers. Solid solutions in which M ‫؍‬ Sc could be reacted with a limited amount of tin oxide without the formation of a second phase. The presence of increasing scandium results in decreasing conductivity with a corresponding increase in the optical band gap and percent transmission.

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