Abstract
A novel transparent conducting spinel solid solution Cd(1+x)In(2-2x)Sn(x)O4 (0 ≤ x ≤ 0.75 at 1175 °C) between cubic CdIn2O4 and orthorhombic Cd2SnO4 has been discovered. The extent of this solid solution is noteworthy given that bulk phase relations determined in air over the temperature range 800-1175 °C demonstrate that cubic (spinel) Cd2SnO4 is metastable. Reduced samples exhibit exceptional four-point dc conductivities exceeding 3500 S/cm (x = 0.70). The maximum optical gap estimated from diffuse reflectance spectra is ~3.0 eV for 0 ≤ x ≤ 0.15. The optical gap shows negligible change with reduction, possibly because of combined Moss-Burstein and band-narrowing effects. Abrupt conductivity increases and optical gap decreases at specific compositions, i.e., x = 0.4 and 0.2 respectively, may be indicative of a change in cation distribution between tetrahedral and octahedral sites. Room temperature thermopower measurements indicate the change in conductivity across the solution is a consequence of an increase in carrier density and that mobility remains relatively constant.
| Original language | English |
|---|---|
| Pages (from-to) | 1954-1960 |
| Number of pages | 7 |
| Journal | Chemistry of Materials |
| Volume | 12 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2000 |
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ASJC Scopus subject areas
- Materials Science(all)
- Materials Chemistry
Cite this
Phase relationships, transparency, and conductivity in the cadmium indate-cadmium stannate system. / Kammler, D. R.; Mason, Thomas O; Poeppelmeier, Kenneth R.
In: Chemistry of Materials, Vol. 12, No. 7, 2000, p. 1954-1960.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase relationships, transparency, and conductivity in the cadmium indate-cadmium stannate system
AU - Kammler, D. R.
AU - Mason, Thomas O
AU - Poeppelmeier, Kenneth R
PY - 2000
Y1 - 2000
N2 - A novel transparent conducting spinel solid solution Cd(1+x)In(2-2x)Sn(x)O4 (0 ≤ x ≤ 0.75 at 1175 °C) between cubic CdIn2O4 and orthorhombic Cd2SnO4 has been discovered. The extent of this solid solution is noteworthy given that bulk phase relations determined in air over the temperature range 800-1175 °C demonstrate that cubic (spinel) Cd2SnO4 is metastable. Reduced samples exhibit exceptional four-point dc conductivities exceeding 3500 S/cm (x = 0.70). The maximum optical gap estimated from diffuse reflectance spectra is ~3.0 eV for 0 ≤ x ≤ 0.15. The optical gap shows negligible change with reduction, possibly because of combined Moss-Burstein and band-narrowing effects. Abrupt conductivity increases and optical gap decreases at specific compositions, i.e., x = 0.4 and 0.2 respectively, may be indicative of a change in cation distribution between tetrahedral and octahedral sites. Room temperature thermopower measurements indicate the change in conductivity across the solution is a consequence of an increase in carrier density and that mobility remains relatively constant.
AB - A novel transparent conducting spinel solid solution Cd(1+x)In(2-2x)Sn(x)O4 (0 ≤ x ≤ 0.75 at 1175 °C) between cubic CdIn2O4 and orthorhombic Cd2SnO4 has been discovered. The extent of this solid solution is noteworthy given that bulk phase relations determined in air over the temperature range 800-1175 °C demonstrate that cubic (spinel) Cd2SnO4 is metastable. Reduced samples exhibit exceptional four-point dc conductivities exceeding 3500 S/cm (x = 0.70). The maximum optical gap estimated from diffuse reflectance spectra is ~3.0 eV for 0 ≤ x ≤ 0.15. The optical gap shows negligible change with reduction, possibly because of combined Moss-Burstein and band-narrowing effects. Abrupt conductivity increases and optical gap decreases at specific compositions, i.e., x = 0.4 and 0.2 respectively, may be indicative of a change in cation distribution between tetrahedral and octahedral sites. Room temperature thermopower measurements indicate the change in conductivity across the solution is a consequence of an increase in carrier density and that mobility remains relatively constant.
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U2 - 10.1021/cm000101w
DO - 10.1021/cm000101w
M3 - Article
VL - 12
SP - 1954
EP - 1960
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 7
ER -