Abstract
The density-of-state effective masses of impurity doped polycrystalline ZnO thin films were measured by the method of four coefficients technique. By applying the first-order non-parabolicity approximation, the polaron effective mass and the bare band mass at the conduction band minimum, together with the corresponding non-parabolicity parameters, were analysed successfully. The determined perpendicular polaron mass of 0.29 me and the bare band mass of 0.247 me at the conduction band minimum corresponded very well to the previous results obtained for ZnO single crystals. The non-parabolicity parameter of 0.457 eV-1 derived for the polaron effective mass was larger than 0.33 eV-1 which was obtained for the bare band mass due to the increasing function of the Fröhlich coupling constant with respect to the bare band mass in polycrystalline ZnO films.
| Original language | English |
|---|---|
| Article number | 195409 |
| Journal | Journal of Physics D: Applied Physics |
| Volume | 41 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 2008 Oct 7 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films
Cite this
Density-of-state effective mass and non-parabolicity parameter of impurity doped ZnO thin films. / Kim, W. M.; Kim, I. H.; Ko, J. H.; Cheong, B.; Lee, T. S.; Lee, K. S.; Kim, Donghwan; Seong, Tae Yeon.
In: Journal of Physics D: Applied Physics, Vol. 41, No. 19, 195409, 07.10.2008.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Density-of-state effective mass and non-parabolicity parameter of impurity doped ZnO thin films
AU - Kim, W. M.
AU - Kim, I. H.
AU - Ko, J. H.
AU - Cheong, B.
AU - Lee, T. S.
AU - Lee, K. S.
AU - Kim, Donghwan
AU - Seong, Tae Yeon
PY - 2008/10/7
Y1 - 2008/10/7
N2 - The density-of-state effective masses of impurity doped polycrystalline ZnO thin films were measured by the method of four coefficients technique. By applying the first-order non-parabolicity approximation, the polaron effective mass and the bare band mass at the conduction band minimum, together with the corresponding non-parabolicity parameters, were analysed successfully. The determined perpendicular polaron mass of 0.29 me and the bare band mass of 0.247 me at the conduction band minimum corresponded very well to the previous results obtained for ZnO single crystals. The non-parabolicity parameter of 0.457 eV-1 derived for the polaron effective mass was larger than 0.33 eV-1 which was obtained for the bare band mass due to the increasing function of the Fröhlich coupling constant with respect to the bare band mass in polycrystalline ZnO films.
AB - The density-of-state effective masses of impurity doped polycrystalline ZnO thin films were measured by the method of four coefficients technique. By applying the first-order non-parabolicity approximation, the polaron effective mass and the bare band mass at the conduction band minimum, together with the corresponding non-parabolicity parameters, were analysed successfully. The determined perpendicular polaron mass of 0.29 me and the bare band mass of 0.247 me at the conduction band minimum corresponded very well to the previous results obtained for ZnO single crystals. The non-parabolicity parameter of 0.457 eV-1 derived for the polaron effective mass was larger than 0.33 eV-1 which was obtained for the bare band mass due to the increasing function of the Fröhlich coupling constant with respect to the bare band mass in polycrystalline ZnO films.
UR - http://www.scopus.com/inward/record.url?scp=53349145952&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=53349145952&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/41/19/195409
DO - 10.1088/0022-3727/41/19/195409
M3 - Article
VL - 41
JO - Journal Physics D: Applied Physics
JF - Journal Physics D: Applied Physics
SN - 0022-3727
IS - 19
M1 - 195409
ER -