Vacancy filling effect in thermoelectric NbO
Vacancy filling effect in thermoelectric NbO
复制标题
热电 NbO 中的空位填充效应
DOI:
10.1088/0953-8984/27/11/115501
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
D. Primetzhofer
中科院分区:
文献类型:
--
作者:
D. Music;Richard W. Geyer;Pascal Bliem;M. Hans;D. Primetzhofer
Using density functional theory, we have systematically explored the 1a and 1b vacancy filling in NbO (space group Pm-3m) with Nb and N, respectively, to design compounds with large Seebeck coefficients. The most dominating effect was identified for filling of 1b Wyckoff sites with N giving rise to a fivefold increase in the Seebeck coefficient. This may be understood based on the electronic structure. Nb d—nonmetal p hybridization induces quantum confinement and hence enables the enhancement of the Seebeck coefficient. This was validated by measuring the Seebeck coefficient of reactively sputtered thin films. At 800 °C these electrically conductive oxynitrides exhibit the Seebeck coefficient of −70 µV K−1, which is the largest absolute value ever reported for these compounds.
影响因子:
4
作者:
D. Music;F.H.-U. Basse;L. Han;Devender;T. Borca-Tasciuc;J.J. Gengler;A.A. Voevodin;G. Ramanath;J.M. Schneider
通讯作者:
J.M. Schneider
影响因子:
4
作者:
Music, Denis;Takahashi, Tetsuya;Schneider, Jochen M.
通讯作者:
Schneider, Jochen M.