Experimental and theoretical exploration of mechanical stability of Pt/NbO2 interfaces for thermoelectric applications
Experimental and theoretical exploration of mechanical stability of Pt/NbO2 interfaces for thermoelectric applications
复制标题
热电应用 Pt/NbO2 界面机械稳定性的实验和理论探索
DOI:
10.1088/1361-6463/aa8daf
复制
发表时间:
--
期刊:
影响因子:
--
通讯作者:
A. Saksena
中科院分区:
文献类型:
--
作者:
D. Music;P. Schmidt;A. Saksena
Mechanical stability criteria for metallic contacts, namely a minimised thermal stress and an enhanced interfacial strength, have been appraised for sputtered, x-ray amorphous NbO 2 thermoelectric thin films in contact with a polycrystalline Pt electrode utilising experimental and theoretical methods. Thermal stress built at these Pt/NbO 2 interfaces with approximately 50 MPa is minute even at 800 C, the maximum operation temperature. There are no coordination changes of Pt and its metallic character is only marginally altered upon the interface formation. In addition, Nb–O bonds at the interface sustain their covalent-ionic dioxide bonding nature. Hence, even though there are no considerable modifications in the electronic structure of the individual components at these interfaces, Pt/NbO 2 interfacial bonds of metallic and partly covalent character are strong with a work of separation reaching 2 J m− 2. Based on the synergic experimental and theoretical results, it is therefore expected that these interfaces are mechanically stable during operation of these thermoelectric devices. This strategy is of general importance for designing mechanically stable electrical contacts.
登录
查看更多内容
DOI:
10.1088/1361-648x/aa53ac
发表时间:
2017
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
D. Music;V. Schnabel;J. Bednarcik
通讯作者:
J. Bednarcik
影响因子:
4
作者:
J. A. Roberson;R. Rapp
通讯作者:
R. Rapp
影响因子:
4
作者:
D. Music;O. Kremer;G. Pernot;J. Schneider
通讯作者:
D. Music;O. Kremer;G. Pernot;J. Schneider
影响因子:
3.7
作者:
A. O’Hara;A. Demkov
通讯作者:
A. O’Hara;A. Demkov
影响因子:
2.1
作者:
J. Rahman;Eun-Ji Meang;D. Nguyen;W. Seo;A. Hussain;M. Kim;Soonil Lee
通讯作者:
J. Rahman;Eun-Ji Meang;D. Nguyen;W. Seo;A. Hussain;M. Kim;Soonil Lee