Substitutional and interstitial impurity p-type doping of thermoelectric Mg2Si: a theoretical study
Substitutional and interstitial impurity p-type doping of thermoelectric Mg2Si: a theoretical study
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热电Mg2Si的取代和间隙杂质p型掺杂:理论研究
DOI:
10.1080/14686996.2019.1580537
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发表时间:
2019
影响因子:
5.5
通讯作者:
Hamada Noriaki
中科院分区:
文献类型:
--
作者:
Hirayama Naomi;Iida Tsutomu;Sakamoto Mariko;Nishio Keishi;Hamada Noriaki
The narrow-gap magnesium silicide semiconductor Mg2Si is a promising mid-temperature (600–900 K) thermoelectric material. It intrinsically possesses n-type conductivity, and n-type dopants are generally used for improving its thermoelectric performance; however, the synthesis of p-type Mg2Si is relatively difficult. In this work, the hole doping of Mg2Si with various impurity atoms is investigated by performing first principles calculations. It is found that the Ag-doped systems exhibit comparable formation energies ΔEcalculated for different impurity sites (Mg, Si, and interstitial 4b ones), which may explain the experimental instability of their p-type conductivity. A similar phenomenon is observed for the systems incorporating alkali metals (Li, Na, and K) since their ΔEvalues determined for Mg (p-type) and 4b (n-type) sites are very close. Among boron group elements (Ga and B), Ga is found to be favorable for hole doping because it exhibits relatively small ΔEvalues for Si (p-type) sites. Furthermore, the interstitial insertion of Cl and F atoms into the crystal lattice leads to hole doping because of their high electronegativity.
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影响因子:
3.7
作者:
G. M. Lopez;V. Fiorentini;G. Impellizzeri;S. Mirabella;E. Napolitani
通讯作者:
E. Napolitani
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
嶋村祐介;李 美龍,成田 吉弘;Tsutomu Iida
通讯作者:
Tsutomu Iida
影响因子:
2.1
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通讯作者:
T. Kajitani;M. Kubouchi;S. Kikuchi;K. Hayashi;T. Ueno;Y. Miyazaki;K. Yubuta
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
P. Simpson;Z. Jenei;P. Asoka;R. Robison;M. Law
通讯作者:
M. Law
DOI:
10.1016/s0031-8914(36)80226-2
发表时间:
1936
期刊:
影响因子:
--
作者:
W. Keesom;K. Taconis
通讯作者:
K. Taconis