The intrinsic disorder related alloy scattering in ZrNiSn half-Heusler thermoelectric materials.
The intrinsic disorder related alloy scattering in ZrNiSn half-Heusler thermoelectric materials.
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ZrNiSn half-Heusler 热电材料中本征无序相关的合金散射
DOI:
10.1038/srep06888
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发表时间:
2014-11-03
影响因子:
4.6
通讯作者:
Zhu T
中科院分区:
文献类型:
--
作者:
Xie H;Wang H;Fu C;Liu Y;Snyder GJ;Zhao X;Zhu T
The intrinsic structural disorder dramatically affects the thermal and electronic transport in semiconductors. Although normally considered an ordered compound, the half-Heusler ZrNiSn displays many transport characteristics of a disordered alloy. Similar to the (Zr,Hf)NiSn based solid solutions, the unsubstituted ZrNiSn compound also exhibits charge transport dominated by alloy scattering, as demonstrated in this work. The unexpected charge transport, even in ZrNiSn which is normally considered fully ordered, can be explained by the Ni partially filling interstitial sites in this half-Heusler system. The influence of the disordering and defects in crystal structure on the electron transport process has also been quantitatively analyzed in ZrNiSn1-xSbxwith carrier concentrationnHranging from 5.0×1019to 2.3×1021cm−3by changing Sb dopant content. The optimized carrier concentrationnH≈ 3–4×1020cm−2results inZT≈ 0.8 at 875K. This work suggests thatMNiSn (M= Hf, Zr, Ti) and perhaps most other half-Heusler thermoelectric materials should be considered highly disordered especially when trying to understand the electronic and phonon structure and transport features.
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影响因子:
3.7
作者:
Chaput, L;Tobola, J;Scherrer, H
通讯作者:
Scherrer, H
影响因子:
3.2
作者:
Fu, Chenguang;Liu, Yintu;Zhu, Tiejun
通讯作者:
Zhu, Tiejun
影响因子:
4
作者:
Culp, SR;Poon, SJ;Blumm, J
通讯作者:
Blumm, J
影响因子:
--
作者:
KLEMENS, PG
通讯作者:
KLEMENS, PG
影响因子:
4
作者:
KRISHNAMURTHY, S;SHER, A;CHEN, AB
通讯作者:
CHEN, AB