Structural principles and thermoelectric properties of polytypic group 14 clathrate-II frameworks.
Structural principles and thermoelectric properties of polytypic group 14 clathrate-II frameworks.
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多型14族笼形II骨架的结构原理和热电性能
DOI:
10.1002/cphc.201300133
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
T. F. Fässler
中科院分区:
文献类型:
--
作者:
A. Karttunen;T. F. Fässler
We have investigated the structural principles and thermoelectric properties of polytypic group 14 clathrate‐II frameworks using quantum chemical methods. The experimentally known cubic 3C polytype was found to be the energetically most favorable framework, but the studied hexagonal polytypes (2 H, 4 H, 6 H, 8 H, 10 H) lie energetically close to it. In the case of germanium, the energy difference between the 3C and 6H clathrate‐II polytypes is ten times smaller than the difference between the experimentally known 3C‐Ge (α‐Ge) and 4H‐Ge polytypes. The thermoelectric properties of guest‐occupied clathrate‐II structures were investigated for compositions Na–Rb–Ga–Ge and Ge–As–I. The clathrate‐II structures show promising thermoelectric properties and the highest Seebeck coefficients and thermoelectric power factors were predicted for the 3C polytype. The structural anisotropy of the largest studied hexagonal polytypes affects their thermoelectric power factors by over a factor of two.
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影响因子:
4
作者:
Avila, M. A.;Suekuni, K.;Takabatake, T.
通讯作者:
Takabatake, T.
影响因子:
--
作者:
T. Fässler
通讯作者:
T. Fässler
影响因子:
3.5
作者:
Ammar, A;Cros, C;Reny, E
通讯作者:
Reny, E
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
M. O'Keeffe;G. Adams;O. Sankey
通讯作者:
O. Sankey
DOI:
10.1107/s0108767384000842
发表时间:
1984-01-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION A
影响因子:
--
作者:
GUINIER, A
通讯作者:
GUINIER, A