scholarly journals The effect of nano-twins on the thermoelectric properties of Ga2O3(ZnO)m (m = 9, 11, 13 and 15) homologous compounds

2020 ◽  
Vol 40 (15) ◽  
pp. 5549-5558
Author(s):  
D.T. Alvarez-Ruiz ◽  
F. Azough ◽  
Thomas Slater ◽  
Sarah J. Day ◽  
R. Freer
Keyword(s):  
Thermoelectric Properties ◽  
Homologous Compounds

Thermoelectric Properties of Homologous Compounds in the ZnO-In2O3 System

1996 ◽  
Vol 79 (8) ◽  
pp. 2193-2196 ◽  
Author(s):  
Hiromichi Ohta ◽  
Won-Seon Seo ◽  
Kunihito Koumoto
Keyword(s):  
Thermoelectric Properties ◽  
Homologous Compounds

Improvement in thermoelectric properties of (ZnO)5In2O3 through partial substitution of yttrium for indium

1998 ◽  
Vol 13 (3) ◽  
pp. 523-526 ◽  
Author(s):  
Masaki Kazeoka ◽  
Hidenori Hiramatsu ◽  
Won-Seon Seo ◽  
Kunihito Koumoto
Keyword(s):  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Lattice Structure ◽  
Partial Substitution ◽  
Unusual Behavior ◽  
Thermoelectric Figure ◽  
Hexagonal System ◽  
Thermoelectric Energy ◽  
Homologous Compounds ◽  
Y Substitution

We first measured the thermoelectric properties of layer-structured homologous compounds, (ZnO)mIn2O3 (m = integer), and reported that they would becomecandidate materials for high-temperature thermoelectric energy conversion.1–4 We further tried to improve their thermoelectric properties by partially substituting yttrium for indium in (ZnO)5In2O3. Though the ionic radius of Y3+ is larger than that of In3+, the a-axis (hexagonal system) elongated and c-axis shrank as Y was substituted for In. The thermoelectric properties were found to vary with a varying amount of Y substitution; 3% Y substitution gave rise to the largest thermoelectric figure of merit, i.e., 1.1 - 1.3 × 10-4 K-1 at 960–1100 K. The abnormal change in the lattice structure by Y substitution was responsible for the unusual behavior of the thermoelectric properties.

scholarly journals Thermoelectric Properties of the Homologous Compounds Pb5Bi6Se14−xI x (x = 0.0, 0.025, and 0.05)

2018 ◽  
Vol 47 (6) ◽  
pp. 3198-3202
Author(s):  
S. Sassi ◽  
C. Candolfi ◽  
A. Dauscher ◽  
B. Lenoir
Keyword(s):  
Thermoelectric Properties ◽  
Homologous Compounds

Thermoelectric properties of sintered polycrystalline ZnIn2S4

1999 ◽  
Vol 14 (11) ◽  
pp. 4176-4181 ◽  
Author(s):  
Won-Seon Seo ◽  
Riki Otsuka ◽  
Harumi Okuno ◽  
Mitsuru Ohta ◽  
Kunihito Koumoto
Keyword(s):  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Layer Structure ◽  
Thermoelectric Figure Of Merit ◽  
Reaction Sintering ◽  
Thermoelectric Figure ◽  
Spinel Type ◽  
Homologous Compounds ◽  
Ceramic Process ◽  
Increasing Temperature

Ceramic compacts of spinel-type ZnIn2S4 and IIIa-ZnIn2S4 polytype with a layer structure were synthesized by the reaction-sintering of mixed powders of ZnS and In2S3 at 723 K and 1073 K in Ar (containing 1° H2) atmosphere, respectively. The thermoelectric properties were investigated in the temperature range from 473 to 873 K. Thermoelectric figure of merit of the IIIa type was much larger than that of the spinel type, and it was slightly higher than the figure of merit of (ZnO)9In2O3, which is known to show the largest value among the oxide homologous compounds. To improve the thermoelectric properties, a c-plane-oriented sintered body of the IIIa polytype was successfully fabricated by a usual ceramic process. The figure of merit in the direction on the c plane was larger than on the ab plane due to higher electrical conductivity on the c plane and increased with increasing temperature showing the largest value of 1.3 × 10−4 K−1 at 873 K.

scholarly journals Synthesis and transport properties of the Te-substituted homologous compounds Pb5Bi6Se14−xTex (0 ≤ x ≤ 1.0)

2018 ◽  
Vol 47 (13) ◽  
pp. 4714-4721
Author(s):  
Selma Sassi ◽  
Christophe Candolfi ◽  
Christine Gendarme ◽  
Anne Dauscher ◽  
Bertrand Lenoir
Keyword(s):  
Transport Properties ◽  
Thermoelectric Properties ◽  
Homologous Compounds ◽  
Wide Range

This work reports a detailed study of the influence of substituting Te for Se on the thermoelectric properties of the homologous compound Pb5Bi6Se14 in a wide range of temperatures (2–723 K) yielding a peak ZT of 0.5 at 723 K.

Synthesis and thermoelectric properties of the pseudo-binary skutterudites CoGe1.5Se1.5 and CoSn1.5Te1.5

2008 ◽  
Author(s):  
David Johnson ◽  
Qiyin Lin ◽  
Mary Smeller ◽  
Colby Heideman ◽  
Arwyn L. E. Smalley
Keyword(s):  
Thermoelectric Properties

Thermoelectric Properties of PbSr(Se,Te)-Based Low Dimensional Structures

2000 ◽  
Vol 626 ◽  
Author(s):  
Harald Beyer ◽  
Joachim Nurnus ◽  
Harald Böttner ◽  
Armin Lambrecht ◽  
Lothar Schmitt ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Power Factor ◽  
Evaluation Method ◽  
Interband Transition ◽  
Multiple Quantum Well ◽  
Calculated Data ◽  
Multiple Quantum ◽  
Ir Transmission ◽  
Low Dimensional

ABSTRACTThermoelectric properties of low dimensional structures based on PbTe/PbSrTe-multiple quantum-well (MQW)-structures with regard to the structural dimensions, doping profiles and levels are presented. Interband transition energies and barrier band-gap are determined from IR-transmission spectra and compared with Kronig-Penney calculations. The influence of the data evaluation method to obtain the 2D power factor will be discussed. The thermoelectrical data of our layers show a more modest enhancement in the power factor σS2 compared with former publications and are in good agreement with calculated data from Broido et al. [5]. The maximum allowed doping level for modulation doped MQW structures is determined. Thermal conductivity measurements show that a ZT enhancement can be achieved by reducing the thermal conductivity due to interface scattering. Additionally promising lead chalcogenide based superlattices for an increased 3D figure of merit are presented.

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