scholarly journals Quantum Theory of Thermoelectric Power (Seebeck Coefficient)

10.5772/30498 ◽  
2011 ◽  
Author(s):  
Shigeji Fujita ◽  
Akira Suzuki
Keyword(s):  
Quantum Theory ◽  
Seebeck Coefficient ◽  
Thermoelectric Power

scholarly journals Preparation of InSe Thin Films by Thermal Evaporation Method and Their Characterization: Structural, Optical, and Thermoelectrical Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Sarita Boolchandani ◽  
Subodh Srivastava ◽  
Y. K. Vijay
Keyword(s):  
Thin Films ◽  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Temperature Variation ◽  
Thermal Evaporation ◽  
Low Cost ◽  
High Vacuum ◽  
Power Measurement ◽  
Thermal Evaporation Method ◽  
Evaporation Method

The indium selenium (InSe) bilayer thin films of various thickness ratios, InxSe(1-x) (x = 0.25, 0.50, 0.75), were deposited on a glass substrate keeping overall the same thickness of 2500 Ǻ using thermal evaporation method under high vacuum atmosphere. Electrical, optical, and structural properties of these bilayer thin films have been compared before and after thermal annealing at different temperatures. The structural and morphological characterization was done using XRD and SEM, respectively. The optical bandgap of these thin films has been calculated by Tauc’s relation that varies within the range of 1.99 to 2.05 eV. A simple low-cost thermoelectrical power measurement setup is designed which can measure the Seebeck coefficient “S” in the vacuum with temperature variation. The setup temperature variation is up to 70°C. This setup contains a Peltier device TEC1-12715 which is kept between two copper plates that act as a reference metal. Also, in the present work, the thermoelectric power of indium selenide (InSe) and aluminum selenide (AlSe) bilayer thin films prepared and annealed in the same way is calculated. The thermoelectric power has been measured by estimating the Seebeck coefficient for InSe and AlSe bilayer thin films. It was observed that the Seebeck coefficient is negative for InSe and AlSe thin films.

Thermoelectric Power of the Liquid Tin-Lead Eutectic Alloy

1980 ◽  
Vol 35 (6) ◽  
pp. 647-648
Author(s):  
D. H. Kurlat ◽  
D. Zadunaisky de Bäsch ◽  
M. Rosen
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Liquid Alloy ◽  
Eutectic Alloy ◽  
Temperature Range ◽  
Ziman Theory ◽  
Liquid Tin

We have measured the Seebeck coefficient of the Sn0.74- Pb0.26 liquid alloy, in the temperature range 190° C- 700° C. The results were compared with those predicted by the Faber-Ziman theory

scholarly journals Paper 1: “Cement as a Thermoelectric Material,” [J. Mater. Res. 15, 2844-2848 (2000)] And Paper 2: “Rectifying and Thermocouple Junctions Based on Portland Cement,” J. Mater. Res. 16, 1989-1993 (2001)]

2004 ◽  
Vol 19 (4) ◽  
pp. 1294-1294 ◽  
Author(s):  
Sihai Wen ◽  
D.D.L. Chung
Keyword(s):  
Portland Cement ◽  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Carbon Fibers ◽  
Thermoelectric Material ◽  
Steel Fibers ◽  
Cement Pastes ◽  
The Absolute ◽  
P Type ◽  
Wrong Sign

In the two papers listed above, the conversion of the Seebeck coefficient (relative to copper) to the absolute thermoelectric power was done by using the wrong sign of the absolute thermoelectric power of copper (2.34 μV/°C). The corrected tables are shown below for both papers. The correction means that plain cement paste is slightly p-type rather than slightly n-type. In addition, it means that cement pastes with carbon fibers are more p-type and those with steel fibers are less n-type than reported. Note in Table III of Paper 2 that all cement pastes are p-type except for paste (ii). Note in Table IV of Paper 2 that all cement junctions are pn-junctions (rather than some being nn+-junctions).

Synthesis and Thermoelectric Studies in Cr Doped Cobalt Ferrites Nano Particles

2012 ◽  
Vol 510-511 ◽  
pp. 171-176 ◽  
Author(s):  
M. Anis-ur-Rehman ◽  
Mariam Ansari ◽  
Zeb Un Nisa Mughal ◽  
M.S. Awan ◽  
Ashari Maqsood
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Room Temperature ◽  
Nano Particles ◽  
Power Measurement ◽  
Cobalt Ferrites ◽  
Before And After ◽  
Crystallite Sizes ◽  
Xrd Patterns ◽  
Co Precipitation

Samples of Cr doped cobalt ferrite were prepared by co-precipitation route. These particles were characterized by X-ray diffraction (XRD) at room temperature. The structural properties were observed before and after sintering. The FCC spinel structure was confirmed by XRD patterns of the samples. The crystallite sizes lie in the range of 37-60 nm. DC electrical properties as a function composition were measured. Scanning electron microscopy was used in order to investigate the surface morphology of the prepared samples. The system for thermoelectric power measurement was designed, developed and calibrated in the laboratory. The room temperature thermoelectric power was measured for the prepared samples. The magnitude of Seebeck coefficient depends on the composition and resistivity of the samples. The obtained values of Seebeck coefficient for CoFe2O4are in good agreement to the reported values. Determined values of Seebeck coefficient for other studied compositions are an addition to the literature.

Design and evaluation of n-type Si1-xGex as a thermoelectric-conversion material

2007 ◽  
Vol 1044 ◽  
Author(s):  
Tomohiro Imai ◽  
Tsutomu Iida ◽  
Yuki Miyata ◽  
Takashi Itoh ◽  
Hiroki Funashima ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Electronic Band Structure ◽  
Local Density ◽  
Band Structure Calculation ◽  
Full Potential ◽  
Electronic Band ◽  
Thermoelectric Conversion ◽  
High Seebeck Coefficient ◽  
Flapw Method

AbstractSi1-xGex alloys show the high power generating efficiency as a thermoelectric- conversion material. We evaluate the thermoelectric power of the n-type SiGe system on the basis of the first principles calculations. The electronic-band-structure calculation is performed using all-electron full-potential linearized augmented-plane-wave (FLAPW) method within the local density approximation (LDA). The Seebeck coefficient is analyzed by the Bloch-Boltzmann equation. We find that the ordered rhombohedral SiGe has high Seebeck coefficient in comparison with zincblende SiGe. The efficiency of the thermoelectric power in Si1-xGex is gained by the local atomic configuration rather than the Ge concentration.

scholarly journals Influence of crystallinity on the thermoelectric power factor of P3HT vapour-doped with F4TCNQ

RSC Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 1593-1599 ◽  
Author(s):  
Jonna Hynynen ◽  
David Kiefer ◽  
Christian Müller
Keyword(s):  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Thermoelectric Power Factor ◽  
Order Of Magnitude

The crystallinity of P3HT strongly benefits the electrical conductivity but not Seebeck coefficient, leading to an increase in power factor by one order of magnitude.

PHONON-DRAG EFFECT OF ULTRA-THIN FeSi2 AND MnSi1.7/FeSi2 FILMS

2011 ◽  
Vol 25 (22) ◽  
pp. 1829-1838 ◽  
Author(s):  
Q. R. HOU ◽  
B. F. GU ◽  
Y. B. CHEN ◽  
Y. J. HE
Keyword(s):  
Electrical Resistivity ◽  
Seebeck Coefficient ◽  
Single Crystals ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Low Temperatures ◽  
Room Temperature ◽  
Phonon Drag ◽  
Drag Effect ◽  
Thermoelectric Power Factor

Phonon-drag effect usually occurs in single crystals at very low temperatures (10–200 K). Strong phonon-drag effect is observed in ultra-thin β- FeSi 2 films at around room temperature. The Seebeck coefficient of a 23 nm-thick β- FeSi 2 film can reach -1.375 mV/K at 343 K. However, the thermoelectric power factor of the film is still small, only 0.42×10-3 W/m-K2, due to its large electrical resistivity. When a 27 nm-thick MnSi 1.7 film with low electrical resistivity is grown on it, the thermoelectric power factor of the MnSi 1.7 film can reach 1.5×10-3 W/m-K2 at around room temperature. This value is larger than that of bulk MnSi 1.7 material in the same temperature range.

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