scholarly journals Chemical Potential Tuning and Enhancement of Thermoelectric Properties in Indium Selenides

Materials ◽  
2015 ◽  
Vol 8 (3) ◽  
pp. 1283-1324 ◽  
Author(s):  
Jong-Soo Rhyee ◽  
Jin Kim
Keyword(s):  
Thermoelectric Properties ◽  
Chemical Potential

Thermoelectric Properties and Chemical Potential Tuning by K- and Se-Coalloying in (Pb0.5Sn0.5)1−xKxTe0.95Se0.05

2019 ◽  
Vol 15 (3) ◽  
pp. 342-349 ◽  
Author(s):  
Dianta Ginting ◽  
Chan-Chieh Lin ◽  
Gareoung Kim ◽  
Song Yi Back ◽  
Bora Won ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Chemical Potential

scholarly journals Enhancing thermoelectric properties of single-walled carbon nanotubes using halide compounds at room temperature and above

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bogumiła Kumanek ◽  
Grzegorz Stando ◽  
Paweł Stando ◽  
Karolina Matuszek ◽  
Karolina Z. Milowska ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Power Factor ◽  
Elevated Temperatures ◽  
Chemical Potential ◽  
Ambient Conditions ◽  
Simple Method ◽  
Promising Solution ◽  
Walled Carbon Nanotubes ◽  
Single Walled Cnts

AbstractCarbon nanotubes (CNTs) are materials with exceptional electrical, thermal, mechanical, and optical properties. Ever since it was demonstrated that they also possess interesting thermoelectric properties, they have been considered a promising solution for thermal energy harvesting. In this study, we present a simple method to enhance their performance. For this purpose, thin films obtained from high-quality single-walled CNTs (SWCNTs) were doped with a spectrum of inorganic and organic halide compounds. We studied how incorporating various halide species affects the electrical conductivity, the Seebeck coefficient, and the Power Factor. Since thermoelectric devices operate under non-ambient conditions, we also evaluated these materials' performance at elevated temperatures. Our research shows that appropriate dopant selection can result in almost fivefold improvement to the Power Factor compared to the pristine material. We also demonstrate that the chemical potential of the starting CNT network determines its properties, which is important for deciphering the true impact of chemical and physical functionalization of such ensembles.

scholarly journals Enhancement of thermoelectric properties over a wide temperature range by lattice disorder and chemical potential tuning in a (CuI)y(Bi2Te3)0.95−x(Bi2Se3)x(Bi2S3)0.05 quaternary system

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4190-4197 ◽  
Author(s):  
Hyunyong Cho ◽  
Song Yi Back ◽  
Jin Hee Kim ◽  
Omkaram Inturu ◽  
Ho Seong Lee ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Wide Temperature Range ◽  
Quaternary System ◽  
Chemical Potential ◽  
Temperature Dependent ◽  
Lattice Disorder ◽  
Temperature Range ◽  
System P

Temperature-dependent ZT values of (CuI)y(Bi2Te3)0.95−x(Bi2Se3)x(Bi2S3)0.05 (x = 0.05, 0.2; y = 0.0, 0.003) compounds compared with other related n-type compounds.

scholarly journals On the Role of Local Many-Body Interactions on the Thermoelectric Properties of Fullerene Junctions

Entropy ◽  
2019 ◽  
Vol 21 (8) ◽  
pp. 754
Author(s):  
Carmine Antonio Perroni ◽  
Vittorio Cataudella
Keyword(s):  
Thermoelectric Properties ◽  
Coulomb Blockade ◽  
Degrees Of Freedom ◽  
Chemical Potential ◽  
Local Electron ◽  
Strong Electron ◽  
Adiabatic Approach ◽  
Many Body Interactions ◽  
Electron Interactions

The role of local electron–vibration and electron–electron interactions on the thermoelectric properties of molecular junctions is theoretically analyzed focusing on devices based on fullerene molecules. A self-consistent adiabatic approach is used in order to obtain a non-perturbative treatment of the electron coupling to low frequency vibrational modes, such as those of the molecule center of mass between metallic leads. The approach also incorporates the effects of strong electron–electron interactions between molecular degrees of freedom within the Coulomb blockade regime. The analysis is based on a one-level model which takes into account the relevant transport level of fullerene and its alignment to the chemical potential of the leads. We demonstrate that only the combined effect of local electron–vibration and electron–electron interactions is able to predict the correct behavior of both the charge conductance and the Seebeck coefficient in very good agreement with available experimental data.

INVESTIGATION OF STRUCTURAL, ELECTRONIC AND THERMOELECTRIC PROPERTIES OF XCUOTE (X: BI, CE, LE) WITH GGA-WC EXCHANGE CORRELATION FUNCTIONAL

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Muhammad Azim Izzuddin Mohd Amin ◽  
R. Ahmed ◽  
A. Shaari ◽  
Bakhtiar Ul-Haq ◽  
Mazmira Mohamad ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Thermoelectric Properties ◽  
Density Functional ◽  
Chemical Potential ◽  
Electronic Conductivity ◽  
Generalized Gradient ◽  
Exchange Correlation ◽  
Semi Empirical ◽  
Linearized Augmented Plane Wave ◽  
Good Agreement

Linearized augmented plane wave plus local orbitals (LAPW + lo) method designed within density functional theory (DFT) has been used in this study to calculate the structural, electronic and thermoelectric properties of XCuOTe (X=Bi, Ce, La). Generalized gradient approximation, Wu-Cohen (GGA-WC) parameterized exchange correlation functional, was used. The structural and electronic calculations have a good agreement with previous study. For thermoelectric calculation, semi empirical Boltzmann approach implemented in BoltzTraP package was used to calculate Seebeck coefficient, electronic conductivity as well as thermal conductivity. By referring to previous studies, the results have good agreement with them. In addition, the Seebeck coefficient of these materials was calculated as a function of the chemical potential at temperatures 300K, 600K, and 900K. Our calculations highlight suitability of these materials for applications in thermoelectric devices.

Electronic Structure of AgPbmSbTem+2 Compounds – Implications on Thermoelectric Properties

2005 ◽  
Vol 886 ◽  
Author(s):  
Khang Hoang ◽  
S. D. Mahanti ◽  
J. Androulakis ◽  
M. G. Kanatzidis
Keyword(s):  
Electronic Structure ◽  
Thermoelectric Properties ◽  
Chemical Potential ◽  
Narrow Band ◽  
Electronic Structure Calculations ◽  
The Other ◽  
Quaternary Compounds ◽  
End Members ◽  
Structure Calculations ◽  
Narrow Band Gap Semiconductors

ABSTRACTNovel quaternary compounds AgPbmSbTem+2 (LAST-m) with different m values have been synthesized recently and some of these compounds show promising thermoelectric properties at high temperatures. The two end members of the series, PbTe (m=∞) and AgSbTe2 (m=0), are also known to be good thermoelectrics. In this paper, we discuss the results of ab initio electronic structure calculations for these two end members and for LAST-2 and LAST-14 to see how the electronic structure near the chemical potential μ evolves with m. Whereas PbTe and LAST-14 are narrow band gap semiconductors, the other two compounds show pseudo-gap structure. Even in the absence of a true gap, the rapidly varying density of states (DOS) near μ may be conducive to large Seebeck coefficient in LAST-2 and AgSbTe2.

Chemical potential and dimensions of chain molecules in athermal environments

1996 ◽  
Vol 89 (6) ◽  
pp. 1733-1754 ◽  
Author(s):  
FERNANDO ESCOBEDO ◽  
JUAN DE PABLO
Keyword(s):  
Chemical Potential ◽  
Chain Molecules
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