scholarly journals Localized double phonon scattering and DOS induced thermoelectric enhancement of degenerate nonstoichiometric Li1−xNbO2 compounds

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53255-53264 ◽  
Author(s):  
Jamil Ur Rahman ◽  
Nguyen Van Du ◽  
Gul Rahman ◽  
V. M. García-Suárez ◽  
Won-Seon Seo ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Significant Role ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Oxide Thermoelectric Material ◽  
P Type

We report the synthesis and thermoelectric properties of a new p-type oxide thermoelectric material (Li1−xNbO2, with x = 0–0.6), in which Li-vacancies play a significant role in the enhancement of the thermoelectric performance.

scholarly journals Boosting the thermoelectric performance of p-type heavily Cu-doped polycrystalline SnSe via inducing intensive crystal imperfections and defect phonon scattering

2018 ◽  
Vol 9 (37) ◽  
pp. 7376-7389 ◽  
Author(s):  
Xiaolei Shi ◽  
Kun Zheng ◽  
Min Hong ◽  
Weidi Liu ◽  
Raza Moshwan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Solvothermal Route ◽  
Crystal Imperfections ◽  
P Type ◽  
First Time

In this study, we, for the first time, report a high Cu solubility of 11.8% in single crystal SnSe microbelts synthesized via a facile solvothermal route.

High thermoelectric performance from optimization of hole-doped CuInTe2

2016 ◽  
Vol 18 (8) ◽  
pp. 5925-5931 ◽  
Author(s):  
Gang Zhou ◽  
Dong Wang
Keyword(s):  
Thermoelectric Material ◽  
Thermoelectric Performance ◽  
P Type

p-Type CuInTe2 is predicted to be a promising thermoelectric material at medium temperatures by optimization of doping at the In-site.

High thermoelectric performance of n-type Bi2Te2.7Se0.3via nanostructure engineering

2018 ◽  
Vol 6 (20) ◽  
pp. 9642-9649 ◽  
Author(s):  
D. Li ◽  
J. M. Li ◽  
J. C. Li ◽  
Y. S. Wang ◽  
J. Zhang ◽  
...  
Keyword(s):  
Thermoelectric Material ◽  
Room Temperature ◽  
Thermoelectric Performance ◽  
Commercial Applications ◽  
P Type

BiSbTe has been realized as an ideal p-type thermoelectric material near room temperature; however, its commercial applications are largely restricted by its n-type counterpart that exhibits relatively inferior thermoelectric performance.

Remarkably high thermoelectric performance of Cu2−xLixSe bulks with nanopores

2018 ◽  
Vol 6 (46) ◽  
pp. 23417-23424 ◽  
Author(s):  
Qiujun Hu ◽  
Zheng Zhu ◽  
Yuewen Zhang ◽  
Xin-Jian Li ◽  
Hongzhang Song ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Practical Applications ◽  
P Type

Cu2Se is a p-type semiconducting compound that possesses excellent thermoelectric properties which exhibit great potential for practical applications.

scholarly journals Higher thermoelectric performance of Zintl phases (Eu0.5Yb0.5)1−xCaxMg2Bi2 by band engineering and strain fluctuation

2016 ◽  
Vol 113 (29) ◽  
pp. E4125-E4132 ◽  
Author(s):  
Jing Shuai ◽  
Huiyuan Geng ◽  
Yucheng Lan ◽  
Zhuan Zhu ◽  
Chao Wang ◽  
...  
Keyword(s):  
Density Functional ◽  
Phonon Scattering ◽  
Theoretical Calculations ◽  
Thermoelectric Performance ◽  
Partial Substitution ◽  
Zintl Phases ◽  
Band Engineering ◽  
Transmission Electron ◽  
P Type ◽  
Callaway Model

Complex Zintl phases, especially antimony (Sb)-based YbZn0.4Cd1.6Sb2 with figure-of-merit (ZT) of ∼1.2 at 700 K, are good candidates as thermoelectric materials because of their intrinsic “electron–crystal, phonon–glass” nature. Here, we report the rarely studied p-type bismuth (Bi)-based Zintl phases (Ca,Yb,Eu)Mg2Bi2 with a record thermoelectric performance. Phase-pure EuMg2Bi2 is successfully prepared with suppressed bipolar effect to reach ZT ∼ 1. Further partial substitution of Eu by Ca and Yb enhanced ZT to ∼1.3 for Eu0.2Yb0.2Ca0.6Mg2Bi2 at 873 K. Density-functional theory (DFT) simulation indicates the alloying has no effect on the valence band, but does affect the conduction band. Such band engineering results in good p-type thermoelectric properties with high carrier mobility. Using transmission electron microscopy, various types of strains are observed and are believed to be due to atomic mass and size fluctuations. Point defects, strain, dislocations, and nanostructures jointly contribute to phonon scattering, confirmed by the semiclassical theoretical calculations based on a modified Debye–Callaway model of lattice thermal conductivity. This work indicates Bi-based (Ca,Yb,Eu)Mg2Bi2 is better than the Sb-based Zintl phases.

Thermoelectric Properties on SixGe1-x Containing Fullerite

2007 ◽  
Vol 280-283 ◽  
pp. 409-412 ◽  
Author(s):  
Gui Ying Xu ◽  
Xiao Feng Wu ◽  
Li Li Zhang ◽  
Chang Chun Ge
Keyword(s):  
Quantum Dot ◽  
Thermoelectric Property ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Analytical Method ◽  
Hot Pressing ◽  
Thermoelectric Generator ◽  
Pressing Method ◽  
Higher Temperature ◽  
P Type

SixGe1-x (x = 0.75 for n-type and 0.7 for p-type) is a typical thermoelectric material used at higher temperature as thermoelectric generator. Its property is dependent on the composition. SixGe1-x containing different amount of fullerite added as hollow quantum dot were fabricated by hot-pressing method. The relations among thermoelectric property, the amount of fullerite and the microstructure were investigated by normal measurement and analytical method.

The effect of doping on thermoelectric performance of p-type SnSe: Promising thermoelectric material

2016 ◽  
Vol 668 ◽  
pp. 152-158 ◽  
Author(s):  
Niraj Kumar Singh ◽  
Sivaiah Bathula ◽  
Bhasker Gahtori ◽  
Kriti Tyagi ◽  
D. Haranath ◽  
...  
Keyword(s):  
Thermoelectric Material ◽  
Thermoelectric Performance ◽  
P Type ◽  
Effect Of Doping

Lattice Deformation-Induced Enhancement in Thermoelectric Properties of p-Type Bismuth Telluride-Based Alloys

2021 ◽  
Vol 13 (7) ◽  
pp. 1358-1363
Author(s):  
Min Soo Park ◽  
Gook-Hyun Ha ◽  
Yong Ho Park ◽  
Hye Young Koo
Keyword(s):  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Phonon Scattering ◽  
Thermoelectric Device ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Thermal And Electrical Properties ◽  
P Type ◽  
Short Time ◽  
Sintering Method

ABSTRACTThe properties of a thermoelectric device depend on the thermoelectric material. Bi-Te-based thermoelectric materials consist of p-type and n-type semiconductors are characterized by an excellent dimensionless figure of merit (ZT). In this study, we investigated the effect of the Bi/Sb compositional ratio on the thermoelectric properties in p-type Bi–Sb–Te alloys. Bi–Sb–Te powders were prepared by melting-grinding process. The sintered bodies were fabricated by the spark plasma sintering method, which allows short time sintering for controlling the growth of particles. By controlling the Bi/Sb ratio, the carrier concentration could be optimized. An increase in the Bi concentration led to a decrease in the carrier concentration and thermal conductivity, whereas the See-beck coefficient and specific resistance were increased due to phonon scattering. The thermoelectric ZT value was found to be dependent on changes in the thermal and electrical properties. The best carrier concentration value (2.46 x 1019/cm2) and the highest ZT value (1.3) were achieved for x = 0.4 in BixSb2−xTe3.

Ca-doped HoCoO3 as p-type oxide thermoelectric material

2001 ◽  
Vol 48 (3-4) ◽  
pp. 225-229 ◽  
Author(s):  
Ji-Woong Moon ◽  
Yoshitake Masuda ◽  
Won-Seon Seo ◽  
Kunihito Koumoto
Keyword(s):  
Thermoelectric Material ◽  
Oxide Thermoelectric Material ◽  
P Type
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