Boosting the thermoelectric performance of Fe2VAl−type Heusler compounds by band engineering

2021 ◽  
Vol 103 (8) ◽  
Author(s):  
F. Garmroudi ◽  
A. Riss ◽  
M. Parzer ◽  
N. Reumann ◽  
H. Müller ◽  
...  
Keyword(s):  
Thermoelectric Performance ◽  
Heusler Compounds ◽  
Band Engineering

Rational band engineering and structural manipulations inducing high thermoelectric performance in n-type CoSb3 thin films

Nano Energy ◽  
2021 ◽  
Vol 81 ◽  
pp. 105683
Author(s):  
Zhuang-Hao Zheng ◽  
Xiao-Lei Shi ◽  
Dong-Wei Ao ◽  
Wei-Di Liu ◽  
Yue-Xing Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermoelectric Performance ◽  
Band Engineering

scholarly journals A high throughput search for efficient thermoelectric half-Heusler compounds

2020 ◽  
Vol 8 (47) ◽  
pp. 25187-25197
Author(s):  
Parul R. Raghuvanshi ◽  
Suman Mondal ◽  
Amrita Bhattacharya
Keyword(s):  
High Throughput ◽  
Thermoelectric Performance ◽  
Heusler Compounds

Enhancing the thermoelectric performance of half Heusler through isovalent compositional tailoring.

scholarly journals Band engineering, carrier density control, and enhanced thermoelectric performance in multi-doped SnTe

APL Materials ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 091107 ◽  
Author(s):  
A. Doi ◽  
S. Shimano ◽  
D. Inoue ◽  
T. Kikitsu ◽  
T. Hirai ◽  
...  
Keyword(s):  
Carrier Density ◽  
Thermoelectric Performance ◽  
Band Engineering ◽  
Density Control

Band engineering via biaxial strain for enhanced thermoelectric performance in stannite-type Cu2ZnSnSe4

RSC Advances ◽  
2015 ◽  
Vol 5 (32) ◽  
pp. 24908-24914 ◽  
Author(s):  
Daifeng Zou ◽  
Guozheng Nie ◽  
Yu Li ◽  
Ying Xu ◽  
Jianguo Lin ◽  
...  
Keyword(s):  
Fermi Level ◽  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Biaxial Strain ◽  
Band Engineering ◽  
Valence Bands

The enhancement of the thermoelectric properties of stannite-type Cu2ZnSnSe4 under biaxial strain can be ascribed to band convergence of the valence bands near the Fermi level.

Fine tuning of thermoelectric performance in phase-separated half-Heusler compounds

2015 ◽  
Vol 3 (40) ◽  
pp. 10409-10414 ◽  
Author(s):  
Elisabeth Rausch ◽  
Benjamin Balke ◽  
Jana Marie Stahlhofen ◽  
Siham Ouardi ◽  
Ulrich Burkhardt ◽  
...  
Keyword(s):  
Fine Tuning ◽  
Thermoelectric Performance ◽  
Heusler Compounds ◽  
P Type

An efficiently designed microstructure leads to a record ZT value in p-type half-Heusler compounds.

Band engineering of high performance p-type FeNbSb based half-Heusler thermoelectric materials for figure of merit zT > 1

2015 ◽  
Vol 8 (1) ◽  
pp. 216-220 ◽  
Author(s):  
Chenguang Fu ◽  
Tiejun Zhu ◽  
Yintu Liu ◽  
Hanhui Xie ◽  
Xinbing Zhao
Keyword(s):  
Thermoelectric Materials ◽  
High Performance ◽  
Figure Of Merit ◽  
Heusler Compounds ◽  
Band Engineering ◽  
Engineering Approach ◽  
P Type

High performance p-type half-Heusler compounds FeNb1−xTixSb are developed via a band engineering approach and a record zT of 1.1 is achieved.

High Band Degeneracy Contributes to High Thermoelectric Performance in p-Type Half-Heusler Compounds

2014 ◽  
Vol 4 (18) ◽  
pp. 1400600 ◽  
Author(s):  
Chenguang Fu ◽  
Tiejun Zhu ◽  
Yanzhong Pei ◽  
Hanhui Xie ◽  
Heng Wang ◽  
...  
Keyword(s):  
Thermoelectric Performance ◽  
Heusler Compounds ◽  
P Type ◽  
High Band

Realizing both n- and p-types of high thermoelectric performance in Fe1−xNixTiSb half-Heusler compounds

2020 ◽  
Vol 8 (9) ◽  
pp. 3156-3164
Author(s):  
Nanhai Li ◽  
Huaxing Zhu ◽  
Wenlu He ◽  
Bing Zhang ◽  
Wenjun Cui ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Random Distribution ◽  
Lattice Thermal Conductivity ◽  
Thermoelectric Performance ◽  
Heusler Compounds ◽  
Quality Factors ◽  
High Quality

The random distribution of Fe/Ni atoms in Fe1−xNixTiSb, which leads to low lattice thermal conductivity and thus high quality factors.

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.

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