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

scholarly journals Carrier density control and enhanced thermoelectric performance of Bi and Cu co-doped GeTe

APL Materials ◽  
2017 ◽  
Vol 5 (5) ◽  
pp. 056103 ◽  
Author(s):  
S. Shimano ◽  
Y. Tokura ◽  
Y. Taguchi
Keyword(s):  
Carrier Density ◽  
Thermoelectric Performance ◽  
Density Control ◽  
Co Doped

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

Carrier density control in Cu2HgGeTe4and discovery of Hg2GeTe4viaphase boundary mapping

2019 ◽  
Vol 7 (2) ◽  
pp. 621-631 ◽  
Author(s):  
Brenden R. Ortiz ◽  
Kiarash Gordiz ◽  
Lídia C. Gomes ◽  
Tara Braden ◽  
Jesse M. Adamczyk ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Carrier Density ◽  
Density Control ◽  
Boundary Mapping

Phase boundary mapping in Cu2HgGeTe4allows discovery of Hg2GeTe4and further enables carrier density control over 4 orders of magnitude.

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.

Carrier density control of Bi-2212 whiskers

2002 ◽  
Vol 372-376 ◽  
pp. 335-338 ◽  
Author(s):  
K Inomata ◽  
T Kawae ◽  
S.-J Kim ◽  
K Nakajima ◽  
T Yamashita ◽  
...  
Keyword(s):  
Carrier Density ◽  
Density Control

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.

Improving Thermoelectric Performance of α-MgAgSb by Theoretical Band Engineering Design

2017 ◽  
Vol 7 (18) ◽  
pp. 1700076 ◽  
Author(s):  
Xiaojian Tan ◽  
Ling Wang ◽  
Hezhu Shao ◽  
Song Yue ◽  
Jingtao Xu ◽  
...  
Keyword(s):  
Engineering Design ◽  
Thermoelectric Performance ◽  
Band Engineering
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