scholarly journals Strain-induced enhancement in the thermoelectric performance of a ZrS2monolayer

2016 ◽  
Vol 4 (20) ◽  
pp. 4538-4545 ◽  
Author(s):  
H. Y. Lv ◽  
W. J. Lu ◽  
D. F. Shao ◽  
H. Y. Lu ◽  
Y. P. Sun
Keyword(s):  
Thermal Conductivity ◽  
Seebeck Coefficient ◽  
Tensile Strain ◽  
Thermoelectric Performance ◽  
Simultaneous Increase ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

The thermoelectric performance of the ZrS2monolayer is greatly enhanced by the biaxial tensile strain, due to the simultaneous increase of the Seebeck coefficient and decrease of the thermal conductivity.

Effects of biaxial tensile strain on the first-principles-driven thermal conductivity of buckled arsenene and phosphorene

2018 ◽  
Vol 20 (43) ◽  
pp. 27611-27620 ◽  
Author(s):  
Armin Taheri ◽  
Carlos Da Silva ◽  
Cristina H. Amon
Keyword(s):  
Thermal Conductivity ◽  
First Principles ◽  
Tensile Strain ◽  
2D Materials ◽  
Two Dimensional ◽  
First Principles Study ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain ◽  
Phonon Properties

A first-principles study is conducted to investigate the effect of biaxial tensile strain on phonon properties and thermal conductivity of buckled phosphorene and arsenene, novel two-dimensional (2D) materials of group-VA.

scholarly journals Biaxial Tensile Strain-Induced Enhancement of Thermoelectric Efficiency of α-Phase Se2Te and SeTe2 Monolayers

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 40
Author(s):  
Shao-Bo Chen ◽  
Gang Liu ◽  
Wan-Jun Yan ◽  
Cui-E Hu ◽  
Xiang-Rong Chen ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Density Functional ◽  
Tensile Strain ◽  
Lattice Thermal Conductivity ◽  
Waste Heat ◽  
Electronic Conductivity ◽  
Thermoelectric Efficiency ◽  
Α Phase ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

Thermoelectric (TE) materials can convert waste heat into electrical energy, which has attracted great interest in recent years. In this paper, the effect of biaxial-tensile strain on the electronic properties, lattice thermal conductivity, and thermoelectric performance of α-phase Se2Te and SeTe2 monolayers are calculated based on density-functional theory and the semiclassical Boltzmann theory. The calculated results show that the tensile strain reduces the bandgap because the bond length between atoms enlarges. Moreover, the tensile strain strengthens the scatting rate while it weakens the group velocity and softens the phonon model, leading to lower lattice thermal conductivity kl. Simultaneously, combined with the weakened kl, the tensile strain can also effectively modulate the electronic transport coefficients, such as the electronic conductivity, Seebeck coefficient, and electronic thermal conductivity, to greatly enhance the ZT value. In particular, the maximum n-type doping ZT under 1% and 3% strain increases up to six and five times higher than the corresponding ZT without strain for the Se2Te and SeTe2 monolayers, respectively. Our calculations indicated that the tensile strain can effectively enhance the thermoelectric efficiency of Se2Te and SeTe2 monolayers and they have great potential as TE materials.

The effect of biaxial tensile strain on structure and photoelectric properties of Fe-doped GaN monolayer

2021 ◽  
Vol 197 ◽  
pp. 110644
Author(s):  
Juan Song ◽  
Zhao Ding ◽  
Xue-Fei Liu ◽  
Ze-Chen Huang ◽  
Jia-Wei Li ◽  
...  
Keyword(s):  
Tensile Strain ◽  
Photoelectric Properties ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

scholarly journals Enhanced thermoelectric performance of Bi–Sb–Te/Sb2O3 nanocomposites by energy filtering effect

2018 ◽  
Vol 6 (43) ◽  
pp. 21341-21349 ◽  
Author(s):  
Amir Pakdel ◽  
Quansheng Guo ◽  
Valeria Nicolosi ◽  
Takao Mori
Keyword(s):  
Thermal Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Performance ◽  
Energy Filtering ◽  
Filtering Effect

24 month high-ZT stability of Bi0.5Sb1.5Te3/Sb2O3 nanocomposites that demonstrate simultaneous Seebeck coefficient enhancement and thermal conductivity decline through energy filtering effect.

scholarly journals Tunable Dirac cones in two-dimensional covalent organic materials: C2N6S3 and its analogs

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 52065-52070 ◽  
Author(s):  
Lin Wei ◽  
Xiaoming Zhang ◽  
Xiaobiao Liu ◽  
Hongcai Zhou ◽  
Bo Yang ◽  
...  
Keyword(s):  
Tensile Strain ◽  
Organic Materials ◽  
Fermi Velocity ◽  
Two Dimensional ◽  
Biaxial Strain ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

C2N6S3 sustains a biaxial tensile strain up to 24% and its Fermi velocity can be tuned by biaxial strain.

Thermoelectric Performance of Glass Microsphere Dispersed Bi-Sb Composites at Low Temperature

2013 ◽  
Vol 743-744 ◽  
pp. 120-125
Author(s):  
Zhen Chen ◽  
Ye Mao Han ◽  
Min Zhou ◽  
Rong Jin Huang ◽  
Yuan Zhou ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Materials ◽  
Sem Analysis ◽  
Glass Microsphere ◽  
Thermoelectric Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Measurement Results

In the present study, the glass microsphere dispersed Bi-Sb thermoelectric materials have been fabricated through mechanical alloying followed by pressureless sintering. The phase composition and the microstructure were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. Electrical conductivity, Seebeck coefficient and thermal conductivity were measured in the temperature range of 77~300 K. The ZT values were calculated according to the measurement results. The results showed that the electrical conductivity, Seebeck coefficient and thermal conductivity decreased by adding glass microsphere into Bi-Sb thermoelectric materials. However, the optimum ZT value of 0.24 was obtained at 260 K, which was increased 10% than that of the Bi-Sb matrix. So it is confirmed that the thermoelectric performance of Bi-Sb-based materials can be improved by adding moderate glass microspheres.

scholarly journals Direct and indirect band gaps in Ge under biaxial tensile strain investigated by photoluminescence and photoreflectance studies

2018 ◽  
Vol 97 (19) ◽  
Author(s):  
D. Saladukha ◽  
M. B. Clavel ◽  
F. Murphy-Armando ◽  
G. Greene-Diniz ◽  
M. Grüning ◽  
...  
Keyword(s):  
Tensile Strain ◽  
Band Gaps ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

Biaxial strain effect on the electronic structure and valleytronic properties of a MoS2/CoO(111) heterostructure

2019 ◽  
Vol 21 (27) ◽  
pp. 15151-15156 ◽  
Author(s):  
Guang Yang ◽  
Jia Li ◽  
Ze Liu ◽  
Congcong Li ◽  
Xiujuan Mao
Keyword(s):  
Electronic Structure ◽  
Tensile Strain ◽  
Spin Splitting ◽  
Strain Effect ◽  
Biaxial Strain ◽  
Berry Curvature ◽  
Valley Splitting ◽  
Biaxial Tensile ◽  
Biaxial Tensile Strain

Spin splitting, valley splitting and Berry curvature at the K and K′ valleys of a MoS2/CoO(111) heterostructure can be tuned continually by biaxial tensile strain.

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