Enhanced thermoelectric performance via carrier energy filtering effect in β-Zn4Sb3 alloy bulk embedded with (Bi2Te3)0.2(Sb2Te3)0.8

2014 ◽  
Vol 115 (5) ◽  
pp. 053710 ◽  
Author(s):  
T. H. Zou ◽  
X. Y. Qin ◽  
D. Li ◽  
B. J. Ren ◽  
G. L. Sun ◽  
...  
Keyword(s):  
Thermoelectric Performance ◽  
Energy Filtering ◽  
Carrier Energy ◽  
Filtering Effect

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.

Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material

2015 ◽  
Vol 08 (06) ◽  
pp. 1550070
Author(s):  
Boyu Zhang ◽  
Jun Wang ◽  
Xinba Yaer ◽  
Zhenzhen Huo ◽  
Yin Wu ◽  
...  
Keyword(s):  
Size Distribution ◽  
Strontium Titanate ◽  
Crystal Size ◽  
Bulk Material ◽  
Crystal Size Distribution ◽  
Thermoelectric Performance ◽  
Potential Barriers ◽  
Seebeck Coefficients ◽  
Energy Filtering ◽  
Filtering Effect

Effect of crystal size distribution on thermoelectric performance of Lanthanum-doped strontium titanate ( La - SrTiO 3) ceramics are investigated in this study. Thermoelectric performance measurement, coupled with microstructure studies, shows that the electrical conductivity strongly depends on the crystal size, potential barrier on the grain boundary and porosity. Meantime, because the average potential barriers height are increased along with the reduction of crystal size, the Seebeck coefficients are increased by energy filtering effect at the large number of grain boundaries. As a result, by controlling of crystal size distribution, ZT value of La - SrTiO 3 is improved.

Thermoelectric all-carbon heterostructures for a flexible thermoelectric generator

2021 ◽  
Vol 5 (1) ◽  
pp. 267-273
Author(s):  
Hyeonseok Hwang ◽  
Kwang-Suk Jang
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Thermoelectric Generator ◽  
Thermoelectric Performance ◽  
Carbon Nanoparticle ◽  
Energy Filtering ◽  
Filtering Effect ◽  
Flexible Thermoelectric

High-performance thermoelectric all-carbon heterostructures are investigated. The carbon nanoparticle barrier between carbon nanotubes can enhance the thermoelectric performance due to the energy filtering effect.

scholarly journals Preparation and Characterization of Thermoelectric PEDOT/Te Nanorod Array Composite Films

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 148
Author(s):  
Hong-Ju Ahn ◽  
Seil Kim ◽  
Kwang Ho Kim ◽  
Joo-Yul Lee
Keyword(s):  
Composite Film ◽  
High Performance ◽  
Electrochemical Polymerization ◽  
Composite Films ◽  
Lithium Perchlorate ◽  
Nanorod Array ◽  
Energy Filtering ◽  
Carrier Energy ◽  
Galvanic Displacement Reaction ◽  
Filtering Effect

In this study, we prepared Te nanorod arrays via a galvanic displacement reaction (GDR) on a Si wafer, and their composite with poly(3,4-ethylenedioxythiophene) (PEDOT) were successfully synthesized by electrochemical polymerization with lithium perchlorate (LiClO4) as a counter ion. The thermoelectric performance of the composite film was optimized by adjusting the polymerization time. As a result, a maximum power factor (PF) of 235 µW/mK2 was obtained from a PEDOT/Te composite film electrochemically polymerized for 15 s at room temperature, which was 11.7 times higher than that of the PEDOT film, corresponding to a Seebeck coefficient (S) of 290 µV/K and electrical conductivity (σ) of 28 S/cm. This outstanding PF was due to the enhanced interface interaction and carrier energy filtering effect at the interfacial potential barrier between the PEDOT and Te nanorods. This study demonstrates that the combination of an inorganic Te nanorod array with electrodeposited PEDOT is a promising strategy for developing high-performance thermoelectric materials.

Nanostructured SnSe integrated with Se quantum dots with ultrahigh power factor and thermoelectric performance from magnetic field-assisted hydrothermal synthesis

2019 ◽  
Vol 7 (26) ◽  
pp. 15757-15765 ◽  
Author(s):  
Rui Xu ◽  
Lulu Huang ◽  
Jian Zhang ◽  
Di Li ◽  
Jizi Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Hydrothermal Synthesis ◽  
Density Of States ◽  
Power Factor ◽  
Thermoelectric Performance ◽  
Energy Filtering ◽  
Filtering Effect ◽  
Nano Grains

Through magnetic field-assisted hydrothermal synthesis, high thermoelectric performance of SnSe is obtained due to Se quantum dots and smaller nano grains, leading to enhanced density of states and energy filtering effect.

Tuning SnSe/SnS hetero-interfaces to enhance thermoelectric performance

2018 ◽  
Vol 11 (04) ◽  
pp. 1850069 ◽  
Author(s):  
Xuerui Liu ◽  
Shuankui Li ◽  
Tinyang Liu ◽  
Weiming Zhu ◽  
Rui Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Multiple Scales ◽  
Phonon Transport ◽  
Thermoelectric Performance ◽  
Energy Filtering ◽  
Promising Strategy ◽  
Filtering Effect ◽  
Heterogeneous Nanostructure

With the development of nanotechnology, thermoelectric materials with complex heterogeneous nanostructure offer a promising approach to improve the thermoelectric performance. In this work, SnSe/SnS hetero-nanosheet was tuned by the epitaxial growth of SnSe on the few layers of SnS nanosheets. The heterojunction interface can optimize the carrier/phonon transport behavior by energy filtering effect and scattering the phonon in multiple scales. Compared with pristine SnSe, the power factor of SnSe/SnS hetero-nanosheet increases from 2.2[Formula: see text][Formula: see text]V/cmK2 to 3.21[Formula: see text][Formula: see text]V/cmK2 at 773[Formula: see text]K, whereas the thermal conductivity decreases significantly from 0.65[Formula: see text]W[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] to 0.48[Formula: see text]W[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] at 773[Formula: see text]K. The maximum ZT of 0.5 is obtained at 773[Formula: see text]K in the SnSe/SnS hetero-nanosheets, which is 89% higher than pristine SnSe. This approach is proved to be a promising strategy to design high performance thermoelectric materials.

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