Realizing High Thermoelectric Performance in p-Type SnSe through Crystal Structure Modification

2018 ◽  
Vol 141 (2) ◽  
pp. 1141-1149 ◽  
Author(s):  
Bingchao Qin ◽  
Dongyang Wang ◽  
Wenke He ◽  
Yang Zhang ◽  
Haijun Wu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermoelectric Performance ◽  
Structure Modification ◽  
P Type

The Effect of Rh and Sr Substitution on the Thermoelectric Performance of LaCoO3

2010 ◽  
Vol 1267 ◽  
Author(s):  
Kyei-Sing Kwong ◽  
Andrew E Smith ◽  
Mas Subramanian
Keyword(s):  
Crystal Structure ◽  
Seebeck Coefficient ◽  
Figure Of Merit ◽  
Thermoelectric Performance ◽  
Component System ◽  
Temperature Range ◽  
Seebeck Coefficients ◽  
Lower Temperature Range ◽  
Lower Temperature ◽  
P Type

AbstractA series of LaCo1-xRhxO3 (x=0-1) samples and La1-ySryCo1-xRhxO3 (y = 0.05, 0.15 and x = 0.1-0.3) samples were prepared to study the effect of Rh substituion for Co in the four component system and Sr substitution for La in the five component system on the crystal structure and thermoelectric performance of the LaCoO3. At Rh substitution for Co of x=0.2 greater, the crystal structure shifts from rhombohederal (LaCoO3) to orthorhombic (LaRhO3). Thermoelectric evaluation revealed that Rh doped samples (0.3 <x <1) show large positive seebeck coefficients indicating a P-type conduction in the temperature range of the tests (273 to 775K). Rh substitution for Co decreases thermal conductivity, increases Seebeck coefficient and consequently increases the theroelectric figure of merit ZT. Sr substitution for La increases thermal and electrical conductivity and consquenently negligiblely decreases the seebeck coefficient. A thermoelectric figure-of-merit (ZT) around 0.075 has been achieved for LaCo0.5Rh0.5O3 at 775 K, and is expected to be above 0.1 at 1000 K. Sr substitution improved the TE properties throughout the lower temperature range with a ZT =0.045 observed for La0.95Sr0.05Co0.9Rh0.1O3 at 425 K and ZT = 0.05 for La0.85Sr0.15Co0.5Rh0.5O3 at 775 K. These findings provide new insight into thermoelectric perovskite oxides containing rhodium and strontium.

Cobalt-doping in Cu2SnS3: enhanced thermoelectric performance by synergy of phase transition and band structure modification

2017 ◽  
Vol 5 (44) ◽  
pp. 23267-23275 ◽  
Author(s):  
Huiwen Zhao ◽  
Xiaoxuan Xu ◽  
Chao Li ◽  
Ruoming Tian ◽  
Ruizhi Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Band Structure ◽  
Thermoelectric Material ◽  
Thermoelectric Performance ◽  
Cobalt Doping ◽  
Structure Modification ◽  
Ternary Sulfide ◽  
P Type

Mohite-type ternary sulfide Cu2SnS3, which has been intensively studied in the photovoltaic field, has recently attracted much attention as an outstanding p-type eco-friendly thermoelectric material.

Structural, Thermal and Electrical Properties of Doped Poly(3,4 ethylenedioxythiophene)

2016 ◽  
Vol 10 (4) ◽  
pp. 395-400 ◽  
Author(s):  
Deepali Kelkar ◽  
◽  
Ashish Chourasia ◽  
◽  
Keyword(s):  
Crystal Structure ◽  
Electrical Properties ◽  
Xrd Analysis ◽  
Structure Modification ◽  
Camphorsulfonic Acid ◽  
Thermal And Electrical Properties ◽  
Ft Ir

Poly(3,4-ethylenedioxythiophene) (PEDOT) was chemically synthesized, undoped and then re-doped using FeCl3 as well as camphorsulfonic acid (CSA). FT-IR results confirm the nature of the synthesized and doped samples. XRD analysis indicates crystal structure modification after doping and was also used to calculate crystallinity of samples. Crystallinity increases after FeCl3 doping, whereas it reduces due to CSA doping. TGA-DTA results show reduction in Tg value for FeCl3 doped sample while it increases for CSA doped samples compared to that of undoped PEDOT. Reduction in Tg indicates plasticizing effect of FeCl3 whereas increase in Tg show anti-plasticizing effect of CSA in PEDOT. Conductivity value () increases by two orders of magnitude after doping. Log vs. 1/T graph show metallic nature of undoped PEDOT above 308 K, however both doped samples show semiconducting nature from 301 to 383 K.

Origins of the enhanced thermoelectric performance for p-type Ge1-xPbxTe alloys

2020 ◽  
Vol 596 ◽  
pp. 412397 ◽  
Author(s):  
T. Parashchuk ◽  
A. Shabaldin ◽  
O. Cherniushok ◽  
P. Konstantinov ◽  
I. Horichok ◽  
...  
Keyword(s):  
Thermoelectric Performance ◽  
P Type

scholarly journals Study of anisotropic thermal conductivity in textured thermoelectric alloys by Raman spectroscopy

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24456-24465
Author(s):  
Rapaka S. C. Bose ◽  
K. Ramesh
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Raman Spectroscopy ◽  
Transport Properties ◽  
Thermal Transport ◽  
Layered Crystal ◽  
Layered Crystal Structure ◽  
Thermal Transport Properties ◽  
Anisotropic Thermal Conductivity ◽  
P Type

Polycrystalline p-type Sb1.5Bi0.5Te3 (SBT) and n-type Bi2Te2.7Se0.3 (BTS) compounds possessing layered crystal structure show anisotropic electronic and thermal transport properties.

Use of EXAFS- and optical spectroscopy for analysis of NaCl-Ni,Cu crystal structure modification resulting from X-irradiation

2001 ◽  
Author(s):  
Vyacheslav I. Kochubey ◽  
Yuliya G. Konyukhova ◽  
Konsuella E. Gyunsburg ◽  
Tatyana A. Bashkatova ◽  
Nina P. Zvezdova
Keyword(s):  
Crystal Structure ◽  
Optical Spectroscopy ◽  
Structure Modification ◽  
X Irradiation

High Thermoelectric Performance of p-Type PbTe Enabled by the Synergy of Resonance Scattering and Lattice Softening

2021 ◽  
Author(s):  
Taras Parashchuk ◽  
Bartlomiej Wiendlocha ◽  
Oleksandr Cherniushok ◽  
Rafal Knura ◽  
Krzysztof T. Wojciechowski
Keyword(s):  
Resonance Scattering ◽  
Thermoelectric Performance ◽  
P Type ◽  
Lattice Softening
Sign in / Sign up

Export Citation Format

Share Document