scholarly journals Tailoring the structure and thermoelectric properties of BaTiO3via Eu2+ substitution

2017 ◽  
Vol 19 (21) ◽  
pp. 13469-13480 ◽  
Author(s):  
Xingxing Xiao ◽  
Marc Widenmeyer ◽  
Wenjie Xie ◽  
Tianhua Zou ◽  
Songhak Yoon ◽  
...  
Keyword(s):  
Transport Properties ◽  
Valence Band ◽  
Thermoelectric Properties ◽  
Electrical Transport ◽  
Electrical Transport Properties

The presence of filled Eu2+ 4f states at the top of the valence band significantly affect the electrical transport properties of Ba1−xEuxTiO3−δ compounds.

scholarly journals Outstanding thermoelectric properties of solvothermal-synthesized Sn1−3xInxAg2xTe micro-crystals through defect engineering and band tuning

2020 ◽  
Vol 8 (7) ◽  
pp. 3978-3987 ◽  
Author(s):  
Raza Moshwan ◽  
Wei-Di Liu ◽  
Xiao-Lei Shi ◽  
Qiang Sun ◽  
Han Gao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Transport Properties ◽  
Valence Band ◽  
Thermoelectric Properties ◽  
Electrical Transport ◽  
Energy Levels ◽  
Resonance Energy ◽  
Defect Engineering ◽  
Electrical Transport Properties ◽  
Co Doping

In eco-friendly SnTe thermoelectrics, In and Ag co-doping induces the synergistic effect of resonance energy levels and valence band convergence to enhance its electrical transport properties, while defects ameliorates its thermal transport.

The “electron crystal” behavior in copper chalcogenides Cu2X (X = Se, S)

2017 ◽  
Vol 5 (10) ◽  
pp. 5098-5105 ◽  
Author(s):  
Yongxing Sun ◽  
Lili Xi ◽  
Jiong Yang ◽  
Lihua Wu ◽  
Xun Shi ◽  
...  
Keyword(s):  
Transport Properties ◽  
Valence Band ◽  
Electronic Structures ◽  
Electrical Transport ◽  
Valence Band Maximum ◽  
Electrical Transport Properties ◽  
Band Maximum ◽  
Copper Chalcogenides ◽  
Structural Fluctuation ◽  
Electron Crystal

In Cu2Se, the structural fluctuation of the Cu sites have minor effects on the electronic structures around valence band maximum. The electrical transport properties of Cu2Se are mainly determined by the Se sublattice; Cu atoms serve as the carrier reservoirs.

Enhanced thermoelectric properties of polycrystalline BiCuSeO via dual-doping in Bi sites

2019 ◽  
Vol 6 (3) ◽  
pp. 799-807 ◽  
Author(s):  
Fu Li ◽  
Min Ruan ◽  
Yuexing Chen ◽  
Wenting Wang ◽  
Jingting Luo ◽  
...  
Keyword(s):  
Transport Properties ◽  
Thermoelectric Properties ◽  
Electrical Transport ◽  
Electrical Transport Properties ◽  
Co Doped

Enhanced electrical transport properties are achieved for La, Pb co-doped BiCuSeO, resulting in optimized thermoelectric properties.

Ternary Skutterudites: Anion Ordering and Thermoelectric Properties

2007 ◽  
Vol 1044 ◽  
Author(s):  
Paz Vaqueiro ◽  
Gerard G. Sobany
Keyword(s):  
Seebeck Coefficient ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Electrical Transport ◽  
Powder Diffraction Data ◽  
Electrical Transport Properties ◽  
Electrical Resistivities ◽  
Thermal Conductivities

AbstractThe ternary skutterudites AB1.5Q1.5 (A = Co, Rh, Ir, B =Ge, Sn and Q = S, Te) have been synthesized and structurally characterised. Powder diffraction data are consistent with the presence of anion ordering, which results in a lowering of the symmetry from cubic to rhombohedral. The ordered skutterudite structure contains rhomboidal four-membered B2Q2 rings, instead of the homonuclear rectangular rings found in binary skutterudites. The electrical transport properties of the AB1.5Q1.5 phases are consistent with semiconducting behaviour, and large values of the Seebeck coefficient have been observed for several of these materials. While their large electrical resistivities might make these materials unsuitable for thermoelectric applications unless significant improvements can be achieved by doping, these materials also exhibit significantly lower thermal conductivities than their binary counterparts.

scholarly journals Gold Nanoparticle-Mediated Noncovalent Functionalization of Graphene for Field-Effect Transistor

2021 ◽  
Author(s):  
Dongha Shin ◽  
Hwa Rang Kim ◽  
Byung Hee Hong
Keyword(s):  
Transport Properties ◽  
Gold Nanoparticle ◽  
Electrical Transport ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistor ◽  
Electrical Transport Properties ◽  
Noncovalent Functionalization ◽  
Effect Transistor

Since of its first discovery, graphene has attracted much attention because of the unique electrical transport properties that can be applied to high-performance field-effect transistor (FET). However, mounting chemical functionalities...

scholarly journals Pressure-Induced Structural Phase Transition and Metallization in Ga2Se3 up to 40.2 GPa under Non-Hydrostatic and Hydrostatic Environments

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 746
Author(s):  
Meiling Hong ◽  
Lidong Dai ◽  
Haiying Hu ◽  
Xinyu Zhang
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
High Pressure ◽  
Phase Transformation ◽  
Transport Properties ◽  
Electrical Transport ◽  
Structural Phase ◽  
Structure Evolution ◽  
Systematic Research ◽  
Electrical Transport Properties

A series of investigations on the structural, vibrational, and electrical transport characterizations for Ga2Se3 were conducted up to 40.2 GPa under different hydrostatic environments by virtue of Raman scattering, electrical conductivity, high-resolution transmission electron microscopy, and atomic force microscopy. Upon compression, Ga2Se3 underwent a phase transformation from the zinc-blende to NaCl-type structure at 10.6 GPa under non-hydrostatic conditions, which was manifested by the disappearance of an A mode and the noticeable discontinuities in the pressure-dependent Raman full width at half maximum (FWHMs) and electrical conductivity. Further increasing the pressure to 18.8 GPa, the semiconductor-to-metal phase transition occurred in Ga2Se3, which was evidenced by the high-pressure variable-temperature electrical conductivity measurements. However, the higher structural transition pressure point of 13.2 GPa was detected for Ga2Se3 under hydrostatic conditions, which was possibly related to the protective influence of the pressure medium. Upon decompression, the phase transformation and metallization were found to be reversible but existed in the large pressure hysteresis effect under different hydrostatic environments. Systematic research on the high-pressure structural and electrical transport properties for Ga2Se3 would be helpful to further explore the crystal structure evolution and electrical transport properties for other A2B3-type compounds.

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