Studies on sintering effect on the transport properties ofPb1−xSmxSe

Ibrahim, M.M.; Saleh, Sherif; Ibrahim, E.M.M.; Hakeem, A.M. Abdel

doi:10.1088/0031-8949/75/5/012

Cited by 11 publications

(4 citation statements)

References 33 publications

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“…In general, the overall behavior of the samples does not vary with variation of the annealing temperature or time and the σ-T plots exhibit a conduction transition at a certain temperature Tσ. To be specific, in the low temperature range (100 ⩽ T ⩽ Tσ), σ decreases with increasing temperature and the behavior is characterized by semi-metallic conduction attributed to the carrier scattering process [1,14,[30][31][32]. In the high temperature range, above Tσ, the conductivity increases with increasing ambient temperature, suggesting an intrinsic semiconducting mechanism [27].…”

Section: Resultsmentioning

confidence: 99%

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi₂Se₃

Ibrahim¹,

Hakeem²,

Adam³

et al. 2015

Phys. Scr.

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Polycrystalline samples of (Bi 0.95 Sb 0.05 ) 2 Se 3 were prepared using the conventional melting technique at 1273 K, followed by annealing at different temperatures (423, 473, 523 and 573 K) for different time intervals (4, 8, 12 and 16 h). The samples were crystallized in a single phase of Bi 2 Se 3 and no other phases or impurities were observed. The electrical and thermoelectric properties were studied by measuring the electrical conductivity and Seebeck coefficient as functions of temperature in the range 100-400 K. The results exhibited a metal-n-type semiconductor transition for all samples. The power factor (Pf) was calculated to determine the effect of the annealing treatment on the performance of the prepared material as a thermoelectric power generator. The highest room temperature value of the Pf was 6.9 μWK −2 cm −1 and was recorded for the sample annealed at 573 K for 16 h. The results confirm the feasibility of using the annealing process to improve the performance of thermoelectric materials.

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Section: Resultsmentioning

confidence: 99%

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi₂Se₃

Ibrahim¹,

Hakeem²,

Adam³

et al. 2015

Phys. Scr.

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“…The energy crisis motivates researchers to look for alternative energy resources such as thermoelectrics (TE), solar cells and superconductors [1][2][3][4][5][6][7][8][9][10]. Recently, various organic materials have attracted the interest of many researcher groups as TE materials [11,12] but TE properties of the metal-Schiff base complexes remain unreported.…”

Section: Introductionmentioning

confidence: 99%

The electric and thermoelectric properties of Cu(II)-Schiff base nano-complexes

et al. 2018

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The physical properties, such as electric and optical properties, of metal-Schiff base complexes have been widely investigated. However, their thermoelectric (TE) properties remain unreported. This work presents Cu(II)-Schiff base complexes as promising materials for TE power generation. Therefore, three Cu(II)-Schiff base complexes (namely,The electric and TE properties have been studied and comprehensive discussions have been presented to promote the nano-complexes (NCs) practical applications in the field of TE power generation. The electrical measurements confirm that the NCs are semiconductors and the electrical conduction process is governed by intermolecular and intramolecular transfer of the charge carriers. The TE measurements reveal that the Cu(II)-Schiff base NCs are nondegenerate P-type semiconductors. The measured Seebeck coefficient values were higher compared to the values reported in previous works for other organic materials indicating that the complexes under study are promising candidates for theremoelectric applications if the electrical conductivity could be enhanced.

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“…The highest PF value was found to be 15.51 μWK −2 cm −1 at T = 330 K and recorded for the undoped composition (x = 0). Comparison to other reported values shows that the conventional melting technique is a proper method to get high PF values rather than using shear extrusion or hot-pressed techniques [21,34,35].…”

Section: Resultsmentioning

confidence: 76%

Transport properties of the system Bi₂Te_2.7Se_0.3−xPb_xfabricated by a conventional melting technique

Hakeem¹

2015

Phys. Scr.

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N-type Bi2Te2.7Se0.3−xPbx (x = 0, 0.02, 0.04, 0.06 and 0.08) thermoelectric compounds have been prepared by a conventional melting technique. Microstructure analyses have been carried out for all samples using x-ray diffraction and a scanning electron microscope. The data reveal that the samples are crystallized in the polycrystalline rhombohedral Bi2Te3 phase and the grains have irregular shapes and sizes. The chemical stoichiometry has been examined by means of energy dispersive x-ray spectroscopy (EDAX). The stoichiometries match with the chemical formula (Bi)2(Te-Se-Pb)3. However, superstoichiometry of Pb at the expense of Se content has been observed. The thermoelectric measurements prove that the dominant charge carriers in all materials are electrons over the temperature range of measurements (200–400 K). The temperature dependence of the electrical conductivity shows metallic behavior for all the nominal compositions and over the whole range of temperature. The highest power factor value was recorded for the undoped sample at T = 330 K and was found to be 15.51 μWK−2 cm−1.

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Studies on sintering effect on the transport properties ofPb_1−xSm_xSe

Cited by 11 publications

References 33 publications

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi₂Se₃

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi₂Se₃

The electric and thermoelectric properties of Cu(II)-Schiff base nano-complexes

Transport properties of the system Bi₂Te_2.7Se_0.3−xPb_xfabricated by a conventional melting technique

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Studies on sintering effect on the transport properties ofPb1−xSmxSe

Cited by 11 publications

References 33 publications

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi2Se3

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi2Se3

The electric and thermoelectric properties of Cu(II)-Schiff base nano-complexes

Transport properties of the system Bi2Te2.7Se0.3−xPbxfabricated by a conventional melting technique

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Studies on sintering effect on the transport properties ofPb_1−xSm_xSe

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi₂Se₃

Effect of heat treatment on the electrical and thermoelectric properties of Sb doped Bi₂Se₃

Transport properties of the system Bi₂Te_2.7Se_0.3−xPb_xfabricated by a conventional melting technique