Thermoelectric power properties of Ge doped PbTe alloys

Adam, A.M.; Ibrahim, E.M.M.; Panbude, Anshu; Jayabal, K.; Veluswamy, Pandiyarasan; Diab, A.K.

doi:10.1016/j.jallcom.2021.159630

Cited by 29 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Crystalline asymmetric band structure with rhombohedral unit cell has been observed for these compounds [1]. Narrow band gap chalcogenide semiconductors of layer structure show interest and high potential for thermoelectric and Hall-effect applications in addition to interesting electrophysical and galvanomagnetic features [2].…”

Section: Introductionmentioning

confidence: 94%

Structure, thermal and physic-chemical properties of some chalcogenide alloys

et al. 2023

View full text Add to dashboard Cite

Bulk products of crystalline Bi2Se3-xTex alloys (x =0.0, 0.1, 0.3, 0.5) were prepared using simple melting synthesis. Crystalline features, microstructure and surface morphologies of the synthesized samples were examined via x-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive x-ray spectrometer. Elemental distribution was studied by energy dispersive analysis of X-ray (EDAX) spectroscopy. Polycrystalline of rhombohedral crystal structure was observed for the concerned samples. Perfect crystallinity and micro-scalability of the prepared were also reflected by the physic-chemical properties of each sample. Thermal behavior was studied throughout differential scanning calorimetry and thermogravimetric analysis showing that the samples are of high stability over high temperature range. Physic-chemical properties were determined in terms of experimental density. These properties were compactness value, molar volume and the percentage of free volume. Density of Bi2Se3 alloy was obtained at 7.37 gm/cm3. Te doping enhanced the density of the Bi2Se3-xTex system. The most Te doped alloy showed density of 9.018 gm/cm3. All other physic-chemical properties showed strong dependence on the Tea amounts in the system.

show abstract

Section: Introductionmentioning

confidence: 94%

Structure, thermal and physic-chemical properties of some chalcogenide alloys

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Also, stoichiometrically weighed Bi and Te elements for the composition (Bi 2 ) m (Bi 2 Te 3 ) m vacuum sealed in a silica tube was treated at 1173 K and quenched after 6 h [471], whereas Zhu et al have synthesized Bi 0.5 Sb 1.5 Te 3 samples, which were sealed under vacuum in a quartz tube after it was melted at 1073 K for 6 h [472]. In addition to that, many PbTe based alloys such as PbTe-x% ZnTe [473], Pb 1−x Gd x Te [19], (PbTe) n -Sb 2 Te 3 [252], Pb 1−x Ge x Te [474], have been synthesized by vacuum sealing and melting method.…”

Section: Vacuum Sealing-melting Reactionmentioning

confidence: 99%

Physics and technology of thermoelectric materials and devices

Dadhich

Saminathan

Kumari

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The continuous depletion of fossil fuels and the increasing demand for eco-friendly and sustainable energy sources have prompted researchers to look for alternative energy sources. The loss of thermal energy in heat engines (100-350 ºC), coal-based thermal plants (150-700 ºC), heated water pumping in the geothermal process (150-700 ºC), and burning of petrol in the automobiles (150-250 ºC) in form of untapped waste-heat can be directly and/or reversibly converted into usable electricity by means of charge carriers (electrons or holes) as moving fluids using thermoelectric (TE) technology, which works based on typical Seebeck effect. The enhancement in TE conversion efficiency has been a key challenge because of the coupled relation between thermal and electrical transport of charge carriers in a given material. In this review, we have deliberated the physical concepts governing the materials to device performance as well as key challenges for enhancing the TE performance. Moreover, the role of crystal structure in the form of chemical bonding, crystal symmetry, order-disorder and phase transition on charge carrier transport in the material has been explored. Further, this review has also emphasized some insights on various approaches employed recently to improve the TE performance, such as, (i). carrier engineering via band engineering, low dimensional effects, and energy filtering effects and (ii). Phonon engineering via doping/alloying, nano-structuring, embedding secondary phases in the matrix and microstructural engineering. Wehave also briefed the importance of magnetic elements on thermoelectric properties of the selected materials and spin Seebeck effect. Furthermore, the design and fabrication of TE modules and their major challenges are also discussed. As, thermoelectric figure of merit, zT does not have any theoretical limitation, an ideal high performance thermoelectric device should consist of low-cost, eco-friendly, efficient, n- or p-type materials that operate at wide- temperature range and similar coefficients of thermal expansion, suitable contact materials, less electrical/ thermal losses and constant source of thermal energy. Overall, this review provides the recent physical concepts adopted and fabrication procedures of TE materials and device so as to improve the fundamental understanding and to develop a promising TE device.

show abstract

“…The most important aspect determining this technology's ability to convert energy efficiently is its dimensionless figure of merit ZT for thermoelectric materials. ZT is commonly expressed using the following relation: (1) Where the parameters of this equation were defined in [2]. Over the past few decades, numerous efforts have been undertaken to improve the thermoelectric capability of different materials using several techniques, such as doping engineering [3].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric performance of Fe2ALV/CNT-based alloys

et al. 2023

View full text Add to dashboard Cite

Heusler-type Fe2VxTi 1-xAl alloys offer an alternative solution for the generation of thermoelectric power near room temperature. In the current research, thermoelectric properties of the p-type Fe2V0.9Ti0.1Al and Fe2V0.9Ti0.1Al/CNTs alloys, prepared by SPS, were studied. Carbon nanotubes (CNTs) were used as dopants to improve the Seebeck coefficient and electrical conductivity. Upon doping with CNTs, the thermal conductivity was significantly reduced, meanwhile, the value of the power factor increased from 0.45 to 1.55 mW/mK2 at around 330K. The effect of CNT inclusions on the thermoelectric parameters of Fe2VxTi 1-xAl compounds was systematically studied. When compared to Fe2V0.9Ti0.1Al, which had a figure of merit of just 0.02 at 330 K, the CNT-containing samples showed a significantly improved figure of merit up to 0.07. we offer a novel technique to improve the performance of Fe2VAl alloys.

show abstract

Thermoelectric power properties of Ge doped PbTe alloys

Cited by 29 publications

References 37 publications

Structure, thermal and physic-chemical properties of some chalcogenide alloys

Structure, thermal and physic-chemical properties of some chalcogenide alloys

Physics and technology of thermoelectric materials and devices

Thermoelectric performance of Fe2ALV/CNT-based alloys

Contact Info

Product

Resources

About