2011
DOI: 10.1007/s11664-010-1486-8
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Chalcogenide Glasses as Prospective Thermoelectric Materials

Abstract: Despite the fact that glasses have interesting characteristics for thermoelectric (TE) applications, their potential as TE materials has only recently been tested. In a recent article, we focused on glasses based on the Ge 20 Te 80 composition, which has a high Seebeck coefficient, S, showing that in Cu x+y Ge 20Àx Te 80Ày the power factor, S 2 /q (where q is the resistivity), strongly improves with increasing Cu concentration. Herein we report on the preparation of glasses in the Cu-Te-As system and their cha… Show more

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Cited by 26 publications
(40 citation statements)
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“…The lower power factor in mainly due to a higher electrical resistivity (3000 mO m) observed on the bulk in comparison with the initial ribbon [22]. EDS analysis of the bulk material showed a different chemical composition (Cu 32 As 8 Te 60 ) that was most probably due to the use of another melt-spinning equipment (suitable for handling the large quantities needed for the SPS sintering tests but with no precise temperature control under 800 1C) and the evaporation of arsenium and tellurium.…”
Section: The Processing Of Tellurium-based Semiconducting Glassesmentioning
confidence: 99%
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“…The lower power factor in mainly due to a higher electrical resistivity (3000 mO m) observed on the bulk in comparison with the initial ribbon [22]. EDS analysis of the bulk material showed a different chemical composition (Cu 32 As 8 Te 60 ) that was most probably due to the use of another melt-spinning equipment (suitable for handling the large quantities needed for the SPS sintering tests but with no precise temperature control under 800 1C) and the evaporation of arsenium and tellurium.…”
Section: The Processing Of Tellurium-based Semiconducting Glassesmentioning
confidence: 99%
“…The inclusion of copper in the As-Te system has been reported to enhance the glassy domain (prepared by conventional melt quenching) [20] and the electrical conductivity of the chalcogenide glasses [21]. Moreover, recent studies on Cu x As 45 À x Te 55 (20 oxo35) glasses prepared by melt spinning show a significant increasing of the vitreous domain when compared with the conventional melt quenching technique, which allowed higher copper concentrations in the glassy materials [22]. Besides, Cu x As 45 À x Te 55 glasses have T g $ 135 1C and T C -T g $ 35-40 1C that permits working temperatures higher than those of the Cu x þ y Ge 20 À x Te 80 À y glasses [22].…”
Section: The Tellurium-based Semiconducting Glassesmentioning
confidence: 99%
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“…To overcome this obstacle, there is the possibility of varying the compositions to control the carrier concentration. 11 The Cu-Ge-Te, Cu-Si-Te, Cu-Ga-Te and Cu-As-Te glassy systems were developed by Gonçalves et al 10,12,13 and Lucas et al…”
Section: -7mentioning
confidence: 99%