Semiconducting glasses: A new class of thermoelectric materials?

Gonçalves, A.P.; Lopes, Elsa B.; Delaizir, Gaëlle; Vaney, Jean‐Baptiste; Lenoir, Bertrand; Piarristeguy, Andréa; Pradel, Annie; Monnier, Judith; Ochin, P.; Godart, C.

doi:10.1016/j.jssc.2012.03.031

Cited by 40 publications

(25 citation statements)

References 16 publications

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“…For samples doped with Bi, the S-value increases from ~60 µV/K at RT to ~90 µV/K at 523 K, yet these S-values are nowhere close to the state of the art p -type thermoelectric materials [9,15,42,43,44,45]. Though these experiments to improve the thermoelectric properties by highly crystallizing the glass compositions vastly improves

σ

values, S-values were drastically reduced because of systematic loss of characteristic telluride glass features, as telluride glasses are known for their exceptionally high Seebeck coefficient values [25,26,28]. …”

Section: Resultsmentioning

confidence: 99%

“…At room temperature, it possess a high Seebeck coefficient of ~960 µV/K, but the electrical conductivity is too low (~10 −3 S/m) [27,28,29]. …”

Section: Resultsmentioning

confidence: 99%

“…An array of compositions of chalcogenide semiconducting glasses and glass-ceramics with low thermal conductivity and unusually high electrical conductivity for a glassy phase have been previously reported [25,26,27]. Though these kind of semiconducting glasses, especially Cu-doped telluride glasses, exhibit high Seebeck coefficient of around 600 µV/K at room temperatures [25,26,28,29,30,31,32], their high degree of structural disorder causes large electron scatterings that results in low mobility and electrical conductivity, which pulls down the power factor and overall zT to values that are too low for any relevant large-scale industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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Thermoelectric Properties of Highly-Crystallized Ge-Te-Se Glasses Doped with Cu/Bi

et al. 2017

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Chalcogenide semiconducting systems are of growing interest for mid-temperature range (~500 K) thermoelectric applications. In this work, Ge20Te77Se3 glasses were intentionally crystallized by doping with Cu and Bi. These effectively-crystallized materials of composition (Ge20Te77Se3)100−xMx (M = Cu or Bi; x = 5, 10, 15), obtained by vacuum-melting and quenching techniques, were found to have multiple crystalline phases and exhibit increased electrical conductivity due to excess hole concentration. These materials also have ultra-low thermal conductivity, especially the heavily-doped (Ge20Te77Se3)100−xBix (x = 10, 15) samples, which possess lattice thermal conductivity of ~0.7 Wm−1 K−1 at 525 K due to the assumable formation of nano-precipitates rich in Bi, which are effective phonon scatterers. Owing to their high metallic behavior, Cu-doped samples did not manifest as low thermal conductivity as Bi-doped samples. The exceptionally low thermal conductivity of the Bi-doped materials did not, alone, significantly enhance the thermoelectric figure of merit, zT. The attempt to improve the thermoelectric properties by crystallizing the chalcogenide glass compositions by excess doping did not yield power factors comparable with the state of the art thermoelectric materials, as these highly electrically conductive crystallized materials could not retain the characteristic high Seebeck coefficient values of semiconducting telluride glasses.

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σ

Section: Resultsmentioning

confidence: 99%

“…At room temperature, it possess a high Seebeck coefficient of ~960 µV/K, but the electrical conductivity is too low (~10 −3 S/m) [27,28,29]. …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermoelectric Properties of Highly-Crystallized Ge-Te-Se Glasses Doped with Cu/Bi

et al. 2017

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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%

“…Up to now, the most conductive tellurium based glass is Cu 30 As 15 Te 55 prepared by melt spinning with an electrical conductivity of *0.1 V cm. 10 However, this value is still not sufficient for commercial application.…”

Section: -7mentioning

confidence: 99%

Comprehensive study of tellurium based glass ceramics for thermoelectric application

Cui

Boussard‐Plédel

Calvez

et al. 2015

Advances in Applied Ceramics

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Tellurium based glasses have interesting thermoelectric characteristics. However, their high electrical resistivity is still an obstacle to considering them for thermoelectric applications. In this work, the (Te 85 Se 15 ) 6020.6x As 4020.4x Cu x glass system was studied. This revealed that Cu can act as glass former and increase both glass thermal stability and electrical conductivity. The best candidate, (Te 85 Se 15 ) 45 As 30 Cu 25 , was chosen to prepare composites with Bi 0.5 Sb 1.5 Te 3 using spark plasma sintering. These glass ceramic samples exhibited a much better thermoelectric performance. Glass ceramics with 50 mol. % of Bi 0.5 Sb 1.5 Te 3 show a maximum ZT value equal to 0.37 at 413 K. Meanwhile, the advantages of glass including low sintering temperature and high formability are well maintained.

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Ultraflexible Temperature‐Strain Dual‐Sensor Based on Chalcogenide Glass‐Polymer Film for Human‐Machine Interaction

Fu,

Kang,

Xiang

et al. 2024

Advanced Materials

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Skin‐like thermoelectric (TE) films with temperature‐ and strain‐sensing functions are highly desirable for human‐machine interaction systems and wearable devices. However, current TE films still face challenges in achieving high flexibility and excellent sensing performance simultaneously. Herein, for the first time, we propose a facile roll‐to‐roll strategy to fabricate an ultraflexible chalcogenide glass‐polytetrafluoroethylene composite film with superior temperature‐ and strain‐sensing performance. The unique reticular network of the composite film endows it with efficient Seebeck effect and flexibility, leading to a high Seebeck coefficient (731 μV/K), rapid temperature response (∼0.7 s), and excellent strain sensitivity (gauge factor = 836). Based on this high‐performance composite film, an intelligent robotic hand for action feedback and temperature alarm was fabricated, demonstrating its great potential in human‐machine interaction. Such TE film fabrication strategy not only brings new inspiration for wearable inorganic TE devices, but also sets the stage for a wide implementation of multifunctional human‐machine interaction systems.This article is protected by copyright. All rights reserved

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Semiconducting glasses: A new class of thermoelectric materials?

Cited by 40 publications

References 16 publications

Thermoelectric Properties of Highly-Crystallized Ge-Te-Se Glasses Doped with Cu/Bi

Thermoelectric Properties of Highly-Crystallized Ge-Te-Se Glasses Doped with Cu/Bi

Comprehensive study of tellurium based glass ceramics for thermoelectric application

Ultraflexible Temperature‐Strain Dual‐Sensor Based on Chalcogenide Glass‐Polymer Film for Human‐Machine Interaction

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