Design of Advanced Thermoelectric Materials
Shaabani, Laaya
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Publication date: 2018
Link to publication in University of Groningen/UMCG research database
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Shaabani, L. (2018). Design of Advanced Thermoelectric Materials. Rijksuniversiteit Groningen.
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Design of Advanced Thermoelectric Materials
Zernike Institute for Advanced Materials PhD thesis series 2018-14 ISSN: 1570-1530
ISBN: 978-94-034-0560-5 (printed version) ISBN: 978-94-034-0561-2 (electronic version)
The work described in this thesis was performed in the group “Solid State Materials for Electronics” (part of the Zernike Institute for Advanced Materials) at the University of Groningen, The Netherlands. This work was funded by the Dieptestrategie of the Zernike Institute for Advanced Materials.
Copyright © 2018 L. Shaabani. All rights reserved. No part of this thesis may be reproduced, stored in a retrieval system or transmitted in any form or be any means without prior written permission of the author.
Cover design by: Laaya Shaabani Layout by: Gildeprint
Design of Advanced Thermoelectric Materials
Proefschrift
ter verkrijging van de graad van doctor aan de Rijksuniversiteit Groningen
op gezag van de
rector magnificus prof. dr. E. Sterken, en volgens besluit van het College voor Promoties.
De openbare verdediging zal plaatsvinden op vrijdag 18 mei 2018 om 09:00 uur
door
Laaya Shaabani
geboren op 21 maart 1980 te Tabriz, Iran
Beoordelingscommissie
Prof. dr. B. J. Kooi Prof. dr. O. Oeckler Prof. dr. M. Huijben
1 Introduction 9
1.1 Introduction to thermoelectric materials 11 1.2 Selection criteria for thermoelectric materials 12 1.3 Approaches for enhancing thermoelectric figure of merit 17 1.3.1 Reducing thermal conductivity 17 1.3.2 Improving the power factor 17 1.4 Motivation and outline of thesis 18
Bibliography 19
2 Experimental techniques 23
2.1 Synthesis details 25
2.1.1 Carbon coating 25
2.1.2 Spark plasma sintering 26
2.2 Structural and chemical characterization 27 2.2.1 Powder X-ray diffraction (PXRD) 27 2.2.2 Scanning electron microscopy and energy-dispersive X-ray spectroscopy 27 2.3 Magnetic properties measurement 28
2.4 Hall measurements 28
2.5 High temperature thermoelectric properties measurement 29 2.5.1 Seebeck coefficient and electrical resistivity measurement 29 2.5.2 Thermal conductivity measurement 32
3 Thermoelectric performance of Na-doped GeSe 37
3.1 Introduction 39
3.2 Methods 41
3.2.1 Sample fabrication 41
3.2.2 Materials Characterization 41
3.3 Results and discussion 42
3.4 Conclusions 50
Bibliography 51
4 Thermoelectric performance of p-type single phase (PbTe)0.55(PbS)0.1(PbSe)0.35 57
4.1 Introduction 59
4.2 Experimental 60
4.2.1 Sample fabrication 60
4.2.2 Transport properties measurements 61 4.2.3 Materials Characterization 61
4.3 Results and Discussion 62
4.4 Conclusions 68
Bibliography 69
5 Thermoelectric performance of Ce-doped PbSe 73
5.1 Introduction 75
5.2 Experimental section 76
5.2.1 Sample fabrication 76
5.2.2 Transport properties measurements 76 5.2.3 Materials Characterization 77
5.3 Results and Discussion 77
5.4 Conclusions 82
Bibliography 83
6 High temperature ferromagnetism in Ce-doped PbSe 87
6.1 Introduction 89
6.3.3 Microstructural properties 95 6.3.4 Electrical resistivity, Seebeck coefficient and power factor 99
6.4 Conclusion 103
Bibliography 105
Summary 109
Samenvatting 113
