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Paper Abstract and Keywords
Presentation 2025-05-30 13:00
[Invited Talk] Development of heat ulitizing materials and devices using semiconductors possessing very low thermal conductivity -- Thermoelectric materials and devices, thermal diodes, and heart flow switching devices --
Tsunehiro Takeuchi (Toyote Tech. Inst,), Keisuke Hirata, Reiji Toida (Toyote Tech. Inst,) ED2025-1 CPM2025-1 SDM2025-15
Abstract (in Japanese) (See Japanese page) 
(in English) Silver chalcogenide Ag_2(S,Se,Te) is characterized by a small magnitude of the lattice thermal conductivity as low as 0.5 Wm^{-1}K^{-1} and electron transport properties of typical semiconductors. In this study, we investigated the mechanism leading to the low lattice thermal conductivity by means of MEM-Rietveld analysis and ultrasonic pulse-echo method. The performance of heat flow switching device, thermal diodes, and thermoelectric generators could be enhanced with semiconductors characterized by low lattice thermal conductivity. Indeed, we succeeded in developing high-performance heat flow switching devices, thermal diodes, and thermoelectric generators using the Ag_2(S,Se,Te).
Keyword (in Japanese) (See Japanese page) 
(in English) electron thermal conductivity / lattice thermal conductivity / anharmonic lattice vibrations / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 44, SDM2025-15, pp. 1-4, May 2025.
Paper # SDM2025-15 
Date of Issue 2025-05-23 (ED, CPM, SDM) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ED2025-1 CPM2025-1 SDM2025-15

Conference Information
Committee SDM ED CPM  
Conference Date 2025-05-30 - 2025-05-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Shizuoka Univ. (Hamamatsu) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Materials, fabrication, and characterization of functional devices 
Paper Information
Registration To SDM 
Conference Code 2025-05-SDM-ED-CPM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of heat ulitizing materials and devices using semiconductors possessing very low thermal conductivity 
Sub Title (in English) Thermoelectric materials and devices, thermal diodes, and heart flow switching devices 
Keyword(1) electron thermal conductivity  
Keyword(2) lattice thermal conductivity  
Keyword(3) anharmonic lattice vibrations  
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1st Author's Name Tsunehiro Takeuchi  
1st Author's Affiliation Toyota Technological Institute (Toyote Tech. Inst,)
2nd Author's Name Keisuke Hirata  
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3rd Author's Name Reiji Toida  
3rd Author's Affiliation Toyota Technological Institute (Toyote Tech. Inst,)
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Speaker Author-1 
Date Time 2025-05-30 13:00:00 
Presentation Time 50 minutes 
Registration for SDM 
Paper # ED2025-1, CPM2025-1, SDM2025-15 
Volume (vol) vol.125 
Number (no) no.42(ED), no.43(CPM), no.44(SDM) 
Page pp.1-4 
#Pages 4 
Date of Issue 2025-05-23 (ED, CPM, SDM) 

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