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Journal of Materials Science
Erschienen in: Journal of Materials Science 21/2018

13.07.2018 | Chemical routes to materials

CuAgSe nanocrystals: colloidal synthesis, characterization and their thermoelectric performance

verfasst von: Yong Zuo, Yu Liu, Qiong-Ping He, Ji-Ming Song, He-Lin Niu, Chang-Jie Mao

Erschienen in: Journal of Materials Science | Ausgabe 21/2018

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Abstract

CuAgSe is a promising thermoelectric (TE) material for its superior carrier mobility and ultralow lattice thermal conductivity. Herein, we present a scalable colloidal method to prepare monodisperse CuAgSe nanocrystals with high yield. The collected powder sample was washed by a sulfur-free reagent of NaNH2 to remove the surface organic ligands (CuAgSe-W) and then annealed (CuAgSe-W-A). Both kinds of ligand-free samples were then hot pressed into dense pellets to measure the TE property. The results revealed that the crystal structure of both samples changed from low-temperature β-phase to high-temperature α-phase at around 465 K. Sample CuAgSe-W shows interesting temperature-dependent transition from N-type to P-type, which could be potentially used as thermal control transistor. Sample CuAgSe-W-A does not display this transition state but it exhibits potential for intermediate temperature TE applications with a figure-of-merit zT reaching 0.68 at 566 K.
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Metadaten
Titel
CuAgSe nanocrystals: colloidal synthesis, characterization and their thermoelectric performance
verfasst von
Yong Zuo
Yu Liu
Qiong-Ping He
Ji-Ming Song
He-Lin Niu
Chang-Jie Mao
Publikationsdatum
13.07.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 21/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2676-7

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