An argyrodite-type Ag9GaSe6 liquid-like material with ultralow thermal conductivity and high thermoelectric performance

Binbin Jiang; Pengfei Qiu; Hongyi Chen; Qihao Zhang; Kunpeng Zhao; Dudi Ren; Xun Shi; Lidong Chen

doi:10.1039/c7cc05935c

An argyrodite-type Ag₉GaSe₆ liquid-like material with ultralow thermal conductivity and high thermoelectric performance

Chem Commun (Camb). 2017 Oct 24;53(85):11658-11661. doi: 10.1039/c7cc05935c.

Authors

Binbin Jiang¹, Pengfei Qiu, Hongyi Chen, Qihao Zhang, Kunpeng Zhao, Dudi Ren, Xun Shi, Lidong Chen

Affiliation

¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. qiupf@mail.sic.ac.cn xshi@mail.sic.ac.cn.

PMID: 29018853
DOI: 10.1039/c7cc05935c

Abstract

We report a ternary argyrodite-type Ag₉GaSe₆ compound as a promising thermoelectric material in a moderate temperature range. Due to high carrier mobility and ultralow lattice thermal conductivity, a maximum ZT of 1.1 was obtained with stoichiometric Ag₉GaSe₆ at 800 K. Via introducing slight Se-deficiency to optimize the carrier concentration, the maximum ZT is further enhanced to 1.3.