N-Type thermoelectric metal chalcogenide (Ag, Pb, Bi)(S, Se, Te) designed by multi-site-type high-entropy alloying. Issue 9 (2nd September 2021)

• Record Type: Journal Article
• Authors: Yamashita, Aichi; Goto, Yosuke; Miura, Akira; Moriyoshi, Chikako; Kuroiwa, Yoshihiro; Mizuguchi, Yoshikazu
• Is Part Of: Materials research letters. Volume 9:Issue 9(2021)
• Page Start: 366
• Page End: 372
• Publication Date: 2021-09-02
• Subjects: High-entropy-alloy -- material design -- new thermoelectric material -- NaCl-type structure; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2021.1929533
• Languages: English
• ISSNs: 2166-3831

Abstract

Abstract : A metal chalcogenide (Ag, Pb, Bi)(S, Se, Te) with an NaCl-type structure was designed by multi-site-type high-entropy alloying (MST-HEA), and the thermoelectric properties were investigated. In this material, both cation and anion sites were alloyed and thus its total entropy of mixing Δ S mix (total) achieved 2.00 R ( R : gas constant). It was found that present sample is an n-type semiconductor with ultra-low lattice thermal conductivity ( κ L ) of 0.62 Wm −1 K −1 at room temperature and 0.46 Wm −1 K −1 at T = 723 K. Very low κ L and good power factor resulted in figure of merit of 0.54 at T = 723 K. IMPACT STATEMENT: We report on the material design synthesis and thermoelectric properties on new high-entropy alloy-type compound with an NaCl-type structure (Ag, Pb, Bi)(S, Se, Te)