Cu-incorporation by melt-spinning in n-type Bi2Te2.7Se0.3 alloys for low-temperature power generation. (1st July 2019)

• Record Type: Journal Article
• Authors: Kim, Minyoung; Kim, Sang-il; Cho, Hyun-joon; Mun, Hyuna; Kim, Hyun-sik; Lim, Jae-Hong; Kim, Sung Wng; Lee, Kyu Hyoung
• Is Part Of: Scripta materialia. Number 167(2019)
• Page Start: 120
• Page End: 125
• Publication Date: 2019-07-01
• Subjects: Thermoelectric -- Bi2Te2.7Se0.3 -- Cu incorporation -- Carrier tuning -- Band modification; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.04.006
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Herein, we report the enhanced thermoelectric performance of Cu incorporated Bi2 Te2.7 Se0.3 prepared by melt spinning. The electronic transport properties were significantly improved by Cu incorporation due to the synergetic effect of carrier tuning, band modification, and electron-phonon transport control. The steady dimensionless thermoelectric figure of merit higher than 0.90 was achieved in the wide range of temperature range of 350–450 K for Cu0.008 Bi2 Te2.7 Se0.3, which is ~30% enhancement in comparison with pristine Bi2 Te2.7 Se0.3 . This result can lead to high thermoelectric power generation efficiency 4.2% at Δ T = 180 K. Graphical abstract: Unlabelled Image