Texturation boosts the thermoelectric performance of BiCuSeO oxyselenidesElectronic supplementary information (ESI) available: Experimental details, and the typical textured samples used in this study (Fig. S1); cross-section orientation maps of Bi0.875Ba0.125CuSeO samples before and after hot-forging (Fig. S2 and S3); temperature dependence on heat capacity, thermal diffusivity, Lorenz numbers, and electronic thermal conductivity (Fig. S4) for textured Bi0.875Ba0.125CuSeO samples. See DOI: 10.1

We present a high ZT ∼ 1.4 in textured Bi 0.875 Ba 0.125 CuSeO obtained by a hot-forging process. The carrier mobility along the direction perpendicular to the pressing direction was significantly increased, resulting in increase in the electrical conductivity and maximization of the power factor at...

Full description

Saved in:
Bibliographic Details
Main Authors: Sui, Jiehe, Li, Jing, He, Jiaqing, Pei, Yan-Ling, Berardan, David, Wu, Haijun, Dragoe, Nita, Cai, Wei, Zhao, Li-Dong
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a high ZT ∼ 1.4 in textured Bi 0.875 Ba 0.125 CuSeO obtained by a hot-forging process. The carrier mobility along the direction perpendicular to the pressing direction was significantly increased, resulting in increase in the electrical conductivity and maximization of the power factor at 923 K from 6.3 μW cm −1 K −2 for the sample before hot-forging to 8.1 μW cm −1 K −2 after the hot-forging process. Therefore, the maximum ZT was significantly increased from ∼1.1 to 1.4 through texturing for Bi 0.875 Ba 0.125 CuSeO, which is the highest ZT ever reported among oxygen containing materials. A high ZT of ∼1.4 at 923 K for Bi 0.875 Ba 0.125 CuSeO has been achieved by textured processing through improving the carrier mobility.
ISSN:1754-5692
1754-5706
DOI:10.1039/c3ee41859f