Enhanced thermoelectric properties of highly textured Bi2O2-xSe1+x with liquid-phase mechanical exfoliation

被引：27

作者：

Pan, Lin ^{[1
,2
]}

Zhang, Jieyun ^{[1
]}

Chen, Changchun ^{[1
]}

Wang, Yifeng ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China

[2] Nanjing Tech Univ, Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct, Nanjing 210009, Peoples R China

来源：

SCRIPTA MATERIALIA | 2020年 / 178卷

基金：

中国国家自然科学基金;

关键词：

Thermoelectric; Bi2O2Se; Defects; Texturation; N-TYPE BI2O2SE; PERFORMANCE; CERAMICS;

D O I：

10.1016/j.scriptamat.2019.12.003

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present work, an artificial designed composition defects coupled with liquid-phase mechanical exfoliation (LME) was introduced to improve the thermoelectric performance of Bi2O2Se. The results indicate that non-stoichiometric of Bi2O2Se with LME could induce high grain orientation. Moreover, the electrical conductivity of Bi2O2-xSe1+x with LME have been greatly improved due to both higher carrier concentration and holes mobility. In contrast, a relatively low thermal conductivity had been retained. Finally, A high ZT(peak) of around 0.54 at 773 K was obtained for the sample Bi2O1.96Se1.04 with LME, which is a new ZT record of Bi2O2Se based thermoelectrics. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：376 / 381

页数：6

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