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

Lin Pan; Jieyun Zhang; Changchun Chen; Yifeng Wang

doi:10.1016/j.scriptamat.2019.12.003

Enhanced thermoelectric properties of highly textured Bi₂O₂ _xSe₁₊ _x with liquid-phase mechanical exfoliation

Lin Pan, Jieyun Zhang, Changchun Chen, Yifeng Wang

College of Materials Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

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 Bi₂O_1.96Se_1.04 with LME, which is a new ZT record of Bi₂O₂Se based thermoelectrics.

Original language	English
Pages (from-to)	376-381
Number of pages	6
Journal	Scripta Materialia
Volume	178
DOIs	https://doi.org/10.1016/j.scriptamat.2019.12.003
State	Published - 15 Mar 2020

Keywords

BiOSe
Defects
Texturation
Thermoelectric

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10.1016/j.scriptamat.2019.12.003

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

abstract = "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 ZTpeak 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.",

keywords = "BiOSe, Defects, Texturation, Thermoelectric",

author = "Lin Pan and Jieyun Zhang and Changchun Chen and Yifeng Wang",

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T1 - Enhanced thermoelectric properties of highly textured Bi2O2 xSe1+ x with liquid-phase mechanical exfoliation

AU - Pan, Lin

AU - Zhang, Jieyun

AU - Chen, Changchun

AU - Wang, Yifeng

PY - 2020/3/15

Y1 - 2020/3/15

N2 - 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 ZTpeak 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.

AB - 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 ZTpeak 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.

KW - BiOSe

KW - Defects

KW - Texturation

KW - Thermoelectric

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DO - 10.1016/j.scriptamat.2019.12.003

M3 - 文章

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SN - 1359-6462

VL - 178

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

Enhanced thermoelectric properties of highly textured Bi₂O₂ _xSe₁₊ _x with liquid-phase mechanical exfoliation

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Keywords

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