Grain boundary re-crystallization and sub-nano regions leading to high plateau figure of merit for Bi2Te3 nanoflakes

Author:

Liu Wei-Di12ORCID,Yin Liang-Cao3,Li Lei3,Yang Qishuo4,Wang De-Zhuang3,Li Meng2,Shi Xiao-Lei2,Liu Qingfeng3ORCID,Bai Yang5,Gentle Ian6,Wang Lianzhou1ORCID,Chen Zhi-Gang2ORCID

Affiliation:

1. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Australia

2. School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, 4000, Queensland, Australia

3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China

4. School of Mechanical and Mining Engineering, The University of Queensland, St Lucia, 4072, Queensland, Australia

5. Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China

6. School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, 4072, Australia

Abstract

Solvothermally synthesized Bi2Te3 nanoflakes can re-crystallize preferentially at the grain boundaries to form sub-nano boundary regions with a width <2 nm leading to a wide plateau figure of merit (zT) of >1.2 (from ∼323 to ∼423 K).

Funder

National Natural Science Foundation of China

Australian Research Council

Priority Academic Program Development of Jiangsu Higher Education Institutions

Publisher

Royal Society of Chemistry (RSC)

Subject

Pollution,Nuclear Energy and Engineering,Renewable Energy, Sustainability and the Environment,Environmental Chemistry

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