Tailoring microstructure and electrical transportation through tensile stress in Bi2Te3 thermoelectric fibers

Min Sun; Guowu Tang; Bowen Huang; Zhongjia Chen; Yu-Jun Zhao; Hanfu Wang; Ziwen Zhao; Dongdan Chen; Qi Qian; Zhongmin Yang

Journal of Materiomics (Sep 2020)

Tailoring microstructure and electrical transportation through tensile stress in Bi2Te3 thermoelectric fibers

Min Sun,
Guowu Tang,
Bowen Huang,
Zhongjia Chen,
Yu-Jun Zhao,
Hanfu Wang,
Ziwen Zhao,
Dongdan Chen,
Qi Qian,
Zhongmin Yang

Affiliations

Min Sun: School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510640, China; State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China
Guowu Tang: School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510640, China; State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China
Bowen Huang: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China
Zhongjia Chen: School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510640, China
Yu-Jun Zhao: School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510640, China
Hanfu Wang: CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology of China, Beijing, 100190, China
Ziwen Zhao: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, School of Communication and Information Engineering, Shanghai University, Shanghai, 200072, China
Dongdan Chen: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China
Qi Qian: State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China; Corresponding author.
Zhongmin Yang: School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510640, China; State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China; Corresponding author. State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Material and Applied Techniques, South China University of Technology, Guangzhou, 510640, China.

Journal volume & issue: Vol. 6, no. 3
pp. 467 – 475

Abstract

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Bismuth telluride (Bi2Te3) has attracted much attention in the field of thermoelectrics since it is one kind of commercial room-temperature thermoelectric material. Herein three kinds of Bi2Te3 thermoelectric fibers with internal tensile stress are fabricated utilizing an optical fiber template method. The effects of internal stress on the microstructure and the electrical transportation of Bi2Te3 thermoelectric fibers are investigated. The Bi2Te3 cores in the fibers are highly crystalline and possess a tensile nanosheet structure with preferential orientation as evidenced by X-ray diffraction and Raman studies. Tensile stress can enhance electrical properties of the fibers. And a paper cup generator covered with 20 pieces of optimized fibers provides a μW-level output power. It is inferred that tensile stress tuning can be an effective tool for the material optimization of thermoelectric performance.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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