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Title: Single-crystal SnSe thermoelectric fibers via laser-induced directional crystallization : from 1D fibers to multidimensional fabrics
Authors: Zhang, Jing
Zhang, Ting
Zhang, Hang
Wang, Zhixun
Li, Chen
Wang, Zhe
Li, Kaiwei
Huang, Xingming
Chen, Ming
Chen, Zhe
Tian, Zhiting
Chen, Haisheng
Zhao, Li-Dong
Wei, Lei
Keywords: Engineering::Materials::Functional materials
Issue Date: 2020
Source: Zhang, J., Zhang, T., Zhang, H., Wang, Z., Li, C., Wang, Z., Li, K., Huang, X., Chen, M., Chen, Z., Tian, Z., Chen, H., Zhao, L. & Wei, L. (2020). Single-crystal SnSe thermoelectric fibers via laser-induced directional crystallization : from 1D fibers to multidimensional fabrics. Advanced Materials, 32(36), 2002702-.
Project: MOE2019-T2-2-127 
Journal: Advanced Materials
Abstract: Single-crystal tin selenide (SnSe), a record holder of high-performance thermoelectric materials, enables high-efficient interconversion between heat and electricity for power generation or refrigeration. However, the rigid bulky SnSe cannot satisfy the applications for flexible and wearable devices. Here, a method is demonstrated to achieve ultralong single-crystal SnSe wire with rock-salt structure and high thermoelectric performance with diameters from micro- to nanoscale. This method starts from thermally drawing SnSe into a flexible fiber-like substrate, which is polycrystalline, highly flexible, ultralong, and mechanically stable. Then a CO2 laser is employed to recrystallize the SnSe core to single-crystal over the entire fiber. Both theoretical and experimental studies demonstrate that the single-crystal rock-salt SnSe fibers possess high thermoelectric properties, significantly enhancing the ZT value to 2 at 862 K. This simple and low-cost approach offers a promising path to engage the fiber-shaped single-crystal materials in applications from 1D fiber devices to multidimensional wearable fabrics.
ISSN: 0935-9648
DOI: 10.1002/adma.202002702
Rights: © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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