Single‐Crystal SnSe Thermoelectric Fibers via Laser‐Induced Directional Crystallization: From 1D Fibers to Multidimensional Fabrics
Source abstract
Abstract
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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China
Sibley School of Mechanical and Aerospace Engineering Cornell University Ithaca NY 14853 USA
School of Materials Science and Engineering Central South University Changsha 410083 China
Center for Information Photonics and Energy Materials Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China
School of Materials Science and Engineering Beihang University Beijing 100191 China
CINTRA CNRS/NTU/THALES UMI3288 Research Techno Plaza 50 Nanyang Drive Singapore 637553 Singapore
Funding
Ministry of Education - Singapore · National Research Foundation Singapore · National Natural Science Foundation of China
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