Superior bendability enabled by inherent in-plane elasticity in Bi2Te3 thermoelectrics

IF 10 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Today Physics Pub Date : 2024-10-16 DOI:10.1016/j.mtphys.2024.101570
Yixin Hu , Xinyi Shen , Zhiwei Chen, Min Liu, Xinyue Zhang, Long Yang, Jun Luo, Wen Li, Yanzhong Pei
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Abstract

With the rapid development of modern wearable electronics, powerful and deformable thermoelectric generators have become an urgent need as the power units that convert environmental or body heat into electricity. Existing efforts mostly focused on the assistance for deformability by substrates/additives, the resultant devices usually output much less power and showed very poor power retainment. Elasticity is inherent to all solids, which therefore offers an intrinsic solution for making thermoelectrics deformable without compromise in power output because of its full recoverability. This work demonstrates this in best-performing (Bi, Sb)2(Te, Se)3 thermoelectrics near room temperature, ending up in the film devices with both extraordinary power density and robust recoverable bendability. This originates from the inherent large elasticity for the in-plane orientation, which is enabled by an easy tape stripping approach for the Van der Waals layered structure, allowing the realization of both powerfulness and bendability that are equally important for wearable thermoelectrics.
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利用 Bi2Te3 热电材料固有的面内弹性实现卓越的可弯曲性
随着现代可穿戴电子设备的快速发展,迫切需要功能强大、可变形的热电发生器作为将环境或人体热量转化为电能的动力装置。现有的努力大多集中在通过基材/添加剂来帮助实现可变形性,由此产生的设备通常输出的功率要小得多,而且功率保持能力非常差。弹性是所有固体所固有的,因此,它提供了一个内在的解决方案,使热电半导体器件具有可变形性,并且由于其完全可恢复性而不会影响功率输出。这项工作在室温附近性能最佳的 (Bi,Sb)2(Te,Se)3 热电半导体中证明了这一点,最终薄膜设备具有超高功率密度和强大的可恢复弯曲性。这源于面内取向的固有大弹性,而范德华层状结构的简易胶带剥离方法使这种弹性成为可能,从而实现了对可穿戴热电设备同样重要的功率密度和可弯曲性。
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来源期刊
Materials Today Physics
Materials Today Physics Materials Science-General Materials Science
CiteScore
14.00
自引率
7.80%
发文量
284
审稿时长
15 days
期刊介绍: Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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