Dasha Mao, Yi Zhou, Yong Yu, Yan Wang, Meng Han, Qiyu Meng, Yao Lu, Jianghe Feng, Minghua Kong, Hailong Yang, Quan Gan, Xiao Xu, Lin Xie, Ghim Wei Ho, Jiaqing He
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引用次数: 0
摘要
柔性热电(TE)因其在弯曲/非平面界面上可匹配的热通量值而被用于自供电电子设备和热收集器,旨在实现热电、柔性和可扩展性之间的平衡。在这项工作中,我们构建了具有高密度退火孪晶边界的 Bi0.4Sb1.6Te3 薄膜,以同时调节载流子浓度、塞贝克系数、迁移率和局部应变传播。具体来说,这些薄膜实现了超高功率因数,达到 45 μW cm-1 K-2,并在室温下弯曲 1000 次后显示出适度的电导率变化(<10%)。此外,我们还展示了一种面积达 100 cm2 的大面积、高性价比薄膜和一种柔性发电机,在 56.8 K 的温差条件下,其最大功率密度达到了 69 W m-2。这种柔性 TE 不仅可以作为理解无机 TE 薄膜结构-性能相关性的框架,还可以为可穿戴电子设备和可持续热收集提供可行性。
Scalable and sustainable manufacturing of twin boundary-enhanced flexible Bi0.4Sb1.6Te3 films with high thermoelectric performance
Flexible thermoelectrics (TEs) have been used in self-powered electronics and heat harvesters due to their matchable heat flux values across curved/non-flat interfaces, aiming to achieve a balance between thermoelectricity, flexibility, and scalability. In this work, we constructed Bi0.4Sb1.6Te3 thin films with a high density of annealing twin boundaries to simultaneously modulate the carrier concentration, Seebeck coefficient, mobility, and local strain propagation. Specifically, the thin films achieved an ultrahigh power factor reaching 45 μW cm−1 K−2 and demonstrated modest electrical conductivity variations (<10%) after 1,000 bending cycles at room temperature. Furthermore, we presented a large-area, cost-effective thin film of up to 100 cm2 and a flexible generator with an impressive maximum power density of 69 W m−2 at a temperature difference of 56.8 K. This flexible TE could not only serve as a framework for comprehending the structure-property correlation in inorganic TE thin films but also provide feasibility for wearable electronics and sustainable heat harvesting.
期刊介绍:
Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.