热电效应
热电发电机
材料科学
数码产品
塞贝克系数
光电子学
热电材料
溅射沉积
电气工程
可穿戴计算机
工程物理
纳米技术
薄膜
溅射
复合材料
计算机科学
工程类
嵌入式系统
物理
热导率
热力学
作者
Qi Zou,Hongjing Shang,Daxing Huang,Bowei Xie,Lin Zhang,Kai Wang,Hao Dong,Congmeng Li,Hongwei Gu,Fazhu Ding
摘要
The rapid development of the Internet of Things increases the demand for wearable devices. Compared with traditional chemical batteries, flexible thermoelectric technology contributes a solution for solving the power supply of wearable electronics. Here, we prepared n-type Bi2Te3 and p-type Bi0.5Sb1.5Te3 flexible thermoelectric films by the magnetron sputtering method, where the thermoelectric performance and their microstructures are systematically studied. The carrier concentration and mobility are optimized by adjusting the deposition temperature, eventually improving the thermoelectric performance and achieving the room-temperature power factors of 3.2 and 6.1 μW cm−1 K−2 for Bi2Te3 and Bi0.5Sb1.5Te3 films, respectively. Furthermore, after being bent 900 times with a radius of 5 mm, the resistance of these films barely increases, demonstrating the great potential for applications in wearable electronics. In order to further evaluate the practicability, these films are used to design a flexible thermoelectric generator, in which output performance improves with the increase in the temperature difference. The power density is up to ∼218.8 μW cm−2 at temperature differences of ∼41 K.
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