热电效应
材料科学
薄膜
退火(玻璃)
兴奋剂
结晶度
塞贝克系数
光电子学
化学气相沉积
热电材料
纳米技术
复合材料
热导率
热力学
物理
作者
Xiaoyu Sun,Shuaihang Hou,Zuoxu Wu,Jian Wang,Youwei Qiao,Zunqian Tang,Xingjun Liu,Jun Mao,Qian Zhang,Feng Cao
摘要
The thermoelectric film has broad application potential in the self-power supply of miniature electrical equipment. In this work, GeTe thermoelectric films were prepared using physical vapor deposition combined with annealing processes. Benefitting from the high mobility enabled by the increased crystallinity and the optimized carrier concentration via Ge self-doping, the power factor of a GeTe thin film was significantly improved to 18 μW cm−1 K−2 (300 K), and the maximum one (28 μW cm−1 K−2) was achieved at 576 K. Furthermore, thermoelectric thin film devices assembled with high-performance GeTe films exhibited superior output performance at a temperature difference of 40 K. The maximum open circuit voltage reached 12.2 mV and the power density was 2.4 mW cm−2, indicating that GeTe thin films have broad application prospects in the field of self-power supply.
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