热电效应
塞贝克系数
材料科学
兴奋剂
电导率
热导率
电阻率和电导率
热电材料
薄膜
半导体
光电子学
等离子体
纳米技术
电气工程
复合材料
化学
热力学
物理化学
物理
工程类
量子力学
作者
Zhenyu Hu,Dan Zhao,Yuheng Li,Xin Lv,Jiangfeng Song,Lingyi Meng,Shui‐Yang Lien,Peng Gao
出处
期刊:ACS materials letters
[American Chemical Society]
日期:2023-10-11
卷期号:5 (11): 2987-2999
被引量:5
标识
DOI:10.1021/acsmaterialslett.3c00700
摘要
The demand for a sustainable power supply and management has become increasingly essential with the rise of Internet of Things (IoT) devices and the associated wireless sensor networks. Inorganic thermoelectric thin films, such as those based on Bi2S3, are becoming a viable solution to this issue as they are low-toxic, inexpensive, and possess a high Seebeck coefficient and low thermal conductivity. However, they usually suffer from an inherent low electrical conductivity. In this study, we tackled this problem by incorporating Cl into Bi2S3 lattices using a solution process, resulting in a substantial increase in both the conductivity and carrier concentration. Additionally, DFT calculations show that the doping of Cl leads to the formation of a degenerate semiconductor, which increases conductivity. Moreover, a high power factor of 121.88 μW m–1 K–2 was achieved after doping before plasma treatment. Specifically, the Bi2S3 sample doped with 0.5 mmol of BiCl3 with plasma treatment achieved a remarkable conductivity of 100.72 S cm–1, among the highest reported for a Bi2S3-based system, which is attributed to the sharp increase of carrier concentration. This research demonstrates a promising approach for overcoming the inherently low conductivity of Bi2S3-based thermoelectric thin films to enable them as a viable solution for low-cost power supply in IoT applications.
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