Study on the thermoelectric properties of porous Bi-Te films deposited using thermal evaporation on AAO template

被引：8
作者：
Liu, Shiying [1 ]
Li, Guojian [1 ]
Lan, Mingdi [1 ,2 ]
Piao, Yongjun [1 ,3 ]
Zhang, Yanan [1 ]
Wang, Qiang [1 ]
机构：
[1] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Sch Met, Shenyang 110819, Liaoning, Peoples R China
[3] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
来源：
CURRENT APPLIED PHYSICS | 2020年 / 20卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Thermoelectric film; Nanopore; Temperature difference; Thermal evaporation; BI2TE3; THIN-FILMS; ANNEALING TEMPERATURE; BISMUTH TELLURIDE; P-TYPE; OPTIMIZATION;
D O I：
10.1016/j.cap.2019.12.010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The application of thermoelectric films is limited to retain the temperature gradient. In this study, the Bi-Te films are deposited on the AAO template with a pore size of 100 nm using thermal evaporation. The results show that the conductive types of the Bi-Te film are tuned by source temperature. The power factor of the p-type porous film decreases 36% by comparing to that of the p-type nonporous film (1020 mu W/mK(2) at 250 degrees C). Meanwhile, the temperature difference in the porous device is maintained and is approximately 5.0 degrees C. Thus, the maximum output power is achieved in the porous device (about 25 pW), which is 5 times higher than that of the nonporous device. This provides a method to improve the conversion efficiency of thermoelectric film device by maintaining the temperature difference by using porous structure.
引用
收藏
页码：400 / 405
页数：6
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