Geometrical Optimization and Transverse Thermoelectric Performances of Fe/Bi2Te2.7Se0.3 Artificially Tilted Multilayer Thermoelectric Devices

Hongyu Zhou; Huang Liu; Guoping Qian; Huanan Yu; Xiangbing Gong; Xi Li; Jianlong Zheng

doi:10.3390/mi13020233

Geometrical Optimization and Transverse Thermoelectric Performances of Fe/Bi₂Te_2.7Se_0.3 Artificially Tilted Multilayer Thermoelectric Devices

Micromachines (Basel). 2022 Jan 30;13(2):233. doi: 10.3390/mi13020233.

Authors

Hongyu Zhou¹, Huang Liu¹, Guoping Qian¹, Huanan Yu¹, Xiangbing Gong¹, Xi Li¹, Jianlong Zheng¹

Affiliation

¹ National Engineering Laboratory for Highway Maintenance Technology, School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China.

Abstract

Transverse thermoelectric performance of the artificially tilted multilayer thermoelectric device (ATMTD) is very difficult to be optimized, due to the large degree freedom in device design. Herein, an ATMTD with Fe and Bi₂Te_2.7Se_0.3 (BTS) materials was proposed and fabricated. Through high-throughput calculation of Fe/BTS ATMTD, a maximum of calculated transverse thermoelectric figure of merit of 0.15 was obtained at a thickness ratio of 0.49 and a tilted angle of 14°. For fabricated ATMTD, the whole Fe/BTS interface is closely connected with a slight interfacial reaction. The optimizing Fe/BTS ATMTD with 12 mm in length, 6 mm in width and 4 mm in height has a maximum output power of 3.87 mW under a temperature difference of 39.6 K. Moreover the related power density per heat-transfer area reaches 53.75 W·m^-2. This work demonstrates the performance of Fe/BTS ATMTD, allowing a better understanding of the potential in micro-scaled devices.

Keywords: Fe/Bi2Te2.7Se0.3; rational design; transverse thermoelectric performances.

Abstract

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