Cooling-free infrared sensors with high-performance thermoelectric materials

Kotaro Hirose; Masahiro Adachi; Makoto Murata; Yoshiyuki Yamamoto; Tsunehiro Takeuchi

doi:10.1117/12.2541835

31 January 2020 Cooling-free infrared sensors with high-performance thermoelectric materials

Kotaro Hirose, Masahiro Adachi, Makoto Murata, Yoshiyuki Yamamoto, Tsunehiro Takeuchi

Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 112880I (2020) https://doi.org/10.1117/12.2541835
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

For making a high-performance thermopile, which is a kind of cooling-free infrared sensor and composed of thermoelectric materials and capable of detecting infrared rays without electric power, we developed Si-Ge thin film thermoelectric materials. The thermal conductivity of the Si-Ge thermoelectric material was successfully reduced to 1 Wm^-1K^-1 by making use of nano-structuring. Besides, its Seebeck coefficient was effectively increased by a multi element doping technique. The thermopile constructed using the developed nanostructured Si-Ge was confirmed to sensitively detect infrared rays.We constructed gases detection system using the thermopile and an infrared laser and demonstrated its superior function.

Citation Download Citation

Kotaro Hirose, Masahiro Adachi, Makoto Murata, Yoshiyuki Yamamoto, and Tsunehiro Takeuchi "Cooling-free infrared sensors with high-performance thermoelectric materials", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112880I (31 January 2020); https://doi.org/10.1117/12.2541835

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