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Series in Microelectronics
edited by Qiuting Huang
Mathieu Maurice Luisier
Thermoelectric Characterization of InAs Nanowires.
2016. XVI, 148 pages. EUR 64,00.
Thermoelectric energy conversion offers a wide field of applications that range from thermoelectric cooling over waste heat recovery of combustion engines to energy harvesting for wearable devices. Thin nanowires are promising candidates for a high thermoelectric figure of merit ZT = σS2 / λ with electrical conductivity σ, Seebeck coefficient S and thermal conductivity λ. The work of this thesis focuses on the fabrication of thermoelectric test structures and the investigation of thermoelectric properties of thin Indium Arsenide nanowires. The thermal conductivity is measured using a self-heating technique and determined to be reduced by more than a factor of 10 compared to bulk InAs. Gated measurements of σ and S allow to extract the charge carrier concentration and the charge carrier mobility of the nanowires. Furthermore, it is shown that 20 nm thick Indium Arsenide nanowires show an enhanced thermoelectric power factor σS2 compared to thicker nanowires due to their one-dimensional behavior.
About the Author
Philipp Mensch was born in Ulm, Germany, in 1986. He received his master degree in physics from the ETH Zurich, Switzerland, in 2011. In the same year, he started his doctoral studies jointly at IBM Research - Zurich and at the Integrated Systems Laboratory of the ETH Zurich, working on thermoelectric energy conversion using III-V nanowire structures.
Keywords: Thermoelectric energy conversion, thermoelectric cooling, waste heat recovery, nanowire, InAs, electrical conductivity, thermal conductivity, thermoelectric power factor.
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