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Thermoelectric Characterization and Power Generation Using a Silicon-on-Insulator Substrate

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7 Author(s)
Lee, Jaeho ; Dept. of Mech. Eng., Stanford Univ., Stanford, CA, USA ; SangBum Kim ; Marconnet, A. ; in 't Zandt, M.A.A.
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We demonstrate techniques for measuring thermoelectric voltages and generating on-chip power using a silicon-on-insulator substrate. Our design uses lateral heat conduction in the silicon overlayer to establish temperature gradients, which dramatically reduces microfabrication complexity compared to competing designs based on a free-standing membrane. This letter characterizes the thermoelectric power of a metal-semiconductor structure involving a doped SbTe alloy that is relevant for phase-change memory. The thermoelectric power of the SbTe-TiW thermocouple is 24 μV/K, and the power generation output achieves up to 0.56 μW/cm2 with a temperature gradient of 18°K.

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Microelectromechanical Systems, Journal of  (Volume:21 ,  Issue: 1 )