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\hbox {Bi}_{2}\hbox {Te}_{3} -Based Flexible Micro Thermoelectric Generator With Optimized Design

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4 Author(s)

We demonstrate and discuss the performance of fully integrated and flexible micro thermoelectric generators (muTEGs). The devices are fabricated with a low-cost microfabrication process based on electrochemical deposition of a thermoelectric material into a polymer mold. Overall system optimization is demonstrated by means of NiCu and p- and n-type Bi2Te3-based muTEGs . Influences of design, material, fabrication, and performance parameters on device performance are explained by means of measurements and model calculations. The fabricated devices generate up to 2.6*10-3muWldrcm-2ldrK-2 for devices with NiCu thermocouples and up to 0.29 muWldrcm-2ldrK-2 for Bi2Te3-based generators in planar state. Mechanical testing on NiCu muTEGs demonstrated functionality of the generator when bent to curvatures down to 7.5 mm. This allows for enhanced thermal contact to nonplanar surfaces.

Published in:

Microelectromechanical Systems, Journal of  (Volume:18 ,  Issue: 3 )

Date of Publication:

June 2009

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