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Coupled Thermoelectric and Piezoelectric Meta Structures for Renewable Energy Generation

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title
Coupled Thermoelectric and Piezoelectric Meta Structures for Renewable Energy Generation
author
Montgomery, David
abstract
This work focuses on the combination of thermoelectric and piezoelectric materials into a new hybrid generator. It was discovered that a hybrid thermoelectric piezoelectric generator results in a meta-structure that creates a coupling field effect at the interface between the thermoelectric and piezoelectric films that produces more power than the sum of the individual generators. This coupling field effect causes a modification of the thermoelectric properties producing an observed 468% increase in total power output. In addition to this coupling effect, the first functional thermoelectric and piezoelectric generator design is presented. This is achieved by integrating a flexible continuous alternating p- and n-type semiconductor thermoelectric generator into the electrode of the piezoelectric film. This design overcomes major issues previously preventing the two materials to be combined in a single generator architecture. This functional thermoelectric piezoelectric generator can achieve 89% of the theoretical thermoelectric power and 540% increase in the piezoelectric power due to the geometry of the structure. A spray doping synthesis method is presented that was used to create the continuous alternating p- and n-type semiconductor film. Spray doping achieves that same thermoelectric properties of solution doping but greatly simplifies the fabrication of a thermoelectric generator. Finally an optimized thermoelectric generator is presented that overcomes many of the current issues plaguing other thin film designs. The optimized structure is robust and is compatible with a numerous synthesis methods and materials used in thin film thermoelectrics.
subject
Nanoparticles
Piezoelectric
Pyroelectric
Renewable Energy Generators
Thermoelectric
Wearable Electronics
contributor
Carroll, David L (committee chair)
Lachgar, Abdessadek (committee member)
Guthold, Martin (committee member)
Jurchescu, Oana D (committee member)
Williams, Richard T (committee member)
date
2018-05-24T08:36:01Z (accessioned)
2019-05-23T08:30:13Z (available)
2018 (issued)
degree
Physics (discipline)
embargo
2019-05-23 (terms)
identifier
http://hdl.handle.net/10339/90703 (uri)
language
en (iso)
publisher
Wake Forest University
type
Dissertation

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