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High-throughput physical vapour deposition flexible thermoelectric generators

High-throughput physical vapour deposition flexible thermoelectric generators
High-throughput physical vapour deposition flexible thermoelectric generators
Flexible thermoelectric generators (TEGs) can provide uninterrupted, green energy from body-heat, overcoming bulky battery configurations that limit the wearable-technologies market today. High-throughput production of flexible TEGs is currently dominated by printing techniques, limiting material choices and performance. This work investigates the compatibility of physical vapour deposition (PVD) techniques with a flexible commercial process, roll-to-roll (R2R), for thermoelectric applications. We demonstrate, on a flexible polyimide substrate, a sputtered Bi2Te3/GeTe TEG with Seebeck coefficient (S) of 140 μV/K per pair and output power (P) of 0.4 nW per pair for a 20 °C temperature difference. For the first time, thermoelectric properties of R2R sputtered Bi2Te3 films are reported and we demonstrate the ability to tune the power factor by lowering run times, lending itself to a high-speed low-cost process. To further illustrate this high-rate PVD/R2R compatibility, we fabricate a TEG using Virtual Cathode Deposition (VCD), a novel high deposition rate PVD tool, for the first time. This Bi2Te3/Bi0.5Sb1.5Te3 TEG exhibits S=250 μV/K and P=0.2 nW per pair for a 20 °C temperature difference.
2045-2322
1-9
Morgan, Katrina
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Tang, Tian
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Zeimpekis, Ioannis
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Ravagli, Andrea
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Craig, Christopher
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Yao, Jin
83dff1cd-6f7c-4b47-968e-18c64ffcb24b
Feng, Zhuo
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Yarmolich, Dmitry
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Barker, Clara
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Assender, Hazel
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Hewak, Daniel
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Morgan, Katrina
2b9605fc-ac61-4ae7-b5f1-b6e3d257701d
Tang, Tian
f286e72c-deac-482f-8ef3-b629dc8a734f
Zeimpekis, Ioannis
a2c354ec-3891-497c-adac-89b3a5d96af0
Ravagli, Andrea
36bc59df-8134-42d1-9871-bcf7bab6539a
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Yao, Jin
83dff1cd-6f7c-4b47-968e-18c64ffcb24b
Feng, Zhuo
cd51c72a-9ae9-452d-87ba-62520081e90a
Yarmolich, Dmitry
cf3d9754-68d4-45d7-9531-55fd7e89bb87
Barker, Clara
b3c8de29-2501-445a-9e1f-86509893e69c
Assender, Hazel
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Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0

Morgan, Katrina, Tang, Tian, Zeimpekis, Ioannis, Ravagli, Andrea, Craig, Christopher, Yao, Jin, Feng, Zhuo, Yarmolich, Dmitry, Barker, Clara, Assender, Hazel and Hewak, Daniel (2019) High-throughput physical vapour deposition flexible thermoelectric generators. Scientific Reports, 9, 1-9. (doi:10.1038/s41598-019-41000-y).

Record type: Article

Abstract

Flexible thermoelectric generators (TEGs) can provide uninterrupted, green energy from body-heat, overcoming bulky battery configurations that limit the wearable-technologies market today. High-throughput production of flexible TEGs is currently dominated by printing techniques, limiting material choices and performance. This work investigates the compatibility of physical vapour deposition (PVD) techniques with a flexible commercial process, roll-to-roll (R2R), for thermoelectric applications. We demonstrate, on a flexible polyimide substrate, a sputtered Bi2Te3/GeTe TEG with Seebeck coefficient (S) of 140 μV/K per pair and output power (P) of 0.4 nW per pair for a 20 °C temperature difference. For the first time, thermoelectric properties of R2R sputtered Bi2Te3 films are reported and we demonstrate the ability to tune the power factor by lowering run times, lending itself to a high-speed low-cost process. To further illustrate this high-rate PVD/R2R compatibility, we fabricate a TEG using Virtual Cathode Deposition (VCD), a novel high deposition rate PVD tool, for the first time. This Bi2Te3/Bi0.5Sb1.5Te3 TEG exhibits S=250 μV/K and P=0.2 nW per pair for a 20 °C temperature difference.

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s41598-019-41000-y - Version of Record
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More information

Accepted/In Press date: 25 February 2019
e-pub ahead of print date: 13 March 2019

Identifiers

Local EPrints ID: 428853
URI: https://eprints.soton.ac.uk/id/eprint/428853
ISSN: 2045-2322
PURE UUID: b4737ac9-f5db-4515-840d-d16b282f95d3
ORCID for Katrina Morgan: ORCID iD orcid.org/0000-0002-8600-4322
ORCID for Christopher Craig: ORCID iD orcid.org/0000-0001-6919-4294
ORCID for Daniel Hewak: ORCID iD orcid.org/0000-0002-2093-5773

Catalogue record

Date deposited: 13 Mar 2019 17:32
Last modified: 20 Aug 2019 00:39

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