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High-throughput physical vapour deposition flexible thermoelectric generators.

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 per pair and P = 0.2 nW per pair for a 20 °C temperature difference.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Morgan KA,Tang T,Zeimpekis I,Ravagli A,Craig C,Yao J,Feng Z,Yarmolich D,Barker C,Assender H,Hewak DW

doi

10.1038/s41598-019-41000-y

subject

Has Abstract

pub_date

2019-03-13 00:00:00

pages

4393

issue

1

issn

2045-2322

pii

10.1038/s41598-019-41000-y

journal_volume

9

pub_type

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