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High-Performance Ag-Se-Based n-Type Printed Thermoelectric Materials for High Power Density Folded Generators

  • High-performance Ag–Se-based n-type printed thermoelectric (TE) materials suitable for room-temperature applications have been developed through a new and facile synthesis approach. A high magnitude of the Seebeck coefficient up to 220 μV K–1 and a TE power factor larger than 500 μW m–1 K–2 for an n-type printed film are achieved. A high figure-of-merit ZT ∼0.6 for a printed material has beenHigh-performance Ag–Se-based n-type printed thermoelectric (TE) materials suitable for room-temperature applications have been developed through a new and facile synthesis approach. A high magnitude of the Seebeck coefficient up to 220 μV K–1 and a TE power factor larger than 500 μW m–1 K–2 for an n-type printed film are achieved. A high figure-of-merit ZT ∼0.6 for a printed material has been found in the film with a low in-plane thermal conductivity κF of ∼0.30 W m–1 K–1. Using this material for n-type legs, a flexible folded TE generator (flexTEG) of 13 thermocouples has been fabricated. The open-circuit voltage of the flexTEG for temperature differences of ΔT = 30 and 110 K is found to be 71.1 and 181.4 mV, respectively. Consequently, very high maximum output power densities pmax of 6.6 and 321 μW cm–2 are estimated for the temperature difference of ΔT = 30 K and ΔT = 110 K, respectively. The flexTEG has been demonstrated by wearing it on the lower wrist, which resulted in an output voltage of ∼72.2 mV for ΔT ≈ 30 K. Our results pave the way for widespread use in wearable devices.show moreshow less

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Metadaten
Author:Mofasser Mallick, Andres Georg Rösch, Leonard Franke, Sarfraz Ahmed, Andre Gall, Jasmin Aghassi-HagmannORCiDGND, Holger Geßwein, Uli Lemmer
Creating Corporation:American Chemical Society
Place of publication:Washington, DC
Year of Publication:2020
Language:English
Parent Title (English):ACS Applied Materials & Interfaces
Volume:12
Issue:17
ISSN:1944-8244 (Print)
ISSN:1944-8252 (Online)
First Page:19655
Last Page:19663
Document Type:Article (reviewed)
Institutes:Bibliografie
Open Access:Zugriffsbeschränkt
Release Date:2020/12/14
Licence (German):License LogoEs gilt das UrhG
DOI:https://doi.org/10.1021/acsami.0c01676