TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Mallick, Mofasser
A1  - Rösch, Andres Georg
A1  - Franke, Leonard
A1  - Ahmed, Sarfraz
A1  - Gall, Andre
A1  - Aghassi-Hagmann, Jasmin
A1  - Geßwein, Holger
A1  - Lemmer, Uli
T1  - High-Performance Ag-Se-Based n-Type Printed Thermoelectric Materials for High Power Density Folded Generators
JF  - ACS Applied Materials & Interfaces
N2  - 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 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.
Y1  - 2020
SN  - 1944-8244 (Print)
SS  - 1944-8244 (Print)
SN  - 1944-8252 (Online)
SS  - 1944-8252 (Online)
U6  - https://doi.org/10.1021/acsami.0c01676
DO  - https://doi.org/10.1021/acsami.0c01676
VL  - 12
IS  - 17
SP  - 19655
EP  - 19663
CY  - Washington, DC
ER  -