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New frontier in printed thermoelectrics: Formation of β-Ag$_{2}$Se through thermally stimulated dissociative adsorption leads to high ZT

Mallick, Md Mofasser; Rösch, Andres Georg; Franke, Leonard; Gall, Andre; Ahmad, Sarfraz; Gesswein, Holger; Mazilkin, Andrey; Kuebel, Christian; Lemmer, Uli

Abstract:
Printed thermoelectrics (TE) could significantly reduce the production cost of energy harvesting devices by large-scale manufacturing. However, developing a high performance printable TE material is a substantial challenge. In this work, a new one-pot synthesis and processing of high performance Ag$_{2}$Se based n-type printed TE materials is reported. Structural analyses reveal that orthorhombic β-Ag$_{2}$Se is the dominant phase in the n-type printed material compounds. For a printed material at room temperature, a breakthrough power-factor of ∼17 μW cm$^{-1}$ K$^{-2}$ with a record high figure-of-merit ZT ∼ 1.03 is achieved. A high average ZT, an important parameter for device applications, of ∼0.85–0.60 has been realized in the temperature range of 300 K to 400 K. Using this material for n-type legs in combination with commercially available PEDOT:PSS for p-type legs, a printed TE generator (print-TEG) of two thermocouples has been fabricated. An output voltage of 17.6 mV and a high maximum power output P$_{max}$ of 0.19 μW are achieved using the print-TEG at ΔT = 75 K.

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Verlagsausgabe §
DOI: 10.5445/IR/1000122115
Veröffentlicht am 02.10.2020
Originalveröffentlichung
DOI: 10.1039/D0TA05859A
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Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Energiespeichersysteme (IAM-ESS)
Institut für Mikrostrukturtechnik (IMT)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2050-7488, 2050-7496
KITopen-ID: 1000122115
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in Journal of materials chemistry / A
Verlag Royal Society of Chemistry (RSC)
Band 8
Heft 32
Seiten 16366-16375
Projektinformation 3DMM2O (ZEISS-STFG, 43125 (intern))
EXC 2082; 3DMM2O (DFG, DFG EXSTRAT, EXC 2082/1, zu FOR_APH_20_03_25+08-58-20)
Vorab online veröffentlicht am 17.07.2020
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