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From Thermoelectric Powder Directly to Thermoelectric Generators : Flexible Bi₂Te₃ Films on Polymer Sheets Prepared by the Powder Aerosol Deposition Method at Room Temperature

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006702
URN to cite this document: urn:nbn:de:bvb:703-epub-6702-1

Title data

Werner, Robin ; Matejka, Johanna S. ; Schönauer-Kamin, Daniela ; Moos, Ralf:
From Thermoelectric Powder Directly to Thermoelectric Generators : Flexible Bi₂Te₃ Films on Polymer Sheets Prepared by the Powder Aerosol Deposition Method at Room Temperature.
In: Energy Technology. Vol. 10 (2022) Issue 5 . - No. 2101091.
ISSN 2194-4296
DOI der Verlagsversion: https://doi.org/10.1002/ente.202101091

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Abstract

The powder aerosol deposition (PAD) method is a spray-coating process to form dense, nanocrystalline ceramic films at room temperature without thermal treatment. Herein, the thermoelectric properties of PAD-deposited Bi2Te3 films are investigated. The powders are deposited on rigid Al2O3 substrates and on flexible polymer sheets (Kapton and Mylar) attached to Kanthal foils. A low thermal conductivity of λ = 0.12 W m−1 K−1, an electrical conductivity of σ = 29.8 S cm−1, and a Seebeck coefficient of S = –145 μV K−1 are determined on Al2O3. To evaluate the flexibility of the Bi2Te3 films deposited on flexible polymer sheets, the electrical conductivity and the Seebeck coefficient are measured before, during, and again after bending. While the Seebeck coefficient remains unaffected by the bending process and the bending radius, the electrical conductivity deteriorates to some extent during bending. Subsequent measurements in the nonbent planar state reveal, however, that the conductivity is restored partially. Furthermore, first, flexible thermoelectric generators could be prepared and characterized. PAD offers enormous potential not only in the combination of Bi2Te3 films on polymer sheets without thermal treatment, but also for manufacturing flexible thermoelectric generators in general.

Further data

Item Type: Article in a journal
Keywords: flexible thermoelectric generators; nanostructured Bi₂Te₃; powder aerosol
deposition method; room-temperature thermoelectric generators
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Units
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-6702-1
Date Deposited: 06 Oct 2022 09:05
Last Modified: 06 Oct 2022 09:05
URI: https://epub.uni-bayreuth.de/id/eprint/6702

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