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Laser-Annealing of Thermoelectric CuFe₀.₉₈Sn₀.₀₂O₂ Films Produced by Powder Aerosol Deposition Method

Title data

Nazarenus, Tobias ; Kita, Jaroslaw ; Moos, Ralf ; Exner, Jörg:
Laser-Annealing of Thermoelectric CuFe₀.₉₈Sn₀.₀₂O₂ Films Produced by Powder Aerosol Deposition Method.
In: Advanced Materials Interfaces. Vol. 7 (2020) Issue 22 . - No. 2001114. - 13 S.
ISSN 2196-7350
DOI: https://doi.org/10.1002/admi.202001114

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Powder aerosol deposition (PAD) is a unique coating method that allows the fabrication of dense ceramic films on a variety of substrates at room temperature. This spraying process can produce film thicknesses of several micrometers within minutes without the use of binders or other liquids. Although the functional properties of the well‐adhering films are already present in the as‐deposited state, the functional film properties are often reduced by several orders of magnitude. To recover bulk‐like values, the samples are typically thermally post‐deposition‐treated in a furnace. In contrast, in this work, the films are locally annealed by a frequency‐tripled Nd:YAG laser (λ = 355 nm). A thermoelectric material, doped copper delafossite, is sprayed via PAD and the influence of frequency‐tripled Nd:YAG laser irradiation on the electronic and morphological film properties is investigated in detail. A very thin, glass‐like surface layer forms whose electronic conductivity is three orders of magnitude higher than in the as‐deposited state. This is proven by electrical impedance spectroscopy, microscopic images, and FEA‐simulations.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: post-deposition laser-annealing; powder aerosol deposition; room temperature impact consolidation; thermoelectric films
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
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 02 Dec 2020 13:19
Last Modified: 16 Feb 2021 10:25
URI: https://eref.uni-bayreuth.de/id/eprint/60654