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Laser‐Annealing of Thermoelectric CuFe0.98Sn0.02O2 Films Produced by Powder Aerosol Deposition Method
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-10-05 , DOI: 10.1002/admi.202001114 Tobias Nazarenus 1 , Jaroslaw Kita 1 , Ralf Moos 1 , Jörg Exner 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-10-05 , DOI: 10.1002/admi.202001114 Tobias Nazarenus 1 , Jaroslaw Kita 1 , Ralf Moos 1 , Jörg Exner 1
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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.
中文翻译：
粉末气溶胶沉积法制备的热电CuFe0.98Sn0.02O2薄膜的激光退火
粉末气溶胶沉积（PAD）是一种独特的涂覆方法，可以在室温下在各种基材上制造致密的陶瓷膜。这种喷涂过程可在数分钟内产生几微米的膜厚，而无需使用粘合剂或其他液体。尽管良好附着的薄膜的功能特性已经处于沉积状态，但功能薄膜的特性通常会降低几个数量级。为了恢复大块样的值，通常在炉子中对样品进行热处理。相反，在这项工作中，通过三倍频的Nd：YAG激光对薄膜进行局部退火（λ =355 nm）。通过PAD喷涂了一种热电材料，掺杂的铜铜铁矿，并研究了三倍频Nd：YAG激光辐照对电子和形貌薄膜性能的影响。形成非常薄的玻璃状表面层，其电导率比沉积状态高三个数量级。电阻抗光谱学，显微图像和FEA模拟证明了这一点。
更新日期：2020-11-21
中文翻译：
粉末气溶胶沉积法制备的热电CuFe0.98Sn0.02O2薄膜的激光退火
粉末气溶胶沉积（PAD）是一种独特的涂覆方法，可以在室温下在各种基材上制造致密的陶瓷膜。这种喷涂过程可在数分钟内产生几微米的膜厚，而无需使用粘合剂或其他液体。尽管良好附着的薄膜的功能特性已经处于沉积状态，但功能薄膜的特性通常会降低几个数量级。为了恢复大块样的值，通常在炉子中对样品进行热处理。相反，在这项工作中，通过三倍频的Nd：YAG激光对薄膜进行局部退火（λ =355 nm）。通过PAD喷涂了一种热电材料，掺杂的铜铜铁矿，并研究了三倍频Nd：YAG激光辐照对电子和形貌薄膜性能的影响。形成非常薄的玻璃状表面层，其电导率比沉积状态高三个数量级。电阻抗光谱学，显微图像和FEA模拟证明了这一点。
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