Co‐sputtering of A Thin Film Broadband Absorber Based on Self‐Organized Plasmonic Cu Nanoparticles

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL Particle & Particle Systems Characterization Pub Date : 2023-09-12 DOI:10.1002/ppsc.202300102
Jonas Drewes, Nanda Perdana, Kevin Rogall, Torge Hartig, Marie Elis, Ulrich Schürmann, Felix Pohl, Moheb Abdelaziz, Thomas Strunskus, Lorenz Kienle, Mady Elbahri, Franz Faupel, Carsten Rockstuhl, Alexander Vahl
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Abstract

Abstract The efficient conversion of solar energy to heat is a prime challenge for solar thermal absorbers, and various material classes and device concepts are discussed. One exciting class of solar thermal absorbers are plasmonic broadband absorbers that rely on light absorption thanks to plasmonic resonances sustained in metallic nanoparticles. This work focuses on Cu/Al 2 O 3 plasmonic absorbers, which consist of a thin film stack of a metallic Cu‐mirror, a dielectric Al 2 O 3 spacer, and an Al 2 O 3 /Cu‐nanoparticle nanocomposite. This work explores two preparation routes for the Al 2 O 3 /Cu‐nanoparticle nanocomposite, which rely on the self‐organization of Cu nanoparticles from sputtered atoms, either in the gas phase (i.e., via gas aggregation source) or on the thin film surface (i.e., via simultaneous co‐sputtering). While in either case, Cu‐Al 2 O 3 ‐Al 2 O 3 /Cu absorbers with a low reflectivity over a broad wavelength regime are obtained, the simultaneous co‐sputtering approach enabled better control over the film roughness and showed excellent agreement with dedicated simulations of the optical properties of the plasmonic absorber using a multi‐scale modeling approach. Upon variation of the thickness and filling factor of the Al 2 O 3 /Cu nanocomposite layer, the optical properties of the plasmonic absorbers are tailored, reaching an integrated reflectance down to 0.17 (from 250 to 1600 nm).
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基于自组织等离子体铜纳米粒子的薄膜宽带吸收体的Co -溅射
摘要:如何有效地将太阳能转化为热能是太阳能热吸收器面临的主要挑战,本文讨论了各种材料类别和设备概念。一类令人兴奋的太阳能热吸收器是等离子体宽带吸收器,它依靠金属纳米颗粒中持续的等离子体共振来吸收光。这项工作的重点是Cu/ al2o3等离子体吸收剂,它由金属Cu -镜面的薄膜堆叠、电介质al2o3间隔层和al2o3 /Cu -纳米颗粒纳米复合材料组成。这项工作探索了两种制备Al 2o3 /Cu纳米颗粒纳米复合材料的途径,它们依赖于溅射原子的Cu纳米颗粒的自组织,要么在气相(即通过气体聚集源),要么在薄膜表面(即通过同时共溅射)。虽然在这两种情况下,Cu - al2o3 - al2o3 /Cu吸收剂在宽波长范围内具有低反射率,但同时共溅射方法能够更好地控制薄膜粗糙度,并与使用多尺度建模方法对等离子体吸收剂光学特性的专门模拟显示出极好的一致性。随着Al 2o3 /Cu纳米复合层厚度和填充系数的变化,等离子体吸光体的光学性能得到调整,其综合反射率可达0.17 (250 ~ 1600 nm)。
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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