KIT | KIT-Bibliothek | Impressum | Datenschutz

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

Drewes, Jonas; Perdana, Nanda 1; Rogall, Kevin; Hartig, Torge; Elis, Marie; Schürmann, Ulrich; Pohl, Felix; Abdelaziz, Moheb; Strunskus, Thomas; Kienle, Lorenz; Elbahri, Mady; Faupel, Franz; Rockstuhl, Carsten 1,2; Vahl, Alexander
1 Institut für Theoretische Festkörperphysik (TFP), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

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. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000162441
Veröffentlicht am 22.09.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 0934-0866, 0176-2265, 1521-4117
KITopen-ID: 1000162441
HGF-Programm 43.32.02 (POF IV, LK 01) Designed Optical Materials
Erschienen in Particle and Particle Systems Characterization
Verlag John Wiley and Sons
Band 41
Heft 2
Seiten Art.-Nr.: 2300102
Vorab online veröffentlicht am 12.09.2023
Schlagwörter black absorber, gas aggregation source, magnetron sputtering, plasmonic particles, RF sputtering
Nachgewiesen in Scopus
Dimensions
Web of Science
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page