Understanding the interaction between plasmonic nanoparticles and transparent conductive oxides is instrumental to the development of next-generation photovoltaic, optoelectronic, and energy-efficient solid-state lighting devices. We investigated the optical response of hybrid media composed of gold nanoparticles deposited on aluminum-doped zinc oxide thin films with varying doping concentration by spectroscopic ellipsometry. The dielectric functions of bare AZO were addressed first, revealing doping-induced effects such as the band gap shift and the appearance of free carriers. In the hybrid media, a blue-shift of the localized surface plasmon resonance of Au NPs as a function of increasing Al doping of the substrate was observed, ascribed to the occurrence of a charge transfer between the two materials and the doping-dependent variation of the polarizability of the substrate.

Doping-Dependent Optical Response of a Hybrid Transparent Conductive Oxide/Plasmonic Medium / Sygletou, Maria; Benedetti, Stefania; DI BONA, Alessandro; Canepa, Maurizio; Bisio, Francesco. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - 126:4(2022), pp. 1881-1889. [10.1021/acs.jpcc.1c07567]

Doping-Dependent Optical Response of a Hybrid Transparent Conductive Oxide/Plasmonic Medium

Stefania Benedetti;Alessandro di Bona;Maurizio Canepa;
2022

Abstract

Understanding the interaction between plasmonic nanoparticles and transparent conductive oxides is instrumental to the development of next-generation photovoltaic, optoelectronic, and energy-efficient solid-state lighting devices. We investigated the optical response of hybrid media composed of gold nanoparticles deposited on aluminum-doped zinc oxide thin films with varying doping concentration by spectroscopic ellipsometry. The dielectric functions of bare AZO were addressed first, revealing doping-induced effects such as the band gap shift and the appearance of free carriers. In the hybrid media, a blue-shift of the localized surface plasmon resonance of Au NPs as a function of increasing Al doping of the substrate was observed, ascribed to the occurrence of a charge transfer between the two materials and the doping-dependent variation of the polarizability of the substrate.
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Doping-Dependent Optical Response of a Hybrid Transparent Conductive Oxide/Plasmonic Medium / Sygletou, Maria; Benedetti, Stefania; DI BONA, Alessandro; Canepa, Maurizio; Bisio, Francesco. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - 126:4(2022), pp. 1881-1889. [10.1021/acs.jpcc.1c07567]
Sygletou, Maria; Benedetti, Stefania; DI BONA, Alessandro; Canepa, Maurizio; Bisio, Francesco
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1284345
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