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Enhancement in UV sensing properties of ZnO:Ag nanostructured films by surface functionalization with noble metalic and bimetallic nanoparticles

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dc.contributor.author POSTICA, Vasile
dc.contributor.author VAHL, Alexander
dc.contributor.author MAGARIU, Nicolae
dc.contributor.author TERASA, Maik-Ivo
dc.contributor.author HOPPE, Mathias
dc.contributor.author VIANA, Bruno
dc.contributor.author ASCHEHOUG, Patrick
dc.contributor.author PAUPORTÉ, Thierry
dc.contributor.author TIGINYANU, Ion
dc.contributor.author POLONSKYI, Oleksandr
dc.contributor.author SONTEA, Victor
dc.contributor.author CHOW, Lee
dc.contributor.author KIENLE, Lorenz
dc.contributor.author ADELUNG, Rainer
dc.contributor.author FAUPEL, Franz
dc.contributor.author LUPAN, Oleg
dc.date.accessioned 2019-02-27T09:22:25Z
dc.date.available 2019-02-27T09:22:25Z
dc.date.issued 2018
dc.identifier.citation POSTICA, Vasile, VAHL, Alexander, MAGARIU, Nicolae et al. Enhancement in uv sensing properties of Zno:Ag nanostructured films by surface functionalization with noble metalic and bimetallic nanoparticles. In: Journal of Engineering Science. 2018, vol. 25(3), pp. 41-51. ISSN 2587-3474. eISSN 2587-3482. en_US
dc.identifier.issn 2587-3474
dc.identifier.issn 2587-3482
dc.identifier.uri http://repository.utm.md/handle/5014/656
dc.identifier.uri https://www.doi.org/10.5281/zenodo.2557280
dc.description.abstract In this study, Ag-doped ZnO (ZnO:Ag) nanostructured films were functionalized with silver nanoparticles (Ag NPs), silver-platinum bimetallic nanoparticles (AgPt NPs) and silver-gold bimetallic NPs (AgAu NPs) using a gas phase PVD process based on a Haberland type gas aggregation cluster source and unipolar DC planar magnetron sputtering. Ultraviolet (UV) sensing investigations showed an respectable time constants reduction for rising and decaying photocurrents, as well as an increase for the UV response. Compared to a pristine nanostructured film the surface functionalization with Ag, AgPt and AgAu increased the UV response by factors of 2.7, 3.5 and 4, respectively. The increased performances of the here presented ZnO:Ag nanostructured films functionalized with monometallic and bimetallic NPs based photodetectors are explained by the increased lifetime of photogenerated electron – hole pairs, as well as the formation of nanoscale Schottky barriers at the interface of Au/ZnO:Ag and Pt/ZnO:Ag. en_US
dc.description.abstract În acest studiu, filmele nanostructurate ZnO (ZnO: Ag) au fost funcționalizate cu nanoparticule de argint (Ag NPs), nanoparticule bimetalice argint-platină (AgPt NPs) și NPuri bimetalice de aur (AgAu NPs) folosind o sursă cluster de agregare de gaz tip Haberland și un pulverizator unipolar planetar magnetron plan. Analiza sensibilității ultraviolete (UV) a arătat o reducere a constantelor de timp pentru fotocurenturile în creștere și degradare, precum și o creștere a răspunsului UV. Comparativ cu un film nanostructurat fără adaosuri, funcționalitatea suprafeței cu Ag, AgPt și AgAu a crescut răspunsul UV cu factori de 2,7; 3,5 și respectiv 4. Performanțele majorate ale filmelor nanostructurate ZnO:Ag, funcționalizate cu fotodetectoare bazate pe NP monometalice și bimetalice se explică prin creșterea duratei de viață a perechilor fotogenerate de electroni, precum și prin formarea barierelor Schottky de scară nanometrică la interfața Au / ZnO: Ag și Pt / ZnO: Ag. ro
dc.language.iso en en_US
dc.publisher Universitatea Tehnică a Moldovei en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject nanostructured films en_US
dc.subject pelicule nanostructurate en_US
dc.title Enhancement in UV sensing properties of ZnO:Ag nanostructured films by surface functionalization with noble metalic and bimetallic nanoparticles en_US
dc.title.alternative Îmbunătîţirea sensiblităţii UV a filmelor nanostructurale ZnO:Ag prin funcţionalizarea suprafeţei cu metale nobile şi nanoparticule bimetalice en_US
dc.type Article en_US


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