The photoluminescence (PL) of silver-decorated zinc oxide (ZnO/Ag) nanocolloids synthesized by picosecond laser ablation in water was studied. Compared to ZnO, a significant enhancement of the broad near-ultraviolet PL luminescence peak is observed in the presence of Ag nanoparticles (NPs), as well as changes in the broad multi-component visible emission feature. The comparative discussion of the chemical and structural analyses suggests that the high electric field in proximity of the Ag NPs gives rise to an enhancement of the ZnO exciton oscillator strength. Optical coupling results in the increase of spontaneous emission rate and internal quantum efficiency of the Ag-decorated ZnO nanostructures. The presented results are helpful for the design of innovative and highly performing LED devices with spatially uniform output.

Enhanced optical response of ZnO nanocolloids prepared by a picosecond laser / L., D’Urso; Santangelo, Saveria; S., Spadaro; S., Scibilia; A. M., Mezzasalma; F., Neri; E., Fazio. - In: JOURNAL OF LUMINESCENCE. - ISSN 0022-2313. - 178:(2016), pp. 204-209. [10.1016/j.jlumin.2016.06.002]

Enhanced optical response of ZnO nanocolloids prepared by a picosecond laser

SANTANGELO, Saveria;
2016-01-01

Abstract

The photoluminescence (PL) of silver-decorated zinc oxide (ZnO/Ag) nanocolloids synthesized by picosecond laser ablation in water was studied. Compared to ZnO, a significant enhancement of the broad near-ultraviolet PL luminescence peak is observed in the presence of Ag nanoparticles (NPs), as well as changes in the broad multi-component visible emission feature. The comparative discussion of the chemical and structural analyses suggests that the high electric field in proximity of the Ag NPs gives rise to an enhancement of the ZnO exciton oscillator strength. Optical coupling results in the increase of spontaneous emission rate and internal quantum efficiency of the Ag-decorated ZnO nanostructures. The presented results are helpful for the design of innovative and highly performing LED devices with spatially uniform output.
2016
PULSED LASER ABLATION, ZNO, AG NANOPARTICLES, LOCALIZED SURFACE PLASMONS, ELECTRONIC FIELDS, PL ENHANCEMENT
PLASMON MEDIATED EMISSION, RAMAN SCATTERING, NANOCRYSTALS, PHOTOLUMINESCENCE, FABRICATION, ABLATION; FILMS
File in questo prodotto:
File Dimensione Formato  
D'Urso_2016_JLuminescence_Enhanced_editor.pdf

non disponibili

Descrizione: Articolo principale
Tipologia: Versione Editoriale (PDF)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 704.92 kB
Formato Adobe PDF
704.92 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/6660
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 7
social impact