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Title: Surface plasmon resonance in nanostructured Ag incorporated ZnS films

Silver incorporated zinc sulfide thin films are prepared by RF magnetron sputtering technique and the influence of silver incorporation on the structural, optical and luminescence properties is analyzed using techniques like grazing incidence X-Ray diffraction (GIXRD), atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), micro-Raman spectroscopy, UV-Vis spectroscopy and laser photoluminescence spectroscopy. XRD analysis presents hexagonal wurtzite structure for the films. A reduction of crystallinity of the films is observed due to Ag incorporation. The Raman spectral analysis confirms the reduction of crystallinity and increase of strain due to the Ag incorporation. AFM analysis reveals a rough surface morphology for the undoped film and Ag incorporation makes the films uniform, dense and smooth. A blue shift of band gap energy with increase in Ag incorporation is observed due to quantum confinement effect. An absorption band (450-650 nm region) due to surface plasmon resonance of the Ag clusters present in the ZnS matrix is observed for the samples with higher Ag incorporation. The complex dielectric constant, loss factor and distribution of volume and surface energy loss of the ZnS thin films are calculated. Laser photoluminescence measurements gives an intense bluish green emission from themore » ZnS films and a quenching of the PL emission is observed which can be due to the metal plasmonic absorption and non-radiative energy transfer due to Ag incorporation.« less
Authors:
;  [1] ;  [2]
  1. Department of Optoelectronics, University of Kerala, Kariavattom, Thiruvananthapuram– 695581, Kerala (India)
  2. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore- 452017, Madhyapradesh (India)
Publication Date:
OSTI Identifier:
22492149
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ATOMIC FORCE MICROSCOPY; ENERGY TRANSFER; FIELD EMISSION; NANOSTRUCTURES; PERMITTIVITY; PHOTOLUMINESCENCE; RAMAN SPECTROSCOPY; REDUCTION; SCANNING ELECTRON MICROSCOPY; SILVER; SPUTTERING; STRAINS; SURFACE ENERGY; SURFACES; THIN FILMS; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY; ZINC SULFIDES