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Surface plasmon enhanced blue–green photoluminescence from carbon-rich amorphous silicon carbide films

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
513
Identifiers
DOI: 10.1016/j.jallcom.2011.11.001
Keywords
  • Thin Films
  • Vapor Deposition
  • Optical Properties
  • Luminescence

Abstract

Abstract Surface plasmons (SPs) have been utilized to enhance the luminescence efficiency of light-emitting materials and devices in the past decade. In this work, the enhanced photoluminescence (PL) from carbon-rich amorphous silicon carbide (a-Si 1− x C x :H) films (with a PL peak at ∼480 nm) has been achieved for the first time via coupling with SPs generated at the Ag/a-Si 1− x C x :H interface. The enhancement factor was found to firstly increase with the Ag nanoparticle size, subsequently reach a maximum value of 3.3 when the average Ag nanoparticle size and the surface area coverage of Ag interlayers were 76 nm and 44% respectively, and eventually decrease as the Ag interlayers became continuous. It was found that such enhancement was mainly due to the SPs scattering. Since the carbon-based films have similar microstructure and PL mechanism to those of the carbon-rich a-Si 1− x C x :H films, coupling with SPs has been proven to be a promising way to enhance the light emission from carbon-based films which can also be utilized for the large-area solid-state lighting applications.

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