Microstructure-induced novel white photoluminescence from rapid-thermal-annealed two-layer Si/C on Si(1 0 0) with nanocomposite Si, SiC and C nanocrystals

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Abstract

A novel broad visible photoluminescence (PL) material has been demonstrated from rapid-thermal-annealed two-layer Si/C films on Si(1 0 0). The asymmetric broad PL peak covered wavelengths of 350-750 nm. The wide visible PL spectrum can be deconvoluted into four bands of blue (∼420 nm), green (∼490 nm), green-yellow (∼550 nm) and orange (∼650 nm) emission, corresponding to emission from SiC nanocrystals, sp2 carbon clusters, c-SiC nanoparticles and Si nanocrystals, respectively. The detailed mechanism of broad photoluminescence was proposed in terms of microstructure evolution.

Original languageEnglish
Pages (from-to)432-435
Number of pages4
JournalScripta Materialia
Volume65
Issue number5
DOIs
Publication statusPublished - 2011 Sep 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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