Light emission from intrinsic and doped silicon-rich silicon oxide: from the visible to 1.6 μm

L. Tsybeskov, K. L. Moore, P. M. Fauchet, D. G. Hall

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Silicon-rich silicon oxide (SRSO) films were prepared by thermal oxidation (700°C-950°C) of electrochemically etched crystalline silicon (c-Si). The annealing-oxidation conditions are responsible for the chemical and structural modification of SRSO as well as for the intrinsic light-emission in the visible and near infra-red spectral regions (2.0-1.8 eV, 1.6 eV and 1.1 eV). The extrinsic photoluminescence (PL) is produced by doping (via electroplating or ion implantation) with rare-earth (R-E) ions (Nd at 1.06 μm, Er at 1.5 μm) and chalcogens (S at approx. 1.6 μm). The impurities can be localized within the Si grains (S), in the SiO matrix (Nd, Er) or at the Si-SiO interface (Er). The Er-related PL in SRSO was studied in detail: the maximum PL external quantum efficiency (EQE) of 0.01-0.1% was found in samples annealed at 900°C in diluted oxygen (approx. 10% in N2). The integrated PL temperature dependence is weak from 12K to 300K. Light emitting diodes (LEDs) with an active layer made of an intrinsic and doped SRSO are manufactured and studied: room temperature electroluminescence (EL) from the visible to 1.6 μm has been demonstrated.

Original languageEnglish (US)
Pages (from-to)523-528
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume452
StatePublished - Jan 1 1997
Externally publishedYes
EventProceedings of the 1996 MRS Fall Meeting - Boston, MA, USA
Duration: Dec 2 1996Dec 6 1996

All Science Journal Classification (ASJC) codes

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

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