Laser-grown silicon nanoparticles and photoluminescence properties

N. Herlin-Boime, K. Jursikova, E. Trave, E. Borsella, O. Guillois, F. Fabbri, J. Vicens, C. Reynaud

Research output: Contribution to conferencePaper

8 Citations (Scopus)

Abstract

Light-emitting silicon nanocrystals (Si nc) have attracted much interest due to their possible application as optoelectronic devices. The interest for Si nanopowders is enhanced by their photoluminescence (PL) emission intensity that can be very strong at room temperature. Due to the intrinsic biocompatibility of Si nanoparticles, this strong optical emission intensity as well as the long decay time (mean life time around hundred microseconds) make these powders potential candidates as tracers for in-vivo applications. Si nanopowders were obtained in gram quantities by CO2laser pyrolysis of silane. The particles in the produced powders are in the size range 10-15 nm. These nanoparticles exhibit strong red photoluminescence after heat treatment. The appearance of intense PL emission is clearly related to the surface oxidation of the powders which must be carefully controlled. Several steps have been identified in the oxidation process. This paper presents a detailed study of the evolution of both the photoluminescence intensity and spectral dependence and of the crystalline structure as a function of the heat treatment. We also show that the nanopowders can be dispersed in liquids and incorporated in gel samples while keeping their intense photoluminescence. This result opens a route towards the fabrication of novel devices.
Original languageEnglish
Publication statusPublished - 2004
Externally publishedYes
EventNanoparticles and Nanowire Building Blocks - Synthesis, Processing, Characterization and Theory - , United States
Duration: 1 Jan 2004 → …

Conference

ConferenceNanoparticles and Nanowire Building Blocks - Synthesis, Processing, Characterization and Theory
CountryUnited States
Period1/1/04 → …

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All Science Journal Classification (ASJC) codes

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

Cite this

Herlin-Boime, N., Jursikova, K., Trave, E., Borsella, E., Guillois, O., Fabbri, F., ... Reynaud, C. (2004). Laser-grown silicon nanoparticles and photoluminescence properties. Paper presented at Nanoparticles and Nanowire Building Blocks - Synthesis, Processing, Characterization and Theory, United States.