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Blue Light Emission from Silicon Ultrafine Particles

  • Shinji Nozaki (a1), S. Sato (a1), H. Ono (a1) and H. Morisaki (a1)

Abstract

The oxygen-containing silicon (Si) ultrafine particles have been deposited onto Si and SiO2 substrates by evaporation of Si powder in an oxygen-containing argon atmosphere. The asdeposited Si ultrafine particles exposed to the ultraviolet light emit blue light, which is strong enough to be seen with the naked eye. The blue light emission is associated with a broad photoluminescence (PL) peak at 2.7 eV, which is attributed to radiative recombination via a radiative recombination center. The proposed model with one radiative and two nonradiative recombination centers well explains the temperature-dependent PL peak intensity.

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Blue Light Emission from Silicon Ultrafine Particles

  • Shinji Nozaki (a1), S. Sato (a1), H. Ono (a1) and H. Morisaki (a1)

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