White luminescence from silica glass containing red/green/blue luminescent nanocrystalline silicon particles
2007; American Institute of Physics; Volume: 102; Issue: 10 Linguagem: Inglês
10.1063/1.2811920
ISSN1520-8850
AutoresKeisuke Sato, Naoki Kishimoto, Kenji Hirakuri,
Tópico(s)Glass properties and applications
ResumoSilica glasses containing blue/green/red luminescent nanocrystalline silicon (nc-Si) particles that consist of monolayer and/or three-layer structures were fabricated by a radio-frequency sputtering technique and postannealing treatment. These silica glasses showed very broad luminescence spectra with a peak at 460 nm (blue light), 550 nm (green light), and 800 nm (red light). When these samples were irradiated by using a xenon lamp with an optical bandpass filter of 313 nm, the luminescence colors from these silica glasses were a white light. The white luminescence of the sample with the three-layer structure exhibited the high luminance value of 1.5 cd/m2. This value was ascribed to the adjustment of sizes and densities of blue/green/red luminescent nc-Si particles, and the lowering of densities of Pb centers (nonradiative recombination centers) at the nc-Si particle/silica glass interface layer.
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