Blue- and red-emitting phosphor nanoparticles embedded in a porous matrix

Taghavinia, N ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1016/j.tsf.2005.11.052
  3. Publisher: 2006
  4. Abstract:
  5. Eu3+- and Ce3+-doped yttrium silicate, as well as Eu2+-doped zinc silicate nanoparticles, were grown in a porous SiO2 matrix using an impregnation method. For Y2Si 2O7:Eu3+, particles of about 50 nm size were obtained that exhibited several photoluminescence (PL) peaks in red. Different peaks showed slightly different decay times; however, their excitation mechanism was found the same. Increasing the Eu concentration increased the PL intensity while reducing the decay time. Y2Si2O7:Ce 3+ nanoparticles in the porous matrix showed bright blue emission, consisting of two peaks at 358 nm and 378 nm. Re-impregnation process was found effective in changing the relative intensity of the two peaks. Zn 2SiO4:Eu2+ nanoparticles in porous glass consisted of amorphous particles of about 20 nm size inside the porous matrix. The luminescence was a broad peak centered at 418 nm. These phosphor systems, together with our previously reported Zn2SiO4:Mn 2+ in porous SiO2 structure, comprise a red-green-blue system that can be used in display applications. © 2005 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Amorphous materials ; Cerium ; Phosphors ; Photoluminescence ; Porous materials ; Yttrium ; Zinc ; Impregnation method ; Porous matrix ; Porous substrate ; Nanostructured materials
  8. Source: Thin Solid Films ; Volume 503, Issue 1-2 , 2006 , Pages 190-195 ; 00406090 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0040609005022686