Synthesis and luminescence of SiO2/Zn2SiO4 and SiO2/Zn2SiO4:Mn composite with sol-gel methods
El Ghoul, J; Omri, K; Alyamani, A; Barthou, C; El Mir, L
| HERO ID | 1868021 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | Synthesis and luminescence of SiO2/Zn2SiO4 and SiO2/Zn2SiO4:Mn composite with sol-gel methods |
| Authors | El Ghoul, J; Omri, K; Alyamani, A; Barthou, C; El Mir, L |
| Journal | Journal of Luminescence |
| Volume | 138 |
| Page Numbers | 218-222 |
| Abstract | The sol gel method is used for the preparation of undoped and manganese-doped Zn2SiO4 particles embedded in SiO2 host matrix with supercritical drying of ethyl alcohol in two steps. Zn2SiO4 and Zn2SiO4: Mn were prepared by simple solid-phase reaction in a natural atmosphere at 1200 degrees C after the incorporation of the nanoparticles of ZnO and ZnO: Mn, respectively, in the silica monolith. The photoluminescence (PL) measurements show a band centered at about 760 nm in the case of non-doped Zn2SiO4 which is attributed to energy transfer from Zn2SiO4 particles to NBOHs interface defects. In the case of Manganese doped Zn2SiO4, the PL reveals a band centered at about 525 nm attributed to Mn2+ in Zn2SiO4. Photoluminescence excitation (PLE) measurements show different origins of the emission. It was suggested that electronic transition T-4(1)((4)G)->(6)A(1)(S-6) associated with Mn2+ ions in willemite and the presence of Mn2+ in intensive crystal field were responsible for these luminescence band centered at 525 nm. (C) 2013 Elsevier B.V. All rights reserved. |
| Doi | 10.1016/j.jlumin.2013.02.009 |
| Wosid | WOS:000318055500039 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Zn2SiO4; Zinc oxide; Nanoparticles; Sol-gel; Optical materials |