کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1495099 | 992926 | 2012 | 5 صفحه PDF | دانلود رایگان |
Rare earth (Eu/Sm) doped silica–titania composite systems were sensitized by sol–gel method in solid and powder forms. The crystalline phase has been identified for the annealed samples at 1000 °C by X-ray diffraction (XRD). The bonding formation of the host matrix was examined by Fourier transform infrared (FTIR). The fingerprint transition lines of Eu3+ ions, with the main emission line at 616 nm, are recorded for the samples. Improvement in Eu3+ luminescence has been recorded by adding Sm3+ and by samples. Violet emission is observed under UV irradiation. Violet–blue upconversion luminescence is recorded at room temperature.
► Preparation, characterization and luminescence properties of Eu/Sm codoped sol gel SiO2TiO2 are reported.
► Preliminary results have indicated that SiO2TiO2 is a suitable host candidate for Eu and Sm ions.
► Improvement in Eu3+ luminescence is reported by adding Sm and by sample annealing.
► Violet and red light emission has been recorded for the solid samples.
► Well resolved violet–blue upconversion luminescence is recorded.
Journal: Optical Materials - Volume 35, Issue 2, December 2012, Pages 292–296