Size controllable synthesis and multicolor fluorescence of SiO2:Ln3+(Ln=Eu,Tb) spherical nanoparticles |
| |
| Affiliation: | 1. College of Chemistry, Jilin University, Changchun130012, People''s Republic of China;2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun130012, People''s Republic of China;1. Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China;2. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China;3. Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, 510006, PR China;1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China;2. Oxide Technology Laboratory, BOE Technology Group Co. Ltd., Beijing 100176, China;1. School of Civil Engineering, Henan Institute of Engineering, Zhengzhou 451191, PR China;2. College of Science, Henan Institute of Engineering, Zhengzhou 451191, PR China;3. School of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou 451191, PR China;1. Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland;2. Institute of Electronic Materials Technology, Wólczy?ska 133, 01-919 Warszawa, Poland |
| |
| Abstract: | A series of size controllable Tb3+ and/or Eu3+ activated nano-sized silica phosphors have been successfully synthesized through a facile sol-gel method. The structure, morphology, compositions, and luminescence properties of as-prepared samples were well investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) and photoluminescence spectroscopy (PL). The results showed that all as-prepared samples were spherical nanoparticles but the sizes reduced gradually with the temperature increased from 25 °C to 65 °C, which was contrary to the BET surfaces as well as the luminescence intensity. Under ultraviolet excitation, the SiO2:Ln3+(Ln=Eu, Tb) spherical nanoparticles showed characteristic red and green emissions corresponding to f-f transition of Eu3+ and Tb3+, respectively. Moreover, the luminescence emissions of samples can be tuned from green to yellow, orange and red by co-doping the Tb3+ and Eu3+ ions in different concentration ratio into the SiO2 host due to the efficient dipole–dipole energy transfer mechanism from Tb3+ to Eu3+ under 377 nm excitation. These results show that as-prepared phosphors may find potential applications in color display fields. |
| |
| Keywords: | Silica Photoluminescence Energy transfer Multicolor phosphors |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
