Abstract
Ca3Sc2Si3O12:Ce3+phosphors with sub-micron size were successfully synthesized by a gel-combustion method. The crystal structure and morphology of the phosphors and their photoluminescence were investigated. The results indicate that the pure phase of Ca3Sc2Si3O12can be obtained at 1100 °C of firing temperature. The particles of phosphor are basically spherical in shape with the mean size less than 1 μm. The grain of the phosphor grows up gradually with the increasing of the firing temperature. The excitation spectrum shows a broad and strong absorption band centered around 450 nm, compatible with the excited wavelength of commercial blue light-emitting diode (LED) for white LED lighting. Bright green-emission located at 505 nm is observed and the intensity of the green-emission increases with the increase of firing temperature. Additionally, under low-voltage (2.5 kV) excitation of electron beam, bright green cathodoluminescence (CL) is also observed, which is attributed to the characteristic emission from Ce3+. Our work suggests that Ca3Sc2Si3O12:Ce3+phosphors are promising for both white LED and field-emission display applications.
| Original language | English |
|---|---|
| Pages (from-to) | 488-492 |
| Number of pages | 5 |
| Journal | Journal of Alloys and Compounds |
| Volume | 504 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 20 Aug 2010 |
Keywords
- FED
- Green-emitting phosphors
- Luminescence
- Rare earths
- White LED
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Chemistry
- Metals and Alloys