| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10653239 | Solid State Communications | 2005 | 4 Pages |
Abstract
The temperature dependence of emission spectra of alkaline earth ortho-silicates M2SiO4 (M=Ca, Sr, Ba) doped with Eu2+ ions is investigated. Two emission bands of Sr2SiO4:Eu2+ show the normal redshift with broadening bandwidth and decreasing emission intensity as an increase in temperature. On the other hand, emission bands of Ca2SiO4:Eu2+ and Ba2SiO4:Eu2+ show the anomalous blueshift with increasing temperature. For Ca2SiO4:Eu2+ and Ba2SiO4:Eu2+, the temperature dependence of the emission color can be described in terms of back tunneling from the excited state of low-energy emission band to the excited state of high-energy emission band in the configuration coordinate diagram. Our phosphors have a promising potential as phosphors for green or greenish white-light-emitting diode pumped by ultraviolet chip.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jong Su Kim, Yun Hyung Park, Sun Myung Kim, Jin Chul Choi, Hong Lee Park,