The luminescence intensity of emission peak at around 525 nm decreased in the Ce3+ and Er3+ co-doped Ca3Sc2Si3O12 phosphors.Mg2+ ion,which was likely incorporated into the Sc3+ position of the host crystal,was co-doped to adjust the crystal field and compensate for the excess positive charge due to the doping of Ce3+.The green emission belonged to the 5d→4f transition of Ce3+ moved toward longer wavelength by addition of Mg2+ in Ce3+ and Er3+ co-doped Ca3Sc2Si3O12 phosphor,which could increase the brightness of the phosphor.However,the position of weakening of luminescence intensity at around 525 nm remained basically unchanged by increasing the amount of Mg2+.The results showed that the weakening of luminescence intensity at around 525 nm caused by the absorption of Er3+,which had littleinfluence on the environment of the crystal field.
参考文献
| [1] | Nakamuar S;Mukai T;Senoh M .Candela-class high-brightness InGaN/AIGaN double-heterostructure blue-light-emitting diodes[J].Applied Physics Letters,1994,64:1687. |
| [2] | Su Q;Wu H;Pan Y X;Xu J Guo C F Zhang X M Zhang J H Wang J Zhang M .Rare each luminescent materials for white LED solid state lighting[J].Journal of Rare Earths,2005,23:513. |
| [3] | Piao X Q;Horikawa T;Hanzawa H;Machida K .Photoluminescence properties of Ca2Si5N8:Eu2+ nitride phosphor prepared by carbothermal reduction and nitridation method[J].Chemistry Letters,2006,35:334. |
| [4] | Srivastava A M;Comanzo H A .White light emitting phosphor blend for LED devices[P].United States Patent:US 6501100,2002. |
| [5] | Zhang X;Liu X R .Luminescence properties and energy transfer of Eu2+ doped Ca8Mg(SiO4)4Cl2 phosphors[J].Journal of the Electrochemical Society,1992,139(02):622. |
| [6] | Shimomura Y;Kijima N .Phosphor,light emitting device using phosphor,and display and lighting system using light emitting device[P].United States Patent:US007189340 B2,2007. |
| [7] | Shimomura Y;Honma T;Shigeiwa M;Akai T Okamoto K Kijima N .Photoluminescence and crystal structure of greenemitting Ca3Sc2Si3O12:Ce3+ phosphor for white light emitting diodes[J].Journal of the Electrochemical Society,2007,154:35. |
| [8] | Suzuki Y;Kakihana M;Shimomura Y;Kijima N .Synthesis of Ca3Sc2Si3O12 : Ce3+ phosphor by hydrothermal Si alkoxide gelation[J].Journal of Materials Science,2008(7):2213-2216. |
| [9] | Shimomura Y;Kurushima T;Shigeiwa M;Kijima N .Redshift of green photoluminescence Ca3Sc2Si3O12:Ce3+ phosphor by charge compensatory additives[J].Journal of the Electrochemical Society,2008,155:45. |
| [10] | Liu, YH;Hao, JH;Zhuang, WD;Hu, YS .Structural and luminescent properties of gel-combustion synthesized green-emitting Ca3Sc2Si3O12 : Ce3+ phosphor for solid-state lighting[J].Journal of Physics. D, Applied Physics,2009(24):245102:1-245102:6. |
| [11] | Liu Y H;Zhuang W D;Hu Y S;Gao W G .Improved photoluminescence of green-emitting phosphor Ca3Sc2Si3O12:Ce3+for white light emitting diodes[J].Journal of Rare Earths,2010,28:181. |
| [12] | Walasek A;Eugeniusz Z;Zhang J;Wang SW .Synthesis, morphology and spectroscopy of cubicY(3)NbO(7): Er[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2007(2):523-530. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%