Enhanced Long Persistence of Ca2MgSi2O7 : Eu2 + Yellow-Green Phosphors by Co-doping with Ce3 +

作者: Yu Gong , Yuhua Wang , Xuhui Xu , Yanqin Li , Ziqiang Jiang

DOI: 10.1149/1.3176668

关键词:

摘要: Long-afterglow phosphors Ca 1.998-x MgSi 2 O 7 :Eu 2+ 0.002, Ce 3+ x (0 ≤ 0.04) were prepared by a solid-state reaction under weak reductive atmosphere. Spectroscopy measurements demonstrated that energy transferred from to Eu . The energy-transfer efficiency was 61 %. Thermoluminescence measurement revealed co-doped samples created much appropriate traps leading the enhancement of afterglow. afterglow emission spectra in acted as sensitizers and [CaO 8 ] (535 nm) activators. duration prolonged nearly two times compared with single-doped sample. A possible mechanism presented discussed.

参考文章(24)
R Sakai, T Katsumata, S Komuro, T Morikawa, Effect of composition on the phosphorescence from BaAl2O4: Eu2+, Dy3+ crystals Journal of Luminescence. ,vol. 85, pp. 149- 154 ,(1999) , 10.1016/S0022-2313(99)00061-7
Yuanhua Lin, Zilong Tang, Zhongtai Zhang, Ce Wen Nan, Anomalous luminescence in Sr4Al14O25:Eu, Dy phosphors Applied Physics Letters. ,vol. 81, pp. 996- 998 ,(2002) , 10.1063/1.1490631
R. Chen, Yoram Kirsh, Analysis of thermally stimulated processes ,(1981)
D. Jia, R. S. Meltzer, W. M. Yen, W. Jia, X. Wang, Green phosphorescence of CaAl2O4:Tb3+,Ce3+ through persistence energy transfer Applied Physics Letters. ,vol. 80, pp. 1535- 1537 ,(2002) , 10.1063/1.1456955
Nobuhiro Kodama, Tomoko Takahashi, Mitsuo Yamaga, Yoshifumi Tanii, Jianrong Qiu, Kazuyuki Hirao, Long-lasting phosphorescence in Ce3+-doped Ca2Al2SiO7 and CaYAl3O7 crystals Applied Physics Letters. ,vol. 75, pp. 1715- 1717 ,(1999) , 10.1063/1.124799
Woan-Jen Yang, Teng-Ming Chen, Ce3+∕Eu2+ codoped Ba2ZnS3: A blue radiation-converting phosphor for white light-emitting diodes Applied Physics Letters. ,vol. 90, pp. 171908- ,(2007) , 10.1063/1.2731685
D. Jia, X. J. Wang, W. Jia, W. M. Yen, Persistent energy transfer in CaAl2O4:Tb3+, Ce3+ Journal of Applied Physics. ,vol. 93, pp. 148- 152 ,(2003) , 10.1063/1.1525860
V. Sivakumar, U. V. Varadaraju, Ce3 + → Eu2 + Energy Transfer Studies on BaMgSiO4 A Green Phosphor for Three Band White LEDs Journal of The Electrochemical Society. ,vol. 154, ,(2007) , 10.1149/1.2714303
Dongdong Jia, Enhancement of Long-Persistence by Ce Co-Doping in CaS : Eu2 + , Tm3 + Red Phosphor Journal of The Electrochemical Society. ,vol. 153, ,(2006) , 10.1149/1.2337087