[1] Y. Wang,J. Ohwaki. New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion [J]. Appl. Phys. Lett.,1993,63(24):3268-3280

[2] D. Adachi,H. Haze,H. Shirahase et al.. Blue emitting thin-film electroluminescent devices utilizing Tm-doped ZnS nanocrystals [J]. J. Non-Cryst. Solids,2006,352(9-20):1628-1631

[3] Zhang Long,Zhang Junjie,Qi Changhong et al.. Energy transfer and upconversion in Tm3+-Yb3+ co-doped AlF3-based fluoride Glass [J]. Chinese J. Lasers,2000,27(5):459-465

[4] Li Chenxia,Kang Juan,Zheng Fei et al.. Upconversion luminescence of Ho3+/Yb3+ codoped oxyfluoride silicate glass ceramics [J]. Chinese J. Lasers,2009,36(5):1184-1189

[5] Zhang Qinhui,Liu Bo,Xu Yuheng. Sensitization of Ce3+ ions co-doped in Zinc tungstate laser crystals doped with Nd3+ or Eu3+ ions [J]. Chinese J. Lasers,2008,35(4):605-609

[6] Yang Zhiyong,Luo Lan,Chen Wei. Spectral analyses of rare-earth ions in solid luminescent materials [J]. Acta Optica Sinica,2007,27(4):598-602

[7] Zhihong Lian,Jing Wang,Yuhua Lv et al.. The reduction of Eu3+ to Eu2+ in air and luminescence properties of Eu2+ activated ZnO-B2O3-P2O5 glasses [J]. J. Alloy. Compd.,2007,430:257-261

[8] Sun Xiaoyuan,Zhang Jiahua,Zhang Xia et al.. A green-yellow emitting β-ZnSiO4:Eu2+ phosphor for near ultraviolet chip white-light-emitting diode [J]. J. Rare Earth.,2008,26(3):421-424

[9] Chengyu Li,Qiang Su. Anew blue phosphorescent glass-ceramic:Rare-earth-doped calcium aluminoborate [J]. J. Alloy. Compd.,2006,408-412:875-878

[10] B. V. Padlyak,B. Kuklinski. Nature of instrinsic luminescence in the glasses of CaO-Ga2O3-GeO2 system [J]. Radiat. Meas.,2004,38:593-597