? ABRIL M, MENDEZ-RAMOS J, MARTIN I R, et al. Optical properties of Nd3+ ions in oxyfluoride glasses and glass ceramics comparing different preparation methods [J]. J Appl Phys, 2004, 95(10): 5271– 5279.
[2]
? DANTELLE G, MORTIER M, VIVIEN D, et al. Effect of CeF3 addition on the nucleation and up-conversion luminescence in transparent oxyfluoride glass-ceramics [J]. Chem Mater, 2005, 17(8): 2216–2222.
[3]
? LIU F, MA E, CHEN D, et al. Infrared luminescence of transparent glass ceramic containing Er3+:NaYF4 nanocrystals [J]. J Alloy Compd, 2009, 467(1/2): 317–321.
[4]
? TAKAHASHIY M, KANOZ M, KAWAMOTOA Y. Compositional dependence of local vibration around rare earth ions in SiO2–PbF2 glass-ceramics [J]. J Phys: Condens Matter, 1998, 10(14): 3269–3274.
[5]
? MENYUK N, DWIGHT K, PIERCE J W. NaYF4:Yb,Er—An efficient upconversion phosphor [J]. J Appl Phys, 1972, 21(4): 159–161.
[6]
? KANO T, SUZUKI T, SUZUKI A, et al. Dimensionless correlation of mass transfer in wire electroplating cells of various designs [J]. J Electrochem Soc, 1973, 120(1): 87–89.
[7]
? PAGE R H, SCHAFFERS K I, WAIDE P A, et al. Upconversion- pumped luminescence efficiency of rare-earth-doped hosts sensitized with trivalent ytterbium [J]. J Opt Soc Ame B, 1998, 15(3): 996–1008.
[8]
? ZENG J H, SU J, LI Z H, et al. Synthesis and upconversion luminescence of hexagonal-phase NaYF4:Yb, Er3+ phosphors of controlled size and morphology [J]. Adv Mater, 2005, 17(17): 2119–2123.
[9]
? MARTIN N, BOUTINAUD P, MALINOWSKI M, et al. Optical spectra and analysis of Pr3+ in β-NaYF4 [J]. J Alloy Compd, 1998, 275–277: 304–306.
[10]
? KR?MER K W, BINER D, FREI G, et al. Hexagonal sodium yttrium fluoride based green and blue emitting upconversion phosphors [J]. Chem Mater, 2004, 16(7): 1244–1251.
[11]
? SUYVER J F, GRIMM J, VAN VEEN M K, et al. Upconversion spectroscopy and properties of NaYF4 doped with Er3+, Tm3+ and/or Yb3+ [J]. J Lumin, 2006, 117(1): 1–12.
[12]
? LIU F, MA E, CHEN D Q, YU Y, WANG Y S. Tunable red-green upconversion luminescence in novel transparent glass ceramics containing Er:NaYF4 nanocrystals [J]. J Phys Chem B, 2006, 110(42): 20843–20846.
[13]
? JUDD B R. Optical absorption intensities of rare-earth ions [J]. Phys Rev, 1962, 127(3): 750–761.
[14]
? OFELT G S. Intensities of crystal spectra of rare-earth ions [J]. J Chem Phys, 1962, 37(3): 511–520.
[15]
? LIN H, PUN E Y B, LIU X R. Er3+-doped Na2O·Cd3Al2Si3O12 glass for infrared and upconversion applications [J]. J Non-cryst Solids, 2001, 283(1–3): 27–33.
[16]
? CARNALL W T, FIELDS P R, RAJNAK K. Electronic energy levels in the trivalent lanthanide aquo ions. I. Pr3+, Nd3+, Pm3+, Sm3+, Dy3+, Ho3+, Er3+, and Tm3+ [J]. J Cheml Phys, 1968, 49(10): 4424–4442.
MENG Jie, ZHAO Lijuan, YU Hua, et al. Acta Phys Sin (in Chinese), 2005, 54(3): 1442–1446.
[21]
? TANABE S. Optical transitions of rare earth ions for amplifiers: how the local structure works in glass [J]. J Non-cryst Solids, 1999, 259(1–3): 1–9.
[22]
? VELAZQUEZ J J, RODRIGUEZ V D, YANES A C, et al. Increase in the Tb3+ green emission in SiO2–LaF3 nano-glass-ceramics by codoping with Dy3+ ions [J]. J Appl Phys, 2010, 108(11): 113530.1–113530.5.