Luminescence of Pb2+ and energy transfer from Pb2+ to rare earth ions in silicate oxyapatites


Autoria(s): Lin J; Su Q
Data(s)

1996

Resumo

The Pb2+ luminescence in a series of silicate oxyapatites Me(2)(Y, Gd)(8)(SiO4)(6)O-2, Me(4)Y(6)(SiO4)(6)O (Me = Mg: Ca, Sr) is reported and discussed in relation to the crystal structure. The maximum wavelengths of the excitation (S-1(0)-P-3(1)) and emission (P-3(1)-S-1(0)) bands of Pb2+ are independent of the Mc:Y ratio (2:8 or 4:6) but they have lower energies in MgY-oxyapatites than in CaY- and SrY-oxyapatites. The Stokes shift of Pb2+ luminescence amounts to 11 100 to 11 400 cm(-1): which does not depend strongly on the host composition. There exists a mutual energy transfer between Pb2+ and Gd3+ in Sr2Gd8(SiO4)(6)O-2. At last, the dependence of the energy transfer efficiency of Pb2+-Sm3+, Tb3+: Dy3+ in Sr-2(La: Gd)(8)(SiO4)(6)O-2 and Ca-2(Y, Gd)(8)(SiO4)(6)O-2 on their doping concentrations was studied in more detail.

Identificador

http://202.98.16.49/handle/322003/25349

http://www.irgrid.ac.cn/handle/1471x/157402

Idioma(s)

英语

Fonte

Lin J;Su Q.Luminescence of Pb2+ and energy transfer from Pb2+ to rare earth ions in silicate oxyapatites,PHYSICA STATUS SOLIDI B-BASIC RESEARCH,1996,196(1):261-267

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期刊论文