[Up-conversion luminescence in nanocrystalline zirconia co-doped with Yb3+ and Tm3+ ions].
Guang Pu Xue Yu Guang Pu Fen Xi
; 24(1): 9-11, 2004 Jan.
Article
em Zh
| MEDLINE
| ID: mdl-15768963
ABSTRACT
Nanocrystalline zirconia co-doped with Yb3+ and Tm3+ ions was prepared by co-precipitation. Up-conversion luminescence of the samples doped with different Tm3+ concentrations was investigated under a 980 nm LD excitation. When x = 0.2 and 0.4, the luminescences of the two samples were mostly the same strong blue up-conversion peaked at 474 nm and very weak red up-conversion were observed, corresponding to the transitions of 1G4 --> 3H6 and 1G4 --> 3F4 respectively. However, there was no luminescence of x = 1. Blue up-conversion luminescence of 0.2 mol% Tm3+-ions-doped nanocrystalline zirconia under different annealing temperatures was investigated. Blue up-conversion emission grew stronger with annealing temperature increasing. With pumping current increasing, blue up-conversion emission grew stronger too. By studying the sources of blue up-conversion, we concluded that it was three-photon process.
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Bases de dados:
MEDLINE
Assunto principal:
Telúrio
/
Itérbio
/
Zircônio
/
Nanoestruturas
/
Íons
Idioma:
Zh
Revista:
Guang Pu Xue Yu Guang Pu Fen Xi
Ano de publicação:
2004
Tipo de documento:
Article
País de afiliação:
China