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Citation: Liu Yingliang, Shi Chunshan, Li Youmo. LUMINESCENT PROPERTIES OF BaYF₅ ACTIVATED BY Eu(Ⅱ) AND Ce(Ⅲ)[J]. Chinese Journal of Applied Chemistry, ;1989, 6(5): 26-30. shu

LUMINESCENT PROPERTIES OF BaYF₅ ACTIVATED BY Eu(Ⅱ) AND Ce(Ⅲ)

1.
Labpratory of Rare Earth Chemistry and Physics, Changchum Institute of Applied Chemistry, Academia Sinica

Received Date: 27 December 1988
Available Online: 25 March 1988

In present paper luminescent characteristics of Eu (Ⅱ) and Ce(Ⅲ) and their concentration quenching in BaYF₅ are studied. Both ions show d-f excitation and emission. By comparison with the values reported before,the quenching concentrations of Eu(Ⅱ) and Ce(Ⅲ) are lower because of the energy migration in Eu(Ⅱ)-Eu(Ⅱ) and Ce(Ⅲ)-Ce(Ⅲ). The quenching mechanism is acquired by the relation between their emission intensities and their concentrations, which is dipole-dipole interaction. The energy transfer from Ce (Ⅲ) to Eu(Ⅱ) was found in the system BaYF₅. A mechanism of radiationless energy transfer is proposed based on the electric multipole-multipole interaction in the system.There also exist a radiative transfer. A possible way for energy transfer is given.
- Barium and Yttrium fluoride,
- Euripium (Ⅱ),
- Cerium (Ⅲ),
- Activation
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LUMINESCENT PROPERTIES OF BaYF5 ACTIVATED BY Eu(Ⅱ) AND Ce(Ⅲ)

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LUMINESCENT PROPERTIES OF BaYF₅ ACTIVATED BY Eu(Ⅱ) AND Ce(Ⅲ)