Issue 2, 1996

Influence of crystal structure on the luminescence properties of bismuth(III), europium(III) and dysprosium(III) in Y2SiO5

Abstract

The luminescence properties of Bi3+, Eu3+, Dy3+ and energy transfer from Bi3+ to Dy3+ and Eu3+ have been studied in two modifications of Y2SiO5(low-temperature X1 type and high-temperature X2 type) and discussed in relation to their crystal structures. The Bi3+ ion luminesces in the blue region of the spectrum in X1-Y2SiO5 but in the UV region in X2-Y2SiO5. Two obviously different luminescent centres have been observed for Bi3+ and Eu3+ in X1-Y2SiO5, but only one has been seen in X2-Y2SiO5. The Stokes shift (9200 cm–1) for Bi3+ in X1-Y2SiO5 is much larger than that (5000 cm–1) in X2-Y2SiO5. This suggests that the host lattice is more rigid in X2-Y2SiO5 than in X1-Y2SiO5. As a result, the Bi3+, Eu3+ ions show higher emission intensity in the former than in the latter type. X1-Y2SiO5 is more suitable for Bi3+→ Eu3+ energy transfer and X2-Y2SiO5 is more suitable for Bi3+→ Dy3+ energy transfer.

Article information

Article type
Paper

J. Mater. Chem., 1996,6, 265-269

Influence of crystal structure on the luminescence properties of bismuth(III), europium(III) and dysprosium(III) in Y2SiO5

J. Lin, Q. Su, S. Wang and H. Zhang, J. Mater. Chem., 1996, 6, 265 DOI: 10.1039/JM9960600265

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