JIANG Qing-yun, LI Chen-xia, YE Reng-guang, HUA You-jie, XU Shi-qing. Optical Properties of Ce<sup>3+</sup>, Tb<sup>3+</sup> Co-doped BaYF<sub>5</sub> Glass Ceramics[J]. Chinese Journal of Luminescence, 2011,32(10): 1030-1035
JIANG Qing-yun, LI Chen-xia, YE Reng-guang, HUA You-jie, XU Shi-qing. Optical Properties of Ce<sup>3+</sup>, Tb<sup>3+</sup> Co-doped BaYF<sub>5</sub> Glass Ceramics[J]. Chinese Journal of Luminescence, 2011,32(10): 1030-1035DOI:
Optical Properties of Ce3+, Tb3+ Co-doped BaYF5 Glass Ceramics
glass ceramic was prepared by high temperature melting. The X-ray diffraction spectra
excitation spectra and emission spectra were measured. The results indicate the BaYF
5
nanocrystalline phase exists in the glass matrix. Based on the Scherrer equation
the average size about 27 nm of BaYF
5
nanocrystalline was calculated. The intense blue emission band(425 nm)assigned to 5d
2
F
5/2
and 5d
2
F
7/2
transitions of Ce
3+
and blue emission(487 nm)
green emission (542 nm)
orange emission (582 nm) and red emission (620 nm) assigned to
5
D
4
7
F
J
(
J
=6
5
4
3) transitions of Tb
3+
ions
respectively
were observed at room temperature under 338 nm excitation in the glass ceramics. By adjusting the doped concentration of Ce
3+
and Tb
3+
the chromaticity coordinate of the glass ceramic is measured to be (0.287
0.336). The energy transfer between Ce
3+
and Tb
3+
was analysised systematically. The results indicate that Ce
3+
/ Tb
3+
co-doped BaYF
5
glass ceramics is a potential matrix material for white LED.
关键词
Keywords
references
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