LIU Qing-zhe, LIU Yong-fu, ZHANG De-kai, ZHANG Jia-hua, HU Xiao-yun, YU Jin-ying. Luminescence and Thermal Properties of Ce<sup>3+</sup>, Mn<sup>2+</sup> Codoped Ba<sub>9</sub>(Y<sub>2-<em>x</em></sub>Sc<sub><em>x</em></sub>)(SiO<sub>4</sub>)<sub>6</sub> Phosphors[J]. Chinese Journal of Luminescence, 2013,34(11): 1440-1445
LIU Qing-zhe, LIU Yong-fu, ZHANG De-kai, ZHANG Jia-hua, HU Xiao-yun, YU Jin-ying. Luminescence and Thermal Properties of Ce<sup>3+</sup>, Mn<sup>2+</sup> Codoped Ba<sub>9</sub>(Y<sub>2-<em>x</em></sub>Sc<sub><em>x</em></sub>)(SiO<sub>4</sub>)<sub>6</sub> Phosphors[J]. Chinese Journal of Luminescence, 2013,34(11): 1440-1445 DOI: 10.3788/fgxb20133411.1440.
Luminescence and Thermal Properties of Ce3+, Mn2+ Codoped Ba9(Y2-xScx)(SiO4)6 Phosphors
2.0) samples are prepared by solid-state reaction. For this phosphor
with the gradually increased Sc
3+
contents from
x
=0 to
x
=2
the blue emission intensity of Ce
3+
for
x
=2 sample increases to 1.7 times and the red emission intensity of Mn
2+
increases to 1.9 times. By monitoring the photoluminescence and diffuse reflection spectra
it reveals that the increases of the Ce
3+
and Mn
2+
emissions are directly related with the enhancement of the absorbance of Ce
3+
and the energy transfer efficiency from Ce
3+
to Mn
2+
. The
x
=2 sample
Ba
9
Sc
2
(SiO
4
)
6
:Ce
3+
Mn
2+
was chosen for further thermal properties investigation. With temperature increasing
the red emission of Mn
2+
increases originally and then decreases. As the temperature reaches to 488 K
the intensity is as high as 84% of that at room temperature. The enhanced red luminescence and superior temperature stability indicate BSS:Ce
3+
Mn
2+
could be used for UV-based white LEDs as the red light source.
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references
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