GU Lu-shun, SHI Nan, ZHANG Le etc. Synthesis and Luminescent Properties of Tb/Eu Co-doped Zinc Borophosphate Glasses for White Light Generation[J]. Chinese Journal of Luminescence, 2014,35(8): 897-904
GU Lu-shun, SHI Nan, ZHANG Le etc. Synthesis and Luminescent Properties of Tb/Eu Co-doped Zinc Borophosphate Glasses for White Light Generation[J]. Chinese Journal of Luminescence, 2014,35(8): 897-904 DOI: 10.3788/fgxb20143508.0897.
Synthesis and Luminescent Properties of Tb/Eu Co-doped Zinc Borophosphate Glasses for White Light Generation
Tb/Eu co-doped zinc borophosphate glasses were successfully synthesized by melt quenching method. The effect of glass matrix composition and rare erath ions concentration were discussed. The structural and luminescent properties were characterized by Fourier transform infrared (FT-IR) spectra
absorption spectra
photoluminescence(PL) spectra
fluorescence lifetimes and colorimetric analysis. Eu
3+
ions were partly reduced to Eu
2+
during the synthesization in air. Under 380 nm excitation
white light emission was observed composited by emission at 612 nm and 590 nm for Eu
3+
544 nm and 488 nm for Tb
3+
and 430 nm for Eu
2+
. The FT-IR spectra showed that the structure of glass matrix changed when B
2
O
3
content increased
which affected the Eu
2+
/Eu
3+
ratio in glass samples. The spectra results show that Eu
2+
ions are donors which can transfer energy to Eu
3+
and Tb
3+
. Lifetime analysis proved that Tb
3+
ions can transfer energy to Eu
3+
through nonradiative transition. The luminescence intensity and emission color can be efficiently controlled by changing glass composition and rare earth ion concentration. Optimized white light with CIE(0.3187
0.2861) and correlated color temperature at 6 480 K was obtained when the mole fractions of Eu and Tb were both 1.5%.
关键词
Keywords
references
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