首页|Effect of Eu3+,Bi3+,and Li+doping on luminescent property of GdNbO4
Effect of Eu3+,Bi3+,and Li+doping on luminescent property of GdNbO4
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We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4 were prepared using a high-temperature solid-state reaction method.The red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission significantly.This improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio esti-mated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4 does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4 phosphors.
Eu3+GdNbO4Codoping of Li+PhotoluminescenceSensitizerRare earths
S.W.Wi、Y.S.Lee
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Department of Physics and Integrative Institute of Basic Sciences,Soongsil University,Seoul,06978,Republic of Korea
National Research Foundation of Korea(NRF)funded by the Ministry of Education
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