Promising red phosphors LaNbO4:Eu3+,Bi3+ for LED solid-state lighting application

稀土学报(英文版), 2010, 28(3): 356-360. doi: 10.1016/S1002-0721(09)60111-3

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

2.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

3.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

4.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

5.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

6.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

基金项目: the Large-Scale Instrument of Guangxi Cooperates and Shares the Network(496-2007-075) the Science Foundation of Guangxi Province(0731014) Innovation Project of Guangxi Graduate Education(105930903025)

Promising red phosphors LaNbO4:Eu3+,Bi3+ for LED solid-state lighting application

HUANG Junli ^1, , ZHOU Liya ^2, , LIANG Zhaoping ^3, , GONG Fuzhong ^4, , HAN Jianpeng ^5, , WANG Rongfang ^6,

1.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

2.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

3.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

4.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

5.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

6.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

Keywords： phosphors

La0.75NbO4:Eu3+0.25 and La0.65NbO4:Eu3+0.25,Bi3+0.10 phosphors were synthesized by solid-state reaction method,and their photoluminescence properties were discussed in detail.With the increased incorporation of the co-activator Bi3+,the charge transfer (CT) bands of Nb5+→O2- and Eu3+→O2- (-280 nm) weakened and a new and significant broad band Bi3+-O2- (-330 nm) appeared,while the peaks at 395 and 466 nm assigned to f-f transitions of Eu3+ was slightly changed.Compared with the commercial phosphor Y2O2S:0.05Eu3+,La0.75Nb5O4:Eu3+0.25 and La0.65Nb504:Eu3+0.25,Bi3+0.10 phosphors emit brighter red light at 615 nm with line spectra upon the excitation of near UV light (395 nm) and exhibited the Commission International d'Eclairage (CIE) chromaticity coordinates (x=0.658,y=0.342) and (x=0.657,y=0.342) that are closer to the standard of national television standard committee (NTSC).The results showed that La0.75Nb5O4:Eu3+0.25 and La0.65Nb5O4:Eu3+ 0.25,Bi3+0.10 phosphors might be as promising red phosphors for near UV InGaN-based LED solid-state lighting application.

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Promising red phosphors LaNbO4:Eu3+,Bi3+ for LED solid-state lighting application

参考文献