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

作者：Huang Junli; Zhou Liya^*; Liang Zhaoping; Gong Fuzhong; Han Jianpeng; Wang Rongfang

来源：Journal of Rare Earths, 2010, 28(3): 356-360.

DOI：10.1016/S1002-0721(09)60111-3

• phosphors
• photoluminescence
• LED solid-state lighting
• rare earths

La0.75NbO4:Eu-0.25(3+) and La0.65NbO4:Eu-0.25(3+), Bi-0.10(3+) 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+-->O-2- (-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:0.05Eu(3+), La0.75Nb5O4:Eu-0.25(3+) and La0.65Nb5O4:Eu-0.15(3+), Bi-0.10(3+) 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:Eu-0.25(3+) and La0.65Nb5O4:Eu-0.25(3+), Bi-0.10(3+) phosphors might be as promising red phosphors for near UV InGaN-based LED solid-state lighting application.

• 出版日期2010-6
• 单位广西大学