首页|Simultaneous enhancement of red luminescence and thermal stability of a novel red phosphor:A Li+-Eu3+co-occupied site strategy in BaAl2Ge2O8 lattices
Simultaneous enhancement of red luminescence and thermal stability of a novel red phosphor:A Li+-Eu3+co-occupied site strategy in BaAl2Ge2O8 lattices
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
The rapid development of phosphor-converted white light emitting diodes(pc-WLEDs)requires new red phosphors with efficient and thermally stable luminescence for high-quality warm-white lighting.However,it is still a challenge to discover red phosphors with facile synthesis,high internal quantum efficiency(IQE),excellent thermal stability and high color purity.Herein,a novel red-emitting Eu3+activated barium dialuminum digermanate(BaAl2Ge2O8,BAGO)phosphor showing strong red emission at 610 nm was prepared.The IQE is improved from 32.91％to 78.84％by employing a charge compen-sation strategy.The lithium-ion co-doped BAGO:Eu3+phosphor exhibits a nearly twofold increase in integral photoluminescence(PL)intensity and the high color purity reaches 94.17％.Impressively,the PL intensity of the BAGO:Eu3+,Li+phosphor drops by only 2.6％at 150 ℃ of that at room temperature.Finally,the pc-WLED using the red BAGO:Eu3+,Li+phosphor exhibits white light with the chromaticity coordinate of(0.3515,0.3495),a high color-rendering index of 92 and a low correlated color temperature of 4746 K.All these results manifest that BAGO:Eu3+,Li+phosphor is a suitable red phosphor for near-ultraviolet(NUV)chip-based pc-WLEDs.
NETL
NSTL
万方数据
