在真空紫外光和低电压阴极射线激发下，ZnAl2O4:Mn2+ 发出强烈的绿光。

Intensive green emission of ZnAl2O4:Mn2+ under vacuum ultraviolet and low-voltage cathode ray excitation.

机构信息

MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.

出版信息

Opt Lett. 2012 Jul 1;37(13):2511-3. doi: 10.1364/OL.37.002511.

DOI:10.1364/OL.37.002511

PMID:22743438

Abstract

A series of Zn(1-x)Mn(x)Al(2)O(4) (x=0.001∼0.08) phosphors were synthesized by a traditional solid-state reaction route. Their photoluminescence under vacuum ultraviolet (VUV, energy E>50000 cm(-1), wavelength λ<200 nm) and cathodoluminescence under low-voltage electron beam excitation were evaluated. The luminescence decays were also measured. The intense green emission was observed with a peak at about 510 nm upon 172/147 nm excitation. The luminescence of optimum phosphor Zn(0.99)Mn(0.01)Al(2)O(4) (ZAM) was compared with that of commercial green phosphor Zn(2)SiO(4):Mn(2+) (ZSM). The maximum emission intensity of ZAM is larger than that of ZSM under 172/147 nm and low-voltage electron beam excitation. The values of chromaticity coordinates reveal the phosphors can evidently enlarge the tricolor gamut. The results show that the ZnAl(2)O(4):Mn(2+) phosphors may be considered as candidates for Hg-free lamps, plasma flat backlights, and field emission backlights for liquid crystal displays.

摘要

通过传统的固态反应路线合成了一系列 Zn(1-x)Mn(x)Al(2)O(4)（x=0.001∼0.08）荧光粉。评估了它们在真空紫外光（VUV，能量 E>50000 cm(-1)，波长 λ<200nm）下的光致发光和在低电压电子束激发下的阴极发光。还测量了发光衰减。在 172/147nm 激发下，观察到约 510nm 处出现强绿光发射峰。最佳荧光粉 Zn(0.99)Mn(0.01)Al(2)O(4)（ZAM）的发光与商用绿色荧光粉 Zn(2)SiO(4):Mn(2+)（ZSM）的发光进行了比较。在 172/147nm 和低电压电子束激发下，ZAM 的最大发射强度大于 ZSM。色度坐标的值表明，这些荧光粉可以明显扩大三基色色域。结果表明，ZnAl(2)O(4):Mn(2+)荧光粉可作为无汞灯、等离子体平板背光源和液晶显示器场发射背光源的候选材料。