A series of ${\mathrm{Zn}}_{1-x}{\mathrm{Mn}}_x{\mathrm{Al}}_2{\mathrm{O}}_4$ ($x=0.001\sim 0.08$) phosphors were synthesized by a traditional solid-state reaction route. Their photoluminescence under vacuum ultraviolet (VUV, energy $E>50000{\mathrm{cm}}^{-1}$, wavelength $\lambda <200\mathrm{nm}$) 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 $172/147\mathrm{nm}$ excitation. The luminescence of optimum phosphor ${\mathrm{Zn}}_{0.99}{\mathrm{Mn}}_{0.01}{\mathrm{Al}}_2{\mathrm{O}}_4$ (ZAM) was compared with that of commercial green phosphor ${\mathrm{Zn}}_2{\mathrm{SiO}}_4\text{:}{\mathrm{Mn}}^{2+}$ (ZSM). The maximum emission intensity of ZAM is larger than that of ZSM under $172/147\mathrm{nm}$ 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 ${\mathrm{ZnAl}}_2{\mathrm{O}}_4\text{:}{\mathrm{Mn}}^{2+}$ phosphors may be considered as candidates for Hg-free lamps, plasma flat backlights, and field emission backlights for liquid crystal displays.

© 2012 Optical Society of America

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