A potential red phosphor ZnMoO 4:Eu 3+ for light-emitting diode application

Abstract

Motivated by the need for new red phosphors for solid-state lighting applications Eu 3+-doped ZnMoO 4 was prepared by solid-state reaction and its photoluminescence properties were investigated. Compared with Ca 0.80MoO 4:Eu 0.20 3+, the obtained Zn 0.80MoO 4:Eu 0.20 3+ phosphor shows a stronger excitation band near 400 nm as well as enhanced red emissions (under 393 nm excitation). The strong red-emission lines at 616 nm correspond to the forced electric dipole 5 D 0→ 7 F 2 transitions on Eu 3+. The chromaticity coordinates ( x=0.63, y=0.37) are close to the standard of National Television Standard Committee (NTSC). The optical properties suggest that Zn 0.80MoO 4:Eu 0.20 3+ is an efficient red-emitting phosphor for LED applications.