Photoluminescence properties of a novel red-emitting phosphor Ba2LaV3O11:Eu3+
Ba 2 LaV 3 O 11 :Eu 3+ phosphors were firstly synthesized by the traditional solid-state reaction method at 1100 °C. Their luminescence properties were investigated by photoluminescence excitation and emission spectra. The excitation spectrum shows a broad band centered at about 275 nm in the region from 200 to 370 nm, which is attributed to an overlap of the charge transfer transitions of O 2− → V 5+ and O 2− → Eu 3+ . The phosphors exhibit the red emissions of Eu 3+ and the emission intensity ratio of 5 D 0 → 7 F 2 to 5 D 0 → 7 F 1 is dependent on the Eu 3+ concentration due to an environment change about Eu 3+ ions. Concentration quenching occurs at 30 mol% in the phosphors and exchange interaction is its main mechanism. Ba 2 LaV 3 O 11 :Eu 3+ displays tunable CIE color coordinates from yellow orange to red depended on Eu 3+ content, which may have a potential application for illuminating and display devices.
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