Influence of Al3+ ions on the enhancement of the fluorescence in the CaMoO4:Sm3+ phosphor

A series of novel orange red emitting Ca1-xMoO4:xSm(3+) (0 < x <= 0.03) and Ca0.99Mo1-yAlyO4:0.01Sm(3+) (0 <= y <= 0.1) phosphors were prepared by the high temperature solid state method. The phases and luminescent properties of the obtained Ca1-xMoO4:xSm(3+) (0 < x <= 0.03) and Ca0.99Mo1-yAlyO4.0.01Sm(3+) phosphors were characterized. Results demonstrate that the phosphors particles emit an intensive reddish orange light emission under excitation at 403 nm. Emission bands of (4)G(5/2) -> H-6(5/2) (564 nm), (4)G(5/2) -> H-6(7/2) (599 nm), and (4)G(5/2) -> H-6(9/2) (646 nm) for the Sm3+, with an excitation at H-6(5/2) -> F-4(7/2) (402 nm) have been recorded. Of them, (4)G(5/2) -> H-6(7/2) (598 nm) has shown a bright orange emission. Additionally, the effect of Al3+ incorporation concentration on the luminescent properties of Ca0.99MoO4:0.01Sm(3+) was investigated. Results suggest that Ca0.99Mo1-yAlyO4:0.01Sm(3+) is a promising orange red-emitting phosphor for UV LED applications. (C) 2013 Elsevier Ltd. All rights reserved.