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

Abstract

Abstract A series of novel orange red emitting Ca 1− x MoO 4 : x Sm 3+ (0 x ≤0.03) and Ca 0.99 Mo 1− y Al y O 4 :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 Ca 1− x MoO 4 : x Sm 3+ (0 x ≤0.03) and Ca 0.99 Mo 1− y Al y O 4 :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 → 6 H 5/2 (564 nm), 4 G 5/2 → 6 H 7/2 (599 nm), and 4 G 5/2 → 6 H 9/2 (646 nm) for the Sm 3+ , with an excitation at 6 H 5/2 → 4 F 7/2 (402 nm) have been recorded. Of them, 4 G 5/2 → 6 H 7/2 (598 nm) has shown a bright orange emission. Additionally, the effect of Al 3+ incorporation concentration on the luminescent properties of Ca 0.99 MoO 4 :0.01Sm 3+ was investigated. Results suggest that Ca 0.99 Mo 1− y Al y O 4 :0.01Sm 3+ is a promising orange red-emitting phosphor for UV LED applications.