Spectral Characteristics of Ba2B2P2O10:Eu3+ Phosphor
Ba2B2P2O10:Eu3+ phosphor was synthesized by high temperature solid-state method. BaCO3(A.R.), NH4H2PO4(A.R), H3BO3(A.R.), Eu2O3(99.99%), NH4Cl(A.R.), Li2CO3(A.R.), Na2CO3(A.R.) and K2CO3(A.R.) were used for starting materials. After these individual materials were blended and grounded thoroughly in an agate mortar, the homogeneous mixture was heated at 1 000 for 3 h, and the phosphors were obtained. The phase present of the samples were characterized by powder X-ray diffraction (XRD) (D/max-rA, Cu Kα, 40 kV, 40 mA, λ=0.154 06 nm). The spectral characteristics of these phosphors were measured by a SHIMADZU RF-540 fluorescence spectrophotometer. Under the condition of 400 nm excitation, the emission spectrum of Ba2B2P2O10:Eu3+ phosphor shows several bands at 600, 618, 627 and 660 nm respectively, which correspond to the electric dipole 5 D 0→7 F 1, 7 F 2, 7 F 3 and 7 F 4 transitions of Eu3+. The effect of Eu3+ concentration or charge compensator on the emission intensity of Ba2B2P2O10:Eu3+ phosphor was investigated, and the result shows that the emission intensity of the phosphor increases with increasing Eu3+ concentration, viz. the concentration quenching has not existed. And the emission intensity of the phosphor was enhanced by doping charge compensator. All the results illuminate that Ba2B2P2O10:Eu3+ phosphor is a promising red phosphor for white LEDs.
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Document Type: Research Article
Publication date: 2010-08-01
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