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A novel red phosphor based on Eu3+-activated SrCaSiO4 was successfully synthesized by conventional solid state reaction method and the photoluminescence properties were investigated. X-ray diffraction (XRD) patterns indicated that SrCaSiO4:Eu3+ phosphors belong to orthorhombic crystal system (space group=Pmnb). The photoluminescence (PL) excitation spectrum showed broad-band absorption and the strongest excitation peak at 397 nm contributed to the 7F0→5L6 transition which matched well with the emission of a UV chip. The PL emission spectrum with the peaks at 577,586,592,612,650 and 685 nm,were probably attributed to the transitions from 5D0 to 7FJ (J=0,1,2,3,4) of Eu3+ ions. The quenching concentration of Eu3+ was 10 mol.%,and the critical distance (Rc) was about 1.2 nm. The fluorescence lifetime of Eu3+ ions was found to be 3.2 ms. The results indicated that the SrCaSiO4:Eu3+ might become an important red phosphor candidate for white-light-emitting diodes with near-UV LED chips.
A novel red phosphor based on Eu3 + -activated SrCaSiO4 was synthesized from conventional solid state reaction method and the photoluminescence properties were investigated. X-ray diffraction (XRD) patterns indicated that SrCaSiO4: Eu3 + phosphors belong to orthorhombic crystal system (space group = Pmnb ) The photoluminescence (PL) excitation spectrum showed broad-band absorption and the strongest excitation peak at 397 nm contributed to the 7F0 → 5L6 transition which matched well with the emission of a UV chip. The PL emission spectrum with the peaks at 577, 586, 592, 612, 650 and 685 nm, were roughly attributed to the transitions from 5D0 to 7FJ (J = 0,1,2,3,4) of Eu3 + ions. The quenching concentration of Eu3 + was 10 mol.%, And the critical distance (Rc) was about The fluorescence lifetime of Eu3 + ions was found to be 3.2 ms. The results indicated that the SrCaSiO4: Eu3 + might become an important red phosphor candidate for white-light-emitting diodes with near-UV LED chips.