Synthesis and luminescence properties of a novel red-emitting phosphor SrCaSiO4:Eu3+ for ultraviolet white light-emitting diodes
来源期刊：Journal of Rare Earths2011年第5期
论文作者：于泓 高桂梅 孔丽 李广环 甘树才 洪广言
文章页码：431 - 435
摘 要：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.
于泓1，高桂梅1，孔丽1，李广环1，甘树才1，洪广言2
1. College of Chemistry,Jilin University2. State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences
摘 要：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.
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