稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2013年
10期
957-961
,共5页
孙志华%汪敏强%宋孝辉%蒋自强
孫誌華%汪敏彊%宋孝輝%蔣自彊
손지화%왕민강%송효휘%장자강
Ca4Y6(SiO4)6O:Eu3+%combustion synthesis%luminescent characteristics%white LED%rare earths
Eu3+activated Ca4Y6(SiO4)6O phosphors were prepared by combustion synthesis method, and their morphologies and lu-minescent properties were investigated. Field scanning electron microscopy (FSEM) confirmed that the crystallite sizes of nanoparti-cles with narrow diameter ranging from 30 to 60 nm. The excitation spectra of Ca4Y6(SiO4)6O:Eu3+showed that there existed two strong excitation bands at around 399 nm (7F0→5L6) and 469 nm (7F0→5D2), which were consistent with the output wavelengths of near-UV and blue LEDs, respectively. The emission spectra of Ca4Y6(SiO4)6O:Eu3+were dominant by a red peak located at 614 nm due to the 5D0→7F2 transition of Eu3+. With the increase of Eu3+concentration, the luminescence intensity of the red phosphor reached maximum and then decreased. The optimum concentration for Eu3+in Ca4Y6(SiO4)6O was 21 mol.%.
