Preparation and characterization of Eu3+-doped CaCO3 phosphor by microwave synthesis
来源期刊：Rare Metals2009年第5期
论文作者：KANG Minga, b, LIU Juna, c, YIN Guangfub, and SUN Ronga a School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang , China b College of Materials Science and Engineering, Sichuan University, Chengdu , China c Shenzhen Ocean’s King Lighting Science and Technology Co., LTD., Shenzhen , China
文章页码：439 - 444
摘 要：A Eu3+-doped CaCO3 phosphor with red emission was prepared by microwave synthesis. The scanning electron microscopy （SEM） image and laser particle size analysis show that the CaCO3:Eu3+ particles are needle-like in the length range of 5.0-10.0 μm. The results of X-ray diffraction （XRD） analysis, Fourier transform infrared spectroscopy （FT-IR）, and Raman spectroscopy indicate that pure aragonite CaCO3:Eu3+ is prepared using microwave irradiation and the Eu3+ ion as a luminescence center inhabits the site of Ca2+. The photoluminescence excitation （PLE） spectrum shows that the strong broad band at around 270 nm and weak sharp lines in 300-550 nm are assigned to the charge transfer band of Eu3+-O2- and intra-configurational 4f-4f transitions of Eu3+, respectively. The photoluminescence （PL） spectrum implies that the red luminescence can be attributed to the transitions from the 5D0 excited level to the 7FJ （J = 0, 1, 2, 3, 4） levels of Eu3+ ions with the mainly electric dipole transition 5D0 → 7F2 （614 and 620 nm）, and the Eu3+ ions prefer to occupy the low symmetric site in the crystal lattice.
KANG Minga, b, LIU Juna, c, YIN Guangfub, and SUN Ronga a School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China b College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China c Shenzhen Ocean’s King Lighting Science and Technology Co., LTD., Shenzhen 518000, China
摘 要：A Eu3+-doped CaCO3 phosphor with red emission was prepared by microwave synthesis. The scanning electron microscopy （SEM） image and laser particle size analysis show that the CaCO3:Eu3+ particles are needle-like in the length range of 5.0-10.0 μm. The results of X-ray diffraction （XRD） analysis, Fourier transform infrared spectroscopy （FT-IR）, and Raman spectroscopy indicate that pure aragonite CaCO3:Eu3+ is prepared using microwave irradiation and the Eu3+ ion as a luminescence center inhabits the site of Ca2+. The photoluminescence excitation （PLE） spectrum shows that the strong broad band at around 270 nm and weak sharp lines in 300-550 nm are assigned to the charge transfer band of Eu3+-O2- and intra-configurational 4f-4f transitions of Eu3+, respectively. The photoluminescence （PL） spectrum implies that the red luminescence can be attributed to the transitions from the 5D0 excited level to the 7FJ （J = 0, 1, 2, 3, 4） levels of Eu3+ ions with the mainly electric dipole transition 5D0 → 7F2 （614 and 620 nm）, and the Eu3+ ions prefer to occupy the low symmetric site in the crystal lattice.
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