冯景春, 李益祖, 刘小明, 唐星华, 刘贤林, 谢伟杰. 白光LED用蓝光纳米晶荧光粉(Ba,Ca)5(PO4)2SiO4:Eu2+的制备及性能研究[J]. 南昌航空大学学报(自然科学版), 2018, 32(2): 49-54. DOI: 10.3969/j.issn.1001-4926.2018.02.007
引用本文: 冯景春, 李益祖, 刘小明, 唐星华, 刘贤林, 谢伟杰. 白光LED用蓝光纳米晶荧光粉(Ba,Ca)5(PO4)2SiO4:Eu2+的制备及性能研究[J]. 南昌航空大学学报(自然科学版), 2018, 32(2): 49-54. DOI: 10.3969/j.issn.1001-4926.2018.02.007
FENG Jing-chun, LI Yi-zu, LIU Xiao-ming, TANG Xing-hua, LIU Xian-lin, XIE Wei-jie. Synthesis and Photoluminescence Properties of Blue-Color Emitting Nanocrystalline Phosphors (Ba,Ca)5(PO4)2SiO4:Eu2+ for White Light-Emitting Devices[J]. Journal of nanchang hangkong university(Natural science edition), 2018, 32(2): 49-54. DOI: 10.3969/j.issn.1001-4926.2018.02.007
Citation: FENG Jing-chun, LI Yi-zu, LIU Xiao-ming, TANG Xing-hua, LIU Xian-lin, XIE Wei-jie. Synthesis and Photoluminescence Properties of Blue-Color Emitting Nanocrystalline Phosphors (Ba,Ca)5(PO4)2SiO4:Eu2+ for White Light-Emitting Devices[J]. Journal of nanchang hangkong university(Natural science edition), 2018, 32(2): 49-54. DOI: 10.3969/j.issn.1001-4926.2018.02.007

白光LED用蓝光纳米晶荧光粉(Ba,Ca)5(PO4)2SiO4:Eu2+的制备及性能研究

Synthesis and Photoluminescence Properties of Blue-Color Emitting Nanocrystalline Phosphors (Ba,Ca)5(PO4)2SiO4:Eu2+ for White Light-Emitting Devices

  • 摘要: 采用溶胶-凝胶法合成了一系列的(Ba,Ca)5(PO42SiO4:Eu2+荧光粉。所制备的荧光粉通过X射线衍射(XRD),场发射扫描电镜(FE-SEM)和光致发光(PL)进行表征。XRD测试结果表明:样品的成相温度为900℃,少量掺杂Eu2+离子或改变Ba2+,Ca2+离子的相对含量不影响基质晶体结构和相纯度。在紫外光激发下,荧光粉(Ba,Ca)5(PO42SiO4:Eu2+呈蓝光宽带发射(400~550 nm,源于Eu2+离子的4f7-4f65d1跃迁)。进一步研究表明:(Ba,Ca)5(PO42SiO4:Eu2+的发光颜色可以通过调整Ba2+与Ca2+离子的相对比例从深蓝光-蓝光-浅蓝光进行调控。通过精确调整Eu2+的浓度,在荧光粉(Ba0.99Ca0.015(PO42SiO4:Eu2+中可实现高品质蓝光发射。所制备的(Ba,Ca)5(PO42SiO4:Eu2+荧光粉在LED植物照明和白光LED领域具有潜在的应用价值。

     

    Abstract: A series of (Ba,Ca)5(PO4)2SiO4:Eu2+ nanocrystalline phosphors were synthesized via a citrate sol-gel synthesis method. XRD, FE-SEM, and PL were exploited to characterize the crystal structure and luminescence properties of the prepared phosphors. The XRD results indicated that the pure Ba5(PO4)2SiO4 phase can be obtained at 900 ℃, and there is no crystal lattice perturbation induced by changing the doping the concentration ions Eu2+ and relative ratio of Ba2+ to Ca2+. Under the excitation of ultraviolet light, the (Ba,Ca)5(PO4)2SiO4:Eu2+ nanocrystalline phosphors consist of a broad band in the range of 400~550 nm due to the 4f65d1-4f7(8S7/2) charge transfer transitions of Eu2+ ions. The luminescence color of (Ba,Ca)5(PO4)2SiO4:Eu2+ nanocrystalline phosphors can be tuned from deep blue to blue by changing the relative ratio of Ba2+ to Ca2+. High quality blue light emission can be achieved in the phosphor (Ba0.99Ca0.01)5(PO4)2SiO4:Eu2+ by accurately adjusting the doping concentration of Eu2+ ions. The obtained blue phosphor (Ba,Ca)5(PO4)2SiO4:Eu2+ might be the promising candidates for UV-pumped white light-emitting devices and plant lighting.

     

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