Phosphor

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Baiqi Shao - One of the best experts on this subject based on the ideXlab platform.

  • a novel efficient mn4 activated ca14al10zn6o35 Phosphor application in red emitting and white leds
    Inorganic Chemistry, 2014
    Co-Authors: Qi Zhao, Mengmeng Jiao, Baiqi Shao, Hongpeng You
    Abstract:

    A new, highly efficient deep red-emitting Phosphor Ca14Al10Zn6O35:Mn4+ was developed as a component of solid-state white light-emitting diodes (LEDs). The structural and optical characterization of the Phosphor is described. The Phosphor exhibits strong emission in the range of 650–700 nm when excited by 460 nm excitation, with a quantum efficiency approaching 50%. Concentration dependence of Mn4+ luminescence in Ca14Al10Zn6O35:Mn4+ is investigated. Attempts to understand the thermal stability on the basis of the thermal quenching characteristics of Ca14Al10Zn6O35:Mn4+ is presented. The results suggest that Phosphors deriving from Ca14Al10Zn6O35:Mn4+ have potential application for white LEDs. In addition, influence of cation substitution on the luminescence intensity of these Phosphors is elucidated.

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Wei Lu, Wenzhen Lv, Qi Zhao, Baiqi Shao
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Qi Zhao, Baiqi Shao, Ning Guo, Yongchao Jia, Hongpeng You
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

Mengmeng Jiao - One of the best experts on this subject based on the ideXlab platform.

  • a novel efficient mn4 activated ca14al10zn6o35 Phosphor application in red emitting and white leds
    Inorganic Chemistry, 2014
    Co-Authors: Qi Zhao, Mengmeng Jiao, Baiqi Shao, Hongpeng You
    Abstract:

    A new, highly efficient deep red-emitting Phosphor Ca14Al10Zn6O35:Mn4+ was developed as a component of solid-state white light-emitting diodes (LEDs). The structural and optical characterization of the Phosphor is described. The Phosphor exhibits strong emission in the range of 650–700 nm when excited by 460 nm excitation, with a quantum efficiency approaching 50%. Concentration dependence of Mn4+ luminescence in Ca14Al10Zn6O35:Mn4+ is investigated. Attempts to understand the thermal stability on the basis of the thermal quenching characteristics of Ca14Al10Zn6O35:Mn4+ is presented. The results suggest that Phosphors deriving from Ca14Al10Zn6O35:Mn4+ have potential application for white LEDs. In addition, influence of cation substitution on the luminescence intensity of these Phosphors is elucidated.

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Wei Lu, Wenzhen Lv, Qi Zhao, Baiqi Shao
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Qi Zhao, Baiqi Shao, Ning Guo, Yongchao Jia, Hongpeng You
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

Hongpeng You - One of the best experts on this subject based on the ideXlab platform.

  • a novel efficient mn4 activated ca14al10zn6o35 Phosphor application in red emitting and white leds
    Inorganic Chemistry, 2014
    Co-Authors: Qi Zhao, Mengmeng Jiao, Baiqi Shao, Hongpeng You
    Abstract:

    A new, highly efficient deep red-emitting Phosphor Ca14Al10Zn6O35:Mn4+ was developed as a component of solid-state white light-emitting diodes (LEDs). The structural and optical characterization of the Phosphor is described. The Phosphor exhibits strong emission in the range of 650–700 nm when excited by 460 nm excitation, with a quantum efficiency approaching 50%. Concentration dependence of Mn4+ luminescence in Ca14Al10Zn6O35:Mn4+ is investigated. Attempts to understand the thermal stability on the basis of the thermal quenching characteristics of Ca14Al10Zn6O35:Mn4+ is presented. The results suggest that Phosphors deriving from Ca14Al10Zn6O35:Mn4+ have potential application for white LEDs. In addition, influence of cation substitution on the luminescence intensity of these Phosphors is elucidated.

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Qi Zhao, Baiqi Shao, Ning Guo, Yongchao Jia, Hongpeng You
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

Qi Zhao - One of the best experts on this subject based on the ideXlab platform.

  • a novel efficient mn4 activated ca14al10zn6o35 Phosphor application in red emitting and white leds
    Inorganic Chemistry, 2014
    Co-Authors: Qi Zhao, Mengmeng Jiao, Baiqi Shao, Hongpeng You
    Abstract:

    A new, highly efficient deep red-emitting Phosphor Ca14Al10Zn6O35:Mn4+ was developed as a component of solid-state white light-emitting diodes (LEDs). The structural and optical characterization of the Phosphor is described. The Phosphor exhibits strong emission in the range of 650–700 nm when excited by 460 nm excitation, with a quantum efficiency approaching 50%. Concentration dependence of Mn4+ luminescence in Ca14Al10Zn6O35:Mn4+ is investigated. Attempts to understand the thermal stability on the basis of the thermal quenching characteristics of Ca14Al10Zn6O35:Mn4+ is presented. The results suggest that Phosphors deriving from Ca14Al10Zn6O35:Mn4+ have potential application for white LEDs. In addition, influence of cation substitution on the luminescence intensity of these Phosphors is elucidated.

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Wei Lu, Wenzhen Lv, Qi Zhao, Baiqi Shao
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

  • tunable blue green emitting ba3lana po4 3f eu2 tb3 Phosphor with energy transfer for near uv white leds
    Inorganic Chemistry, 2013
    Co-Authors: Mengmeng Jiao, Qi Zhao, Baiqi Shao, Ning Guo, Yongchao Jia, Hongpeng You
    Abstract:

    A series of Eu2+ and Eu2+/Tb3+ activated novel Ba3LaNa(PO4)3F Phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained Phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obtained Phosphors can be efficiently excited in the range from 320 to 430 nm, which matches perfectly with the commercial n-UV LED chips. The critical distance of the Eu2+ ions in Ba3LaNa(PO4)3F:Eu2+ is calculated and the energy quenching mechanism is proven to be dipole–dipole interaction. Tunable blue-green emitting Ba3LaNa(PO4)3F:Eu2+,Tb3+ Phosphor has been obtained by co-doping Eu2+ and Tb3+ ions into the host and varying their relative ratios. Compared with the Tb3+ singly doped Phosphor, the codoped Phosphors have more intense absorption in the n-UV range and stronger emission of the Tb3+ ions, which are attributed to the effective energy transfer from the Eu2+ to Tb3+ ions. The energy transfer ...

Xiaobing Luo - One of the best experts on this subject based on the ideXlab platform.

  • A complementary study to "toward scatter-free Phosphors in white Phosphor-converted light-emitting diodes:" comment.
    Optics express, 2013
    Co-Authors: Yong Zou, Xiaobing Luo
    Abstract:

    In a recent paper, Park et al. [Opt. Express 20(9), 10218 (2012)] demonstrated that large micro-size cube Phosphors are an outstanding potential candidate for scatter-free Phosphors in white Phosphor-converted light-emitting diodes (pc-LEDs). They found that large micro-size cube Phosphors can lead to higher luminous efficiency (LE), higher packaging efficiency (PE), and reduced influences of ambient temperature and applied current. In this comment, we further discussed the large micro-size Phosphors on the angular color uniformity (ACU). It is found that when the Phosphor particle size increases from 30 μm to 100 μm, the ACU decreases from 0.91 to 0.86.

  • Study on Phosphor sedimentation effect in white light-emitting diode packages by modeling multi-layer Phosphors with the modified Kubelka-Munk theory
    Journal of Applied Physics, 2013
    Co-Authors: Yiman Wang, Sheng Liu, Xing Chen, Yong Zou, Xiaobing Luo
    Abstract:

    In this study, we studied the Phosphor sedimentation effect in white Phosphor-converted light-emitting diode packages by modeling the multi-layer Phosphors with gradient concentrations. The essence of Phosphor sedimentation can attribute to the variation of Phosphor concentrations. By modifying the Kubelka-Munk theory, we built a multi-layer Phosphor model with considering the light scattering, light absorption, and light conversion process simultaneously. With a brief review of Kubelka-Munk theory, multi-layer Phosphors were modeled on the basis of single-layer Phosphor model. The Phosphor sedimentation effect was characterized by modeling multi-layer Phosphors with gradient concentrations, whereas keeping the total amount of Phosphors at the same level. It is found from the five calculation cases that Phosphor sedimentation will cause the drop of light extraction efficiency (LEE) by 13.04%. Furthermore, the Phosphor layer with inverse-gradient concentrations will enhance the LEE 16.56%. To figure out the reasons, the light losses were calculated, and it is proved that the light loss is enhanced when Phosphor sedimentation happens.