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Direct white-light from core-shell-like sphere with Sr3Mg-Si2O8: Eu2+, Mn2+ coated on Sr2SiO4:Eu2+

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Abstract

A method of color mixture for white light is presented with Sr3MgSi2O8:Eu2+, Mn2+ shell coated on Sr2SiO4:Eu2+ core by spray pyrolysis procedure. Upon near ultraviolet (NUV) excitation, a 550 nm band emission of Eu2+ from core host combines with the simultaneous emissions of Eu2+ at 457 nm and Mn2+ at 683 nm based on energy transfer in the shell lattice to generate warm white light with color rendering index (CRI) of 91. With such a core-shell-like structure, the re-absorption of blue light from shell layer can be effectively suppressed, and the chemical stability of the phosphor is verified experimentally to be superior to that of the Sr2SiO4:Eu2+. This new proposed phosphor provides great potential in the color mixture of blending-free phosphor converted white NUV light emitting diode (LED) devices.

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Authors and Affiliations

  1. Key Lab. of Display Materials & Photoelectronic Devices, Ministry of Education, Tianjin University of Technology, Tianjin, 300384, China

    Jian Li  (李建) & Da-jian Wang  (王达健)

  2. School of Science, Tianjin University of Technology, Tianjin, 300384, China

    Jian Li  (李建) & Jia-chun Deng  (邓家春)

  3. Institute of Materials Physics, Tianjin University of Technology, Tianjin, 300384, China

    Qi-fei Lu  (陆启飞) & Da-jian Wang  (王达健)

Authors
  1. Jian Li  (李建)
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  2. Jia-chun Deng  (邓家春)
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  3. Qi-fei Lu  (陆启飞)
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  4. Da-jian Wang  (王达健)
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Corresponding author

Correspondence to Jia-chun Deng  (邓家春).

Additional information

This work has been supported by the National Natural Science Foundation of China (Nos.21076161, 50802062 and 50872091).

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Li, J., Deng, Jc., Lu, Qf. et al. Direct white-light from core-shell-like sphere with Sr3Mg-Si2O8: Eu2+, Mn2+ coated on Sr2SiO4:Eu2+ . Optoelectron. Lett. 9, 293–296 (2013). https://doi.org/10.1007/s11801-013-3070-y

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  • DOI: https://doi.org/10.1007/s11801-013-3070-y

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