| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Energy Transfer from Ce3+ to Eu2+ in LiSrBO3 and Its Potential Application in UV-LED-Based White LEDs |
WANG Zhi-Jun, LI Pan-Lai, YANG Zhi-Ping, GUO Qing-Lin, FU Guang-Sheng |
| College of Physics Science and Technology, Hebei University, Baoding 071002 |
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| Cite this article: |
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WANG Zhi-Jun, LI Pan-Lai, YANG Zhi-Ping et al 2009 Chin. Phys. Lett. 26 117802 |
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Abstract Ce3+/Eu2+ codoped LiSrBO3 phosphor is synthesized, and its luminescent characteristics are investigated. LiSrBO3:Ce3+,Eu2+ phosphor exhibits varied hues from blue to white and eventually to yellow by resonance-type energy transfer from Ce3+ ion to Eu2+ ion and tuning the relative proportion of Ce3+/Eu2+ properly. Energy transfer mechanism in LiSrBO3:Ce3+, Eu2+ phosphor is dominated by the dipole-dipole interaction, and the critical distance of the energy transfer is estimated to be about 2nm by both spectral overlap and concentration quenching methods. Under UV radiation, white light is generated by coupling 436 and 565nm emission bands attributed to Ce3+ and Eu2+ radiations, respectively.
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| Keywords:
78.55.-m
33.50.Dq
33.20.Kf
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Received: 06 August 2009
Published: 30 October 2009
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| PACS: |
78.55.-m
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(Photoluminescence, properties and materials)
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33.50.Dq
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(Fluorescence and phosphorescence spectra)
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33.20.Kf
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(Visible spectra)
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