Luminescence and energy transfer of Eu- and Mn-coactivated CaAl 2Si2O8 as a potential phosphor for white-light UVLED

Woan Jen Yang, Liyang Luo, Teng-Ming Chen*, Niann-Shiah Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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A series of Eu2+- and Mn2+-coactivated CaAl 2Si2O8 phosphors have been synthesized at 1400°C under a reduced atmosphere and their luminescence properties have been investigated as a function of activator and coactivator concentrations. We have discovered that energy transfers from Eu2+ to Mn2+ by directly observing significant overlap of the excitation spectrum of Mn 2+ and the emission spectrum of Eu2+ as well as the systematic relative decline and growth of emission bands of Eu2+ and Mn2+, respectively. The critical distance and average separation of Eu2+ and Mn2+ have also been calculated. By utilizing the principle of energy transfer, we have also demonstrated that with appropriate tuning of activator content CaAl2Si2O8:Eu 2+,Mn2+ phosphors exhibit great potential to act as a phosphor for white-light ultraviolet light-emitting diodes (UVLEDs).

Original languageEnglish
Pages (from-to)3883-3888
Number of pages6
JournalChemistry of Materials
Issue number15
StatePublished - 26 Jul 2005

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