Volume 5 Issue 3
Jun.  2012
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ZHANG Jia-hua, LV Wei, HAO Zhen-dong, ZHANG Xia, LUO Yong-shi. Color-tunable white-light emitting BaMg2 Al6 Si9 O30 ∶ Eu2+ ,Tb3+ ,Mn2+ phosphors via energy transfer(Invited)[J]. Chinese Optics, 2012, 5(3): 203-208. doi: 10.3788/CO.20120503.0203
Citation: ZHANG Jia-hua, LV Wei, HAO Zhen-dong, ZHANG Xia, LUO Yong-shi. Color-tunable white-light emitting BaMg2 Al6 Si9 O30 ∶ Eu2+ ,Tb3+ ,Mn2+ phosphors via energy transfer(Invited)[J]. Chinese Optics, 2012, 5(3): 203-208. doi: 10.3788/CO.20120503.0203

Color-tunable white-light emitting BaMg2 Al6 Si9 O30 ∶ Eu2+ ,Tb3+ ,Mn2+ phosphors via energy transfer(Invited)

  • Received Date: 12 Jan 2012
  • Rev Recd Date: 16 Mar 2012
  • Publish Date: 10 Jun 2012
  • Single-phase white-light emitting phosphors BaMg2Al6Si9O30∶ Eu2+,Tb3+,Mn2+ are synthesized by solid state reaction. The energy transfers from Eu2+ to Tb3+ and Eu2+ to Mn2+ in BaMg2Al6Si9O30 are demonstrated by fluorescent spectra, energy transfer efficiency and fluorescent life time analysis. The BaMg2Al6Si9O30∶ Eu2+,Tb3+,Mn2+ shows three emitting colors: 450, 542 and 610 nm, which are assigned to the contribution from Eu2+, Tb3+ and Mn2+, respectively. By tuning the relative composition of Tb3+/Mn2+, chromaticity coordinates of (0.31, 0.30), color rendering index Ra=90 and Correlated Color Temperature(CCT) of 5 374 K can be achieved upon the excitation of UV light. Experimental results indicate that the present phosphor BaMg2Al6Si9O30∶ Eu2+,Tb3+,Mn2+ can serve as potential candidates for light emitting diodes.

     

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