Barium-stabilized Sr_2Al_xSi_<12-x>N_<16-x>O_<x+2>:Eu Green Phosphor for White Light UVLED
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We discovered the stabilization effect of only 1 wt % Ba on synthesizing Eu<SUP>2+</SUP>-doped pure Sr–S-phase(Sr<SUB>2</SUB>Al<I><SUB>x</SUB></I>Si<SUB>12−<I>x</I></SUB>N<SUB>16−<I>x</I></SUB>O<SUB><I>x</I>+2</SUB>) under a moderate condition and studied their luminescent properties. The excitation band is at UV–vis spectral region which is about 300–370 nm, and the emission band at 508–538 nm. The emission wavelength changes from 508 to 538 nm as a function of Eu<SUP>2+</SUP> concentration, and the maximum emission intensity could be obtained with the Eu<SUP>2+</SUP> concentration of 0.2. This phosphor can be the potential candidate for using as the green phosphor for UVLED-based white light.
- Chemistry Letters
Chemistry Letters 37(5), 498-499, 2008-05-05
The Chemical Society of Japan