Journal
JOURNAL OF LUMINESCENCE
Volume 136, Issue -, Pages 1-4Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2012.10.039
Keywords
YAG:Ce3+; Solid state lighting; White LED; Phosphors; Combustion synthesis; Luminescence
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Funding
- Department of Science and Technology, New Delhi for the Women Scientist award
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Most of the commercial white LED lamps use blue chip coated with yellow emitting phosphor. Use of blue excitable red and green phosphors is expected to improve CRI. Several phosphors such as SrGa2S4:Eu2+, (Sr,Ba)SiO4:Eu2+ have been suggested in the past as green components. However, there are issues of sensitivity and stability of such phosphors. Here, we describe gallium substituted YAG:Ce3+ phosphor as a green emitter. YAG structures are already accepted by the industry for the stability and efficiency. LED's with improved CRI could be fabricated by choosing Y3Al4GaO12:Ce3+ (green and yellow) and SrS:Eu2+ (red) phosphors along with blue chip. (C) 2012 Elsevier B.V. All rights reserved.
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