Journal
OPTICS EXPRESS
Volume 23, Issue 7, Pages A292-A298Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.00A292
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Funding
- National High Technology Research and Development Program 863 [2013AA03A116]
- Chinese Academy of Sciences [KZCC-EW-106]
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We dope Gd3+ ions into Ce: YAG ceramics to induce red-shift in the photoluminescence, of which the degree is proportional to the Gd3+ doping concentration. This kind of ceramic, when collaborating with InGaN blue chips, proves to be a promising fluorescent material of white light-emitting diodes, for not only its high in-line transmittance and decent quantum yield, but also the improvement in color rendering ability brought by the red-shift, which enhances the ratio of red portion in spectra. We demonstrate that 10% is the optimized value of Gd3+ doping concentration, as it provides the maximum color rendering index of similar to 78 with luminous efficiency as high as 128 lm/W. (C) 2015 Optical Society of America
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