期刊
OPTICS EXPRESS
卷 17, 期 9, 页码 7450-7457出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.007450
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- Information Display RD Center [F0004100-2008-31]
- Korea Science and Engineering Foundation grant funded by the Ministry of Education, Science and Technology [2008-03573]
- Korea Evaluation Institute of Industrial Technology (KEIT) [F0004100-2009-32] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Korea Institute of Industrial Technology(KITECH) [F0004100-2008-31] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Education, Science & Technology (MoST), Republic of Korea [R31-2008-000-10071-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2005-2002522, 핵09A3016] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper reports a simple approach for the design of blue-excitation-light passing and phosphor-yellow-emission-light reflecting dielectric multilayers to recycle the backward emission of Y3Al5O12:Ce3+ (YAG:Ce) yellow phosphors on top of a blue InGaN light-emitting diode (LED) cup. The insertion of modified quarter-wave films of alternate high-and low-refractive index dielectric films (TiO2/SiO2) into the interface between a YAG: Ce phosphor layer and glass substrate resulted in 1.64 and 1.95 fold increase in efficiency and luminous efficacy of the forward white emission compared with that of a conventional phosphor on top of a blue LED cup with a lower correlated color temperature (< 4000K). (c) 2009 Optical Society of America
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