期刊
JAPANESE JOURNAL OF APPLIED PHYSICS
卷 49, 期 10, 页码 -出版社
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/JJAP.49.100203
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To understand how multiple phosphors in a mixture or stacked layers affect the performance of the remote-phosphor scattered photon extraction (SPE)'' white light-emitting diode (LED), a laboratory study was conducted with commercial yellow [quantum efficiency (QE) = 0.91] and red (QE = 0.59) phosphors in equal amounts. The highest light output was obtained when the longer-wavelength red phosphor was placed as the second layer. Experiments showed that when using two phosphors in an SPE package, several factors influence the performance: mixture or stacked layers; specific layer order; phosphor densities; phosphor external QE; overall spectral power distribution (SPD); phosphor excitation and emission spectra and efficiencies. (C) 2010 The Japan Society of Applied Physics
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