Photoluminescent properties of yellow emitting Ca(1-x)Eu(x)Si(2)O(2-delta)N(2+2 delta/3) phosphors for white light-emitting diodes

	Photoluminescent properties of yellow emitting Ca(1-x)Eu(x)Si(2)O(2-delta)N(2+2 delta/3) phosphors for white light-emitting diodes
其他题名	论文其他题名
	Wang M. Y.; Zhang J. H.; Zhang X.; Luo Y. S.; Ren X. G.; Lu S. Z.; Liu X. R.; Wang X. J.
	2008
发表期刊	Journal of Physics D-Applied Physics
ISSN	0022-3727
卷号	41 期号:20
摘要	Ca(1-x)Eu(x)Si(2)O(2-delta)N(2+2 delta/3) phosphors with Eu(2+) concentration (x) in the range of 0 - 0.25 are synthesized by solid-state reaction. With increasing x, the energy dispersive spectra show that the O/N ratio increases from 0.54 to 1.43 and the emission and excitation spectra show a redshift due to increased splitting of the low-lying 4f(6)5d(1) state of Eu(2+). An additional excitation band appears at around 460 nm for high doping concentrations of Eu(2+), perfectly matching the emission wavelength of blue light-emitting diodes (LEDs). The phosphors can be excited in the near-UV to blue region to emit a broad yellow band in the range 543 - 562 nm, which depends on x. A white LED is fabricated by combining the Ca(0.85)Eu(0.15)Si(2)O(2-delta)N(2+2 delta/3) phosphor with a blue GaN chip. Under 20mA forward-bias current, a CIE chromaticity coordinate of (0.3396, 0.3474), the corresponding colour temperature (T(c)) of 5223 K, the colour rendering index of 74 and luminous efficiency of 20 lm W(-1) are obtained.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24856
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Wang M. Y.,Zhang J. H.,Zhang X.,et al. Photoluminescent properties of yellow emitting Ca(1-x)Eu(x)Si(2)O(2-delta)N(2+2 delta/3) phosphors for white light-emitting diodes[J]. Journal of Physics D-Applied Physics,2008,41(20).
APA	Wang M. Y..,Zhang J. H..,Zhang X..,Luo Y. S..,Ren X. G..,...&Wang X. J..(2008).Photoluminescent properties of yellow emitting Ca(1-x)Eu(x)Si(2)O(2-delta)N(2+2 delta/3) phosphors for white light-emitting diodes.Journal of Physics D-Applied Physics,41(20).
MLA	Wang M. Y.,et al."Photoluminescent properties of yellow emitting Ca(1-x)Eu(x)Si(2)O(2-delta)N(2+2 delta/3) phosphors for white light-emitting diodes".Journal of Physics D-Applied Physics 41.20(2008).

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