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An intense blue-emitting phosphor for near-ultraviolet pumped white-light-emitting diodes: Ce3+ -activated beta-Ca2SiO4
Hao Z. D.; Zhang J. H.; Zhang X.; Luo Y. S.; Zhang L. G.; Zhao H. F.
2014
发表期刊Journal of Luminescence
ISSNISBN/0022-2313
期号152页码:40-43
摘要More recently, Ce3+ activated gamma-Ca2SiO4 has been reported and it shows great potential application as a yellow-emitting phosphor for white LEDs. However, beta-Ca2SiO4, another known phase of Ca2SiO4, doped with Ce3+ is not available. It is interesting to know if beta-Ca2SiO4:Ce3+ can also be suitable for white LEDs. For this reason, we synthesized a series of beta-Ca2SiO4:Ce3+ phosphors by solid state reaction. beta-Ca2SiO4:Ce3+ exhibits an intense blue emission band peaked at 425 nm with a bandwidth of 68 nm which is attributed to the typical Ce3+ 4f(0)5d(1)-> 4f(1) transitions. The integral intensity of the concentration-optimized beta-Ca2SiO4:Ce3+ can be as high as 71% of the commercial BAM blue phosphor upon 360 nm excitation. The excitation spectra of beta-Ca2SiO4:Ce3+ consist of three broad bands with maxima at 252, 289 and 348 nm, which are ascribed to the 4f(1)-> 4f(0)5d(1) transitions of Ce3+. Thermal quenching property of beta-Ca2SiO4:Ce3+ was evaluated and the results show that the integral PL intensity at 150 degrees C maintains about 93% of that at room temperature. The excellent thermal stability and intense emission upon NUV light excitation suggest that beta-Ca2SiO4:Ce3+ can be used as a potential blue-emitting phosphor for NUV white LEDs. (C) 2013 Elsevier B.V. All rights reserved.
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/181722/43726
专题中科院长春光机所知识产出
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Hao Z. D.,Zhang J. H.,Zhang X.,et al. An intense blue-emitting phosphor for near-ultraviolet pumped white-light-emitting diodes: Ce3+ -activated beta-Ca2SiO4[J]. Journal of Luminescence,2014(152):40-43.
APA Hao Z. D.,Zhang J. H.,Zhang X.,Luo Y. S.,Zhang L. G.,&Zhao H. F..(2014).An intense blue-emitting phosphor for near-ultraviolet pumped white-light-emitting diodes: Ce3+ -activated beta-Ca2SiO4.Journal of Luminescence(152),40-43.
MLA Hao Z. D.,et al."An intense blue-emitting phosphor for near-ultraviolet pumped white-light-emitting diodes: Ce3+ -activated beta-Ca2SiO4".Journal of Luminescence .152(2014):40-43.
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