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Chin. Phys. B, 2010, Vol. 19(12): 127808    DOI: 10.1088/1674-1056/19/12/127808
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

A red oxide phosphor, Sr2ScAlO5:Eu2+ with perovskite-type structure, for white light-emitting diodes

Zhou Tian-Liang(周天亮), Song Zhen(宋振), Song Xi-Ping(宋西平), Bian Liu(边柳), and Liu Quan-Lin(刘泉林)
School of Materials Science & Engineering and State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Abstract  Sr2ScAlO5:Eu2+, a red oxide phosphor with a perovskite-type structure, has been synthesized through a solid-state reaction and its luminescence properties have been investigated. An absorption band centering at 450 nm is observed from the diffuse reflection spectra and the excitation spectra, indicating that the phosphor can match perfectly with the blue light of InGaN light-emitting diodes. A broad red emission band at 620 nm is found from the emission spectra, originating from the 4f65d–4f7 transition of the Eu2+ ions. The best doping content of Eu in this material is about 5%. Sr2ScAlO5:Eu2+ is a highly promising red phosphor for use in white light-emitting diodes.
Keywords:  luminescence      red phosphor      Sr2ScAlO5:Eu2+      perovskite  
Received:  20 July 2010      Revised:  07 August 2010      Accepted manuscript online: 
PACS:  61.72.S- (Impurities in crystals)  
  78.55.Hx (Other solid inorganic materials)  
  85.60.Jb (Light-emitting devices)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 90922027), and the National High Technology Research and Development Program of China (Grant No. 2009AA03Z432).

Cite this article: 

Zhou Tian-Liang(周天亮), Song Zhen(宋振), Song Xi-Ping(宋西平), Bian Liu(边柳), and Liu Quan-Lin(刘泉林) A red oxide phosphor, Sr2ScAlO5:Eu2+ with perovskite-type structure, for white light-emitting diodes 2010 Chin. Phys. B 19 127808

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