Eu2+-Doped High-Temperature Phase Ca3SiO4Cl2 A Yellowish Orange Phosphor for White Light-Emitting Diodes

In this paper, we synthesized a novel yellowish orange phosphor, Eu2+-doped high-temperature phase (HTP) Ca3SiO4Cl2 at 1020DGC. The primary crystal structure of HTP-Ca3SiO4Cl2 is determined as monoclinic structure with a space group of 14 P2+/c. The excitation spectrum of Eu2+-doped HTP-Ca3SiO4Cl2 e...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2005-01, Vol.152 (11), p.G880-G884
Main Authors: Liu, Jie, Lian, Hongzhou, Shi, Chunshan, Sun, Jiayue
Format: Article
Language:English
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Summary:In this paper, we synthesized a novel yellowish orange phosphor, Eu2+-doped high-temperature phase (HTP) Ca3SiO4Cl2 at 1020DGC. The primary crystal structure of HTP-Ca3SiO4Cl2 is determined as monoclinic structure with a space group of 14 P2+/c. The excitation spectrum of Eu2+-doped HTP-Ca3SiO4Cl2 exhibits a broad-band between 250 and 500 nm with three peaks of around 327, 371, and 426 nm, which are coupled well with the near-UV (n-UV) or deep blue emission of GaN-based lightemitting diodes (LEDs). Its emission spectrum shows a single intense broad emission band centered at 572 nm. The measured chromaticity of yellowish orange luminescence is x = 0.52, y = 0.45. Eu2+-doped HTP-Ca3SiO4Cl2 would be suitable for yellowish orange phosphor of white LED because HTP-Ca3SiO4Cl2:Eu2+ is excellent in the excitation spectral profile and the chromaticity.
ISSN:0013-4651
DOI:10.1149/1.2060665