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Effects of Ce doping on the luminescent property of Ca 3 SiO 4 Cl 2 :Eu phosphor for green lighting
Author(s) -
Chen Jingsheng
Publication year - 2015
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2707
Subject(s) - phosphor , luminescence , light emitting diode , doping , energy transfer , quantum efficiency , materials science , green light , analytical chemistry (journal) , diode , optoelectronics , chemistry , blue light , chromatography , molecular physics
White light‐emitting diodes (LEDs) for green lighting are new solutions for energy saving and environmental protection. Ca 3 SiO 4 Cl 2 :Ce,Eu is an efficient phosphor for white LEDs. Effective energy transfer from Ce 3+ to Eu 2+ occurs in Ca 3 SiO 4 Cl 2 :Ce,Eu due to good spectrum overlap between the emission band of Ca 3 SiO 4 Cl 2 :Ce and the excitation band of Ca 3 SiO 4 Cl 2 :Eu, and hues vary systematically from blue to green at different Ce concentrations. A great improvement in the luminescent property of Ca 3 SiO 4 Cl 2 :Eu has been observed on Ce 3+ doping, which is attributed to energy transfer from Ce 3+ to Eu 2+ and an increase in the number of luminescent centers (Eu 2+ ) on Ce doping. The optimal sample has a quantum efficiency of up to 75%, and can be an efficient green phosphor for white LEDs. Copyright © 2014 John Wiley & Sons, Ltd.