| Abstract: | White light‐emitting diodes (LEDs) for green lighting are new solutions for energy saving and environmental protection. Ca3SiO4Cl2:Ce,Eu is an efficient phosphor for white LEDs. Effective energy transfer from Ce3+ to Eu2+ occurs in Ca3SiO4Cl2:Ce,Eu due to good spectrum overlap between the emission band of Ca3SiO4Cl2:Ce and the excitation band of Ca3SiO4Cl2:Eu, and hues vary systematically from blue to green at different Ce concentrations. A great improvement in the luminescent property of Ca3SiO4Cl2:Eu has been observed on Ce3+ doping, which is attributed to energy transfer from Ce3+ to Eu2+ and an increase in the number of luminescent centers (Eu2+) 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. |
