title: Effects of Ce doping on the luminescent property of Ca3 SiO4 Cl2 :Eu phosphor for green lighting.
abstract: White light-emitting diodes (LEDs) for green lighting are new solutions for energy saving and environmental protection. Ca3 SiO4 Cl2 :Ce,Eu is an efficient phosphor for white LEDs. Effective energy transfer from Ce(3+) to Eu(2+) occurs in Ca3 SiO4 Cl2 :Ce,Eu due to good spectrum overlap between the emission band of Ca3 SiO4 Cl2 :Ce and the excitation band of Ca3 SiO4 Cl2 :Eu, and hues vary systematically from blue to green at different Ce concentrations. A great improvement in the luminescent property of Ca3 SiO4 Cl2 :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.
authors.affiliation: College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, People's Republic of China.
authors.forename: Jingsheng
authors.initials: J
authors.lastname: Chen
mesh_terms: D002118:Calcium / Q000737:chemistry; D002563:Cerium / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry; D005063:Europium / Q000737:chemistry; D008029:Lighting; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements; D017640:Silicates / Q000737:chemistry
chemical_list: D002712:Chlorides; D049408:Luminescent Agents; D017640:Silicates; D002563:Cerium; D005063:Europium; D002118:Calcium
keywords: Ca3SiO4Cl2:Eu; Ce doping; energy transfer; green phosphor