title: Enhanced luminescence in SrMgAl(x)O(17±δ):yMn4+ composite phosphors.
abstract: Red-emitting SrMgAlxO17±δ:yMn(4+) composite phosphors (x=10-100; y=0.05-4.0 mol%) are synthesized by solid-state reaction method in air. Addition of Al2O3 leads to the formation of two concomitant phases, i.e., SrMgAl10O17 and Al2O3 phases in the composite phosphor. Red emission from Mn(4+) ions in the composite phosphors is greatly enhanced due to multiple scattering and absorption of excitation light between SrMgAl10O17 and Al2O3 phases. SrMgAlxO17±δ:yMn(4+) composite phosphors would be a promising candidate as red phosphor in the application of a 397 nm near UV-based W-LED.
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: Renping
authors.initials: R
authors.lastname: Cao
authors.forename: Kaniyarakkal N
authors.initials: KN
authors.lastname: Sharafudeen
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D010087:Oxides; D010758:Phosphorus; D008345:Manganese; D000535:Aluminum; D008274:Magnesium; D013324:Strontium
keywords: Mn(4+) luminescence; Optical properties; Phosphors; White light-emitting diode