title: Synthesis of AlN: Eu2+green phosphors by a simple direct nitridation method.
abstract: Eu-doped aluminum nitride phosphors were successfully prepared using simple direct nitridation of a metallic aluminum and Eu2O3powder mixture in flowing ammonia. AlN formed at reaction temperatures >900°C, and Eu3+transformed into the secondary oxide phase EuAl2O4in the nitridation condition. Phase pure AlN was obtained by post-heat treatment of the nitridated product at 1600°C for 3 h in a nitrogen atmosphere, with an Eu2+doping concentration < 0.5%. The phosphors exhibited broad green emission centered at 521 nm under 363 nm excitation. The luminescence of the phosphor was significantly influenced by the post-heat treatment temperature, which affected the dissolution of Eu2+, phase purity, crystallinity, and particle size of the AlN host.
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, China.|Institute of Materials Science & Technology, Chengdu University of Technology, Chengdu, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, China.|Institute of Materials Science & Technology, Chengdu University of Technology, Chengdu, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Li
authors.affiliation: Sichuan Sunfor Light Co., Ltd, Chengdu, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhao
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D049408:Luminescent Agents / Q000138:chemical synthesis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D049408:Luminescent Agents; D005063:Europium; D000535:Aluminum
keywords: aluminum nitride; ammonia; direct nitridation; phosphors; powder