title: Synthesis and luminescence of ZnMgS:Mn2+ nanoparticles.
abstract: Efficient green emission from ZnMgS:Mn2+ nanoparticles prepared by co-doping Mg2+ and Mn2+ ions into ZnS lattices has been observed. The synthesis is carried out in aqueous solution, followed by a post-annealing process, thus showing the features of less complexity, low cost, and easy incorporation of dopants. In comparison with the emission of ZnS:Mn2+ nanoparticles, which is located generally around 590 nm, the photoluminescence of ZnMgS:Mn2+ nanoparticles is blue-shifted by 14 nm in wavelength, leading to the enhanced green emission. The X-ray diffraction, electron spin resonance, and pressure dependent photoluminescence measurements suggest that the change of the crystal field caused by Mg2+ ionic doping and the lower symmetry in the nanoparticles may account for the blue-shift of the photoluminescence. The ZnMgS:Mn2+ nanoparticles with 1% Mn2+ doping exhibit the strongest luminescence, which could potentially meet the requirements for the construction of green light emitting diodes.
authors.affiliation: Nomadics Incorporated, 1024 South Innovation Way, Stillwater, OK 74074, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Fuhai
authors.initials: F
authors.lastname: Su
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Ramaswami
authors.initials: R
authors.lastname: Sammynaiken
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Westcott
authors.forename: David E
authors.initials: DE
authors.lastname: McCready
authors.forename: Guohua
authors.initials: G
authors.lastname: Li
authors.forename: Alan G
authors.initials: AG
authors.lastname: Joly
mesh_terms: D003460:Crystallization / Q000379:methods*; D004559:Electric Wiring; D004574:Electromagnetic Fields; D007477:Ions; D008027:Light; D049449:Luminescence; D008274:Magnesium / Q000032:analysis / Q000737:chemistry*; D008345:Manganese / Q000032:analysis / Q000737:chemistry*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D010777:Photochemistry / Q000295:instrumentation / Q000379:methods; D013440:Sulfides / Q000032:analysis / Q000737:chemistry*; D013499:Surface Properties; D014965:X-Rays; D017967:Zinc Compounds / Q000032:analysis / Q000737:chemistry*
chemical_list: D007477:Ions; D013440:Sulfides; D017967:Zinc Compounds; D008345:Manganese; D008274:Magnesium; C031238:zinc sulfide