title: Synthesis, structural and luminescence properties of Mn doped ZnO/Zn2SiO4 composite microphosphor.
abstract: Manganese doped ZnO/Zn2SiO4 (MZS) composite phosphors were successfully prepared by conventional solid state reaction method. The structural and optical properties of as-prepared samples were analysed by means of XRD, SEM, PLE and PL. The result shows that the samples consist of both ZnO and ZnSiO4 phases which confirms the composite phosphor. The strain acting on the phosphor is found to be in the range of 0.0040-0.0058 for different concentration of Mn(2+) doping. The doping of Mn(2+) significantly influences the optical properties of phosphor. Under 266 nm laser excitation samples show green emission (∼530 nm) and with 355 nm laser excitation blue emission (∼441 nm) is shown. The enhancement of luminescence intensity is achieved with Mn(2+) doping up to an optimum concentration (10 at.%) and then decreases. On 266 nm excitation, blue emission intensity decreases with Mn(2+) doping. This composite phosphor shows both blue and green emission under different excitations.
authors.affiliation: Department of Physics, Andhra University, Visakhapatnam 530003, India. Electronic address: rkpuligadda@gmail.com.
authors.forename: P V
authors.initials: PV
authors.lastname: Ramakrishna
authors.affiliation: Department of Physics, Andhra University, Visakhapatnam 530003, India.
authors.forename: D B R K
authors.initials: DB
authors.lastname: Murthy
authors.affiliation: Department of Physics, Andhra University, Visakhapatnam 530003, India.
authors.forename: D L
authors.initials: DL
authors.lastname: Sastry
authors.affiliation: Department of Physics, Andhra University, Visakhapatnam 530003, India.
authors.forename: K
authors.initials: K
authors.lastname: Samatha
mesh_terms: D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D017655:Silicon Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D017655:Silicon Compounds; D008345:Manganese; D015034:Zinc Oxide
keywords: CIE colour coordinates; Composite phosphor; Optical properties; Strain