title: Dopant distribution and influence of sonication temperature on the pure red light emission of mixed oxide phosphor for solid state lighting.
abstract: In this study, europium doped yttrium gadolinium (Y1.4Gd0.5Eu0.1O3) mixed oxide phosphors were synthesized by a sonochemical method at different growth temperatures (50°C, 100°C, 150°C and 200°C) for pure red light emission applications. The compositional identification, presence of dopants and the distribution of doping materials in the crystal lattice was studied by TOF-SIMS. The formation and growth mechanisms in the sonochemical synthesis of Y1.4Gd0.5Eu0.1O3 nanophosphors are discussed in detail. Different spectral and Judd-Ofelt parameters were estimated from photoluminescence data. Optical gain and efficiency parameters were calculated with the variation of synthesis environment and an efficient synthesis method to make good red emitting phosphors for solid-state lighting and display applications were proposed.
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: S
authors.initials: S
authors.lastname: Som
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa. Electronic address: vj.phyics@gmail.com.
authors.forename: Vijay
authors.initials: V
authors.lastname: Kumar
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: Vinod
authors.initials: V
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: Mukut
authors.initials: M
authors.lastname: Gohain
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: Anurag
authors.initials: A
authors.lastname: Pandey
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: M M
authors.initials: MM
authors.lastname: Duvenhage
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: J J
authors.initials: JJ
authors.lastname: Terblans
authors.affiliation: Department of Chemistry, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa.
authors.forename: B C B
authors.initials: BCB
authors.lastname: Bezuindenhoud
authors.affiliation: Department of Physics, University of Free State, P.O. Box 339, Bloemfontein, ZA 9300, South Africa. Electronic address: swarthc@ufs.ac.za.
authors.forename: H C
authors.initials: HC
authors.lastname: Swart
keywords: Defects; Electron phonon coupling; Fluorescent quenching; Judd–Ofelt theory; Mixed oxides; Phosphor; Sonication temperature