title: Optical spectroscopy of the Ce-doped multicomponent garnets.
abstract: Here, we report our results referring to the preparation of Ce doped Y2.22MgGa2Al2SiO12, Y1.93MgAl4SiO12 and Y2.22Gd0.75Ga2Al3O12 using solid state reaction at high temperature. Several complementary methods (i.e. powder x-ray diffraction (XRPD), energy dispersive analysis of X-rays (EDX), scanning electron microscopy (SEM) and Fourier transforms infrared spectroscopy (FTIR)) were studied to examine the effects of the synthesis procedure on the morphology and structure. XRD analyses revealed that all compounds include yttrium aluminate phase with garnet structure. Cathodoluminescence (CL), radioluminescence (RL) and photoluminescence (PL) measurements were carried out for clarification of relationship between host lattice defects and the spectral luminescence emissions. Luminescence emission of phosphors is peaked at 530nm assigned to 5d-4f transitions of the dopant Ce(3+) ions with a broad emission band in 400-700nm range. Under electron irradiation, the emission spectrum of Ce doped (YGd)3Ga2Al3O12 is well defined and has a characteristic fairly narrow and sharp emission band peaking at 312nm and 624nm corresponding to transition of (6)P7/2 →(8)S7/2 and (6)GJ→(6)PJ (Gd(3+)), respectively. We suggest some of phosphors might be excellent phototherapy phosphor materials under electron excitation.
authors.affiliation: Nigde University, Faculty of Arts and Sciences, Physics Department, Nigde, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Canimoglu
authors.affiliation: Celal Bayar University, Faculty of Arts and Sciences, Department of Physics, Manisa, Turkey.
authors.forename: Y
authors.initials: Y
authors.lastname: Karabulut
authors.affiliation: Celal Bayar University, Faculty of Arts and Sciences, Department of Physics, Manisa, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Ayvacikli
authors.affiliation: Babes-Bolyai University, Raluca Ripan Institute for Research in Chemistry, Fantanele 30, 400294 Cluj-Napoca, Romania.
authors.forename: L E
authors.initials: LE
authors.lastname: Muresan
authors.affiliation: Babes-Bolyai University, Raluca Ripan Institute for Research in Chemistry, Fantanele 30, 400294 Cluj-Napoca, Romania.
authors.forename: I
authors.initials: I
authors.lastname: Perhaita
authors.affiliation: Babes-Bolyai University, Electronic Microscopy Centre, Clinicilor 37, 400006 Cluj Napoca, Romania.
authors.forename: L
authors.initials: L
authors.lastname: Barbu-Tudoran
authors.affiliation: Museo Nacional Ciencias Naturales, Jose Gutierrez Abascal 2, Madrid 28006, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Garcia Guinea
authors.affiliation: Ege University, Institute of Nuclear Sciences, 35100 Izmir, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Karali
authors.affiliation: Celal Bayar University, Faculty of Arts and Sciences, Department of Physics, Manisa, Turkey; Physics Department, Jazan University, P.O. Box 114, Jazan, Saudi Arabia.
authors.forename: N
authors.initials: N
authors.lastname: Can
keywords: FTIR; Luminescence; Rare earth; XRD; Yttrium aluminate