title: Photo-, cathodo- and thermoluminescent properties of dysprosium-doped HfO2 films deposited by ultrasonic spray pyrolysis.
abstract: In this work, the photoluminescent (PL), cathodoluminescent (CL) and thermoluminescent (TL) properties of hafnium oxide films doped with trivalent dysprosium ions are reported. The films were deposited on glass substrates at temperatures ranging from 300 to 600°C, using chlorides as precursor reagents. The surface morphology of films showed a veins shaped microstructure at low deposition temperatures, while at higher temperatures the formation of spherical particles was observed on the surface. X-ray diffraction showed the presence of HfO2 monoclinic phase in the films deposited at temperatures greater than 400°C. The PL and CL spectra of the doped films showed the highest emission band centered at 575nm corresponding to the transitions (4)F9/2→(6)H13/2, which is a characteristic transition of Dy(3+) ion. The greatest emission intensities were observed in samples doped with 1 atomic percent (at%) of DyCl3 in the precursor solution. Regarding the TL behavior, the glow curve of HfO2:Dy(+3) films exhibited spectrum with one broad band centered at about 150°C. The highest intensity TL response was observed on the films deposited at 500°C.
authors.affiliation: Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional, Unidad Legaria, Calzada Legaria 694, Colonia Irrigación, C.P. 11500 México, D.F., Mexico.
authors.forename: R Reynoso
authors.initials: RR
authors.lastname: Manríquez
authors.affiliation: Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional, Unidad Legaria, Calzada Legaria 694, Colonia Irrigación, C.P. 11500 México, D.F., Mexico.
authors.forename: J A I Díaz
authors.initials: JA
authors.lastname: Góngora
authors.affiliation: Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional, Unidad Legaria, Calzada Legaria 694, Colonia Irrigación, C.P. 11500 México, D.F., Mexico.
authors.forename: J
authors.initials: J
authors.lastname: Guzmán-Mendoza
authors.affiliation: Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional, Unidad Legaria, Calzada Legaria 694, Colonia Irrigación, C.P. 11500 México, D.F., Mexico.
authors.forename: T Rivera
authors.initials: TR
authors.lastname: Montalvo
authors.affiliation: Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional, Unidad Legaria, Calzada Legaria 694, Colonia Irrigación, C.P. 11500 México, D.F., Mexico.
authors.forename: J C Guzmán
authors.initials: JC
authors.lastname: Olguín
authors.affiliation: Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada del Instituto Politécnico Nacional, Unidad Legaria, Calzada Legaria 694, Colonia Irrigación, C.P. 11500 México, D.F., Mexico.
authors.forename: P V Cerón
authors.initials: PV
authors.lastname: Ramírez
authors.affiliation: Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, D.F., Mexico.
authors.forename: M
authors.initials: M
authors.lastname: García-Hipólito
authors.affiliation: Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, A.P. 14-740, México 07360, D.F., Mexico.
authors.forename: C
authors.initials: C
authors.lastname: Falcony
keywords: HfO(2):Dy(3+) films; Luminescence; Spray pyrolysis; Thermoluminescence; UV radiation