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Title: Synthesis, characterization and optical properties of ATiO{sub 3}–Pr thin films prepared by a photochemical method (where A = Ba and Ca)

Highlights: • A method of photochemical deposition has been used to the preparation of (Ba,Ca)TiO{sub 3} thin films doped Pr(III). • The (Ba,Ca)TiO{sub 3}/Pr(III) films under 375 nm excitation shows emissions attributable to {sup 1}D{sub 2} → {sup 3}H{sub 4} transition of Pr ion. • These PL signals decreased above 10 mol% of Pr(III). • Analysis suggests the presence of intermediate energy levels in the band gap influences in the PL processes. - Abstract: This article reports the characterization and optical properties of (Ba,Ca)TiO{sub 3} thin films doped with Pr at different proportions (0–15 mol%). The films were deposited on Si (1 0 0) and quartz substrates using a photochemical method and post-annealed at 900 °C. The evaluation of photo-reactivity of the precursor complexes was monitored by UV–vis and FT-IR spectroscopy. The obtained films were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The results indicate that Ba, Ca, Ti, O and Pr are present in the form of perovskite. Under UV light excitation (375 nm) the (Ba,Ca)TiO{sub 3}–Pr films show the characteristic emissions ascribed to {sup 1}D{sub 2} → {sup 3}H{sub 4} transition of Pr{sup 3+} ion. The optical measurements show the presence of intermediate energy levels in themore » band gap which influence the emission processes.« less
Authors:
 [1] ; ; ;  [1] ; ;  [2] ;  [3] ; ;  [4]
  1. Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad del Bío-Bío, Chillán (Chile)
  2. Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso (Chile)
  3. Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago 8370415 (Chile)
  4. Departamento de Ingeniería de Materiales, Facultad de Ingeniería, Universidad de Concepción, Edmundo Larenas 270, Concepción (Chile)
Publication Date:
OSTI Identifier:
22475886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; DOPED MATERIALS; EXCITATION; FOURIER TRANSFORMATION; INFRARED SPECTRA; LUMINESCENCE; OPTICAL PROPERTIES; PEROVSKITE; PHOTOCHEMISTRY; PRASEODYMIUM; SUBSTRATES; SYNTHESIS; THIN FILMS; TITANATES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY