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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21538

Title: Gaining new insight into low-temperature aqueous photochemical solution deposited ferroelectric PbTiO3 films
Authors: De Dobbelaere, Christopher
Lourdes Calzada, M.
Bretos, Inigo
Jimenez, Ricardo
Ricote, Jesus
Hadermann, Joke
Hardy, An
Van Bael, Marlies K.
Issue Date: 2016
Publisher: ELSEVIER SCIENCE SA
Citation: MATERIALS CHEMISTRY AND PHYSICS, 174, p. 28-40
Abstract: The nature of the low-temperature photochemical assisted formation process of ferroelectric lead titanate (PbTiO3) films is studied in the present work. Films are obtained by the deposition of an aqueous solution containing citric acid based (citrato) metal ion complexes with intrinsic UV activity. This UV activity is crucial for the aqueous photochemical solution deposition (aqueous PCSD) route being used. UV irradiation enhances the early decomposition of organics and results in improved electrical properties for the crystalline oxide film, even if the film is crystallized at low temperature. GATR-FTIR shows that UV irradiation promotes the decomposition of organic precursor components, resulting in homogeneous films if applied in the right temperature window during film processing. The organic content, morphology and crystallinity of the irradiated films, achieved at different processing atmospheres and temperatures, is studied and eventually correlated to the functional behavior of the obtained films. This is an important issue, as crystalline films obtained at low temperatures often lack ferroelectric responses. In this work, the film prepared in pure oxygen at the very low temperature of 400 degrees C and after an optimized UV treatment presents a significant remanent polarization value of P-r = 8.8 mu C cm(-2). This value is attributed to the better crystallinity, the larger grain size and the reduced porosity obtained thanks to the early film crystallization effectively achieved through the UV treatment in oxygen. (C) 2016 Elsevier B.V. All rights reserved.
Notes: [De Dobbelaere, Christopher; Hardy, An; Van Bael, Marlies K.] Hasselt Univ, Inst Mat Res Inorgan & Phys Chem, B-3500 Hasselt, Belgium. [Lourdes Calzada, M.; Bretos, Inigo; Jimenez, Ricardo; Ricote, Jesus] Inst Ciencia Mat Madrid ICMM CSIC, E-28049 Madrid, Spain. [Hadermann, Joke] Univ Antwerp, Dept Phys, EMAT, B-2020 Antwerp, Belgium. [Hardy, An; Van Bael, Marlies K.] IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/21538
DOI: 10.1016/j.matchemphys.2016.02.047
ISI #: 000373865700005
ISSN: 0254-0584
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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