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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2502

Title: Ferroelectric SrBi2Nb2O9 thin films by aqueous chemical solution deposition
Authors: NELIS, Daniel
VAN BAEL, Marlies
VAN DEN RUL, Heidi
MULLENS, Jules
VAN POUCKE, Lucien
VANHOYLAND, Geert
D'HAEN, Jan
Laureyn, W
Wouters, DJ
Issue Date: 2002
Publisher: TAYLOR & FRANCIS LTD
Citation: INTEGRATED FERROELECTRICS, 45. p. 205-213
Abstract: SrBi2Nb2O9 (SBN) thin films on a Pt/Ti/SiO2/Si substrate were prepared by aqueous chemical solution deposition. The precursor solution was synthesized by means of an 'aqueous solution-gel method', starting with stable, inexpensive and easily available inorganic salts which are dissolved in an aqueous solution of chelating or coordinating ligands (acetates and citrates). Afterwards the synthesized precursor was spin-coated. However, problems arose as a consequence of insufficient 'wetting' of the substrate surface by the aqueous solution (poor film-substrate adhesion). Instead of improving surface adhesion by the addition of a surface-wetting reagent, a new strategy was developed: prior to spin-coating the platinum surface characteristics were modified using a UV/ozone technique. In this way the precursor solution was not chemically changed. Wetting/wettability was verified by means of contact angle measurements. A uniform, three-layer thin film with a total thickness of about 200 nm was obtained after thermal treatment, as could be verified using SEM and XRD.
Notes: Limburgs Univ Ctr, IMO, Lab Inorgan & Phys Chem, B-3590 Diepenbeek, Belgium. Limburgs Univ Ctr, IMO, Phys Anal Grp, B-3590 Diepenbeek, Belgium. Limburgs Univ Ctr, IMO, IMOMEC, B-3590 Diepenbeek, Belgium. IMEC, B-3001 Heverlee, Belgium.Nelis, D, Limburgs Univ Ctr, IMO, Lab Inorgan & Phys Chem, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/2502
ISI #: 000179828300026
ISSN: 1058-4587
Category: A1
Type: Journal Contribution
Validation: ecoom, 2004
Appears in Collections: Research publications

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