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Issue 25, 2011
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Metal complexes with N-methyldiethanolamine as new photosensitive precursors for the low-temperature preparation of ferroelectric thin films

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Abstract

New photosensitive precursors for the low-temperature preparation of ferroelectric PbTiO3 thin films are obtained by using a sol–gel synthetic route. The reaction of N-methyldiethanolamine (MDEA) with lead acetate and titanium bis(acetylacetonate) diisopropoxide reagents leads to the formation of metal-MDEA complexes with a significant ultraviolet (UV) absorption due to the chromophore groups arisen from the orbital splitting between the respective metal atom and the organic ligand. Processes of transference of charge between the nitrogen and the metallic centre are responsible for the UV absorption in the resulting sols: ligand to metal charge transfer (LMCT) in the case of the Ti(IV) complex, d0 element, and metal to ligand charge transfer (MLCT) in the case of the Pb(II) one, d10 element. The enhanced photosensitivity of the precursor solutions provided by these complexes is exploited for the fabrication of ferroelectric PbTiO3 films at temperatures compatible with silicon microelectronics (400 °C).

Graphical abstract: Metal complexes with N-methyldiethanolamine as new photosensitive precursors for the low-temperature preparation of ferroelectric thin films

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Article information


Submitted
25 Feb 2011
Accepted
28 Mar 2011
First published
18 May 2011

J. Mater. Chem., 2011,21, 9051-9059
Article type
Paper

Metal complexes with N-methyldiethanolamine as new photosensitive precursors for the low-temperature preparation of ferroelectric thin films

N. Martín-Arbella, I. Bretos, R. Jiménez, M. L. Calzada and R. Sirera, J. Mater. Chem., 2011, 21, 9051
DOI: 10.1039/C1JM10846H

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