Perovskite-Structured PbTiO₃ Thin Films Grown from a Single-Source Precursor

Abstract

Perovskite-structured lead titanate thin films have been grown on FTO-coated glass substrates from a single-source heterometallic molecular complex, [PbTi(μ2-O2CCF3)4(THF)3(μ3-O)]2 (1), which was isolated in quantitative yield from the reaction of tetraacetatolead(IV), tetrabutoxytitanium(IV), and trifluoroacetic acid from a tetrahydrofuran solution. Complex 1 has been characterized by physicochemical methods such as melting point, microanalysis, FTIR, (1)H and (19)F NMR, thermal analysis, and single-crystal X-ray diffraction (XRD) analysis. Thin films of lead titanate having spherical particles of various sizes have been grown from 1 by aerosol-assisted chemical vapor deposition at 550 °C. The thin films have been characterized by powder XRD, scanning electron microscopy, and energy-dispersive X-ray analysis. An optical band gap of 3.69 eV has been estimated by UV-visible spectrophotometry.

Dye sensitized solar cell applications of CdTiO3–TiO2 composite thin films deposited from single molecular complex

“…In continuation of earlier work on house designed AACVD assembly [29][30][31][32][33][34][35], CdTiO 3 -TiO 2 composite thin films were deposited on commercially available FTO conducting glass substrate. Before carrying out the deposition, substrates were cleaned with distilled water, acetone and ethyl alcohol, then placed inside the reactor tube and furnace (CARBOLITE, Model No.…”

“…This strategy of maneuvering materials from molecules is significant for obtaining mixed-metal ceramics and composites. Therefore, in recent years [29][30][31][32][33][34][35], we were particularly involved in targeting titanium based heterometallic complexes as potential SSPs for crystalline multimetallic oxides. For the construction of these complexes, we demonstrated the possibility of utilizing Lewis acid-base interactions with fluorinated and functionalized alcoholic species being used more frequently because of their bridging coordination and enhanced volatility capabilities [29][30][31][32][33][34][35].…”

“…Therefore, in recent years [29][30][31][32][33][34][35], we were particularly involved in targeting titanium based heterometallic complexes as potential SSPs for crystalline multimetallic oxides. For the construction of these complexes, we demonstrated the possibility of utilizing Lewis acid-base interactions with fluorinated and functionalized alcoholic species being used more frequently because of their bridging coordination and enhanced volatility capabilities [29][30][31][32][33][34][35]. These compounds exhibit high volatility, clean, low-temperature decomposition, and retention of heterometallic structures upon sublimation-deposition as well as in solutions of non-coordinating solvents [29][30][31][32][33][34][35].…”

The synthesis and characterization of a hexanuclear copper–yttrium complex for deposition of semiconducting CuYO2–0.5Cu2O composite thin films

“…The residual paste was dissolved in 5 mL of toluene and extracted from unreacted copper (II) methoxide by cannula filtration. At this stage 0.10 g Y(OAc) 3 .xH 2 O suspended in 25 mL of toluene was added drop wise with vigorous stirring that continued for 5 h. Filtration through cannula gave a clear light blue solution which was evaporated to dryness under vacuum. The solid was washed three times with 5 mL dry n-hexane and re-dissolved in 3 mL of dry toluene to harvest the first crop of light blue crystals after 5 days at -10 o C. Yield 58%, m.p.…”

“…Complexes containing alkoxide and acetato ligands are of particular interest, partly due to their potential utility as molecular models for superconductors and in fabrication of thin films at low temperatures of 400-500 o C by using chemical vapour deposition (CVD). [3][4][5][6] Multifunctional ligands such as alkoxido, acetato, fluoroacetato and β-diketonato coordinatively saturate each metal atom and restrict its ability to oligomerize at the same time enhancing its solubility in organic solvents and making it useful as a precursor to fabricate bimetallic composite oxide thin films. 7 Extensive work has been done on the development of heterometallic complexes of copper with yttrium and barium such as [Y 2 Cu 8 (µ-PyO) 12 (µ-Cl) 2 4 (MeOH) 2 ] 2 MeOH), 11 [BaCu 4 (PyO) 4 (bdmap) 4 …”