Synthesis and crystal structure of cobalt(II) Schiff base precursor for cobalt oxide thin film by thermal chemical vapor deposition

Sravanthi, P.; Chandrakala, C.; Bharath, S.; Johnson, Manoj; Arokiasamy, S.; Nagaraja, K.S.; Jeyaraj, B.

doi:10.1016/j.poly.2015.12.033

Cited by 13 publications

(2 citation statements)

References 34 publications

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“…To the best of our knowledge, only two reports of cobalt precursors for CVD, bearing mixed O/N coordinated ligands, were published, namely, [Co(saliprn) 2 ] (saliprn = N -isopropylsalicylaldimine) and [Co(PyCHCOCF 3 ) 3 ] (Py = pyridine). While the former precursor was employed in an MOCVD process at atmospheric pressure and 550 °C evaporation temperature, the latter required an evaporation temperature of 150 °C at 1 × 10 –3 mbar. , Furthermore, the heteroleptic, dimeric compound [Co 2 (dmamp) 2 (acac) 2 ] (dmamp = 1-dimethylamino-2-methyl-2-propoxide) and its derivates were recently proposed as potential precursors for vapor-phase depositions by Chung et al This class of complexes however has despite their promising thermal properties not been employed in a deposition process yet.…”

Section: Introductionmentioning

confidence: 99%

Rational Development of Cobalt β-Ketoiminate Complexes: Alternative Precursors for Vapor-Phase Deposition of Spinel Cobalt Oxide Photoelectrodes

et al. 2018

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A series of six cobalt ketoiminates, of which one was previously reported but not explored as a chemical vapor deposition (CVD) precursor, namely, bis(4-(isopropylamino)pent-3-en-2-onato)cobalt(II) ([Co( pki)], 1), bis(4-(2-methoxyethylamino)pent-3-en-2-onato)cobalt(II) ([Co(meki)], 2), bis(4-(2-ethoxyethylamino)pent-3-en-2-onato)cobalt(II) ([Co(eeki)], 3), bis(4-(3-methoxy-propylamino)pent-3-en-2-onato)cobalt(II) ([Co(mpki)], 4), bis(4-(3-ethoxypropylamino)pent-3-en-2-onato)cobalt(II) ([Co(epki)], 5), and bis(4-(3-isopropoxypropylamino)pent-3-en-2-onato)cobalt(II) ([Co( ppki)], 6) were synthesized and thoroughly characterized. Single-crystal X-ray diffraction (XRD) studies on compounds 1-3 revealed a monomeric structure with distorted tetrahedral coordination geometry. Owing to the promising thermal properties, metalorganic CVD of CoO was performed using compound 1 as a representative example. The thin films deposited on Si(100) consisted of the spinel-phase CoO evidenced by XRD, Rutherford backscattering spectrometry/nuclear reaction analysis, and X-ray photoelectron spectroscopy. Photoelectrochemical water-splitting capabilities of spinel CoO films grown on fluorine-doped tin oxide (FTO) and TiO-coated FTO revealed that the films show p-type behavior with conduction band edge being estimated to -0.9 V versus reversible hydrogen electrode. With a thin TiO underlayer, the CoO films exhibit photocurrents related to proton reduction under visible light.

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Section: Introductionmentioning

confidence: 99%

Rational Development of Cobalt β-Ketoiminate Complexes: Alternative Precursors for Vapor-Phase Deposition of Spinel Cobalt Oxide Photoelectrodes

et al. 2018

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“…It is worth recalling that the same O-free protocol previously applied along with the sublimation of the humidified (Co 2 (CO) 8 + 1-10% hexane) precursor led to the formation of CoO [2]. From these former sublimation experiments, the atomic compositions of the films were all close to Co(44)O(44)C (12), in the form of stoichiometric CoO with C contamination. The only consistent supply of oxygen came from the decomposition of the precursor carbonyls (CO → -C ads + O ads ), hence if one tries to balance the post mortem stoichiometry (Co(44)O(44)C(12)) with elements coming from carbonyls (1 C ads for 1 O ads ), the C ads content is too low.…”

Section: The Dli-mocvd Processmentioning

confidence: 73%

Black Co oxides coatings for thermosensitive polymer surfaces by low-temperature DLI-MOCVD

Duguet

Amin-Chalhoub

Samélor

et al. 2018

Surface and Coatings Technology

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. Black coatings are deposited at low temperature in order to enable the functionalization of thermosensitive substrates, such as epoxy-based carbon fiber reinforced polymers (CFRP). The direct liquid injection metalorganic chemical vapor deposition of Co oxide films is performed with the dicobalt octacarbonyl precursor, Co 2 (CO) 8 , in the temperature range 50°C-160°C, on Si substrates, first. Films morphology can be described by a dense sublayer on which the typical "cauliflower" microstructure grows, with a large amount of voids and open porosity. We obtain nanocrystalline CoO in the deposition temperature range 50°C-125°C, and nanocrystalline (CoO + Co 3 O 4 ) above 125°C. The bulk composition of the films is Co (45)O (45)C(10). Over the deposition temperatures tested, films processed at 125°C repetitively show the lowest reflectivity in the visible range. An important role in the optical reflectivity is attributed to the carbon content, although it is not possible to decorrelate microstructural changes from the carbon elimination in calcination experiments. Finally, we reproduce the above-mentioned results with success on CFRP substrates, and demonstrate the applicability of the process on thermosensitive composite parts with results comparable to the state-of-the-art in the visible range.

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Improvement of structural, optical and magnetic properties of cobalt oxide thin films by doping with iron

et al. 2021

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Synthesis and crystal structure of cobalt(II) Schiff base precursor for cobalt oxide thin film by thermal chemical vapor deposition

Cited by 13 publications

References 34 publications

Rational Development of Cobalt β-Ketoiminate Complexes: Alternative Precursors for Vapor-Phase Deposition of Spinel Cobalt Oxide Photoelectrodes

Rational Development of Cobalt β-Ketoiminate Complexes: Alternative Precursors for Vapor-Phase Deposition of Spinel Cobalt Oxide Photoelectrodes

Black Co oxides coatings for thermosensitive polymer surfaces by low-temperature DLI-MOCVD

Improvement of structural, optical and magnetic properties of cobalt oxide thin films by doping with iron

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