Growth of beta barium borate (β-BaB2O4) thin films by injection metal organic chemical vapour deposition

Wersand-Quell, Sandra; Orsal, G.; Thévenin, Philippe; Bath, A.

doi:10.1016/j.tsf.2006.11.181

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…For example, neutral ancillary ligands, such as glymes, can be used to help fill the coordination sphere if the anionic ligands themselves are not sufficiently saturating . The majority of barium complexes that have been explored as thin-film precursors are diketonates or ketoiminates, − and often these ligands have been functionalized with flexible donor pendants that can occupy additional coordination sites around the metal. ,− Other barium precursors that have been used for thin-film growth include those that utilize alkoxide cyclopentadienyl, − and (pyrazolyl)borate ligands. − …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Structural Diversity of Barium (N,N-Dimethylamino)diboranates

et al. 2012

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The reaction of a slurry of BaBr(2) in a minimal amount of tetrahydrofuran (THF) with 2 equiv of Na(H(3)BNMe(2)BH(3)) in diethyl ether followed by crystallization from diethyl ether at -20 °C yields crystals of Ba(H(3)BNMe(2)BH(3))(2)(Et(2)O)(2) (1). Drying 1 at room temperature under vacuum gives the partially desolvated analogue Ba(H(3)BNMe(2)BH(3))(2)(Et(2)O)(x) (1') as a free-flowing white solid, where the value of x varies from <0.1 to about 0.4 depending on whether desolvation is carried out with or without heating. The reaction of 1 or 1' with Lewis bases that bind more strongly to barium than diethyl ether results in the formation of new complexes Ba(H(3)BNMe(2)BH(3))(2)(L), where L = 1,2-dimethoxyethane (2), N,N,N',N'-tetramethylethylenediamine (3), 12-crown-4 (4), 18-crown-6 (5), N,N,N',N'-tetraethylethylenediamine (6), and N,N,N',N",N"-pentamethylethylenetriamine (7). Recrystallization of 4 and 5 from THF affords the related compounds Ba(H(3)BNMe(2)BH(3))(2)(12-crown-4)(THF)·THF (4') and Ba(H(3)BNMe(2)BH(3))(2)(18-crown-6)·2THF (5'). In addition, the reaction of BaBr(2) with 2 equiv of Na(H(3)BNMe(2)BH(3)) in the presence of diglyme yields Ba(H(3)BNMe(2)BH(3))(2)(diglyme)(2) (8), and the reaction of 1 with 15-crown-5 affords the diadduct [Ba(15-crown-5)(2)][H(3)BNMe(2)BH(3)](2) (9). Finally, the reaction of BaBr(2) with Na(H(3)BNMe(2)BH(3)) in THF, followed by the addition of 12-crown-4, affords the unusual salt [Na(12-crown-4)(2)][Ba(H(3)BNMe(2)BH(3))(3)(THF)(2)] (10). All of these complexes have been characterized by IR and (1)H and (11)B NMR spectroscopy, and the structures of compounds 1-3, 4', 5', and 6-10 have been determined by single-crystal X-ray diffraction. As the steric demand of the Lewis bases increases, the structure changes from polymers to dimers to monomers and then to charge-separated species. Despite the fact that several of the barium complexes are monomeric in the solid state, none is appreciably volatile up to 200 °C at 10(-2) Torr.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Structural Diversity of Barium (N,N-Dimethylamino)diboranates

et al. 2012

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“…[29][30][31][32][33][34][35][36] There are several reports of group 2 metal borate thin film depositions by chemical vapor deposition (CVD). [37][38][39][40] Marks and coworkers grew crystalline b-barium borate films by CVD using direct liquid injection of Ba(thd) 2 (tetraglyme) (thd ¼ 2,2,6, 6-tetramethylheptanedionate) and B(O i Pr) 3 solutions, with oxygen and nitrous oxide as the oxidizer gases. 37 These films were deposited between 640 and 840 C, and a Ba : B precursor stoichiometry of 1 : 2.5 was required to achieve stoichiometric BaB 2 O 4 films.…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of CaB2O4 films using bis(tris(pyrazolyl)borate)calcium as a highly thermally stable boron and calcium source

2010

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“…On the other hand, in the case of heat-treatment for 7 days in the presence of borosilicate glass, the BSCF diffraction peaks disappear completely, and there are formations of many new small peaks (Fig. 37 The B1s peak at 190.2 eV is most likely originates from borates. The new peaks are originated from a number of compounds such as BaFeO 2.25 , BaFeO 2.64 , BaFeO 3 , BaCO 3 , Ba 3 Co 2 Fe 24 O 41 and Sr 3 FeO 6.69 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Volatile Boron Species on the Electrocatalytic Activity of Cathodes of Solid Oxide Fuel Cells

Chen

Hyodo

O’Donnell

et al. 2014

J. Electrochem. Soc.

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The effect of volatile boron species on the electrocatalytic activity, microstructure and phase stability of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) cathodes has been studied. The cathodes were heat-treated at 800 • C for 7 days in air in the presence of boron species vaporized from borosilicate glass, and were characterized by EIS, SEM, AFM, SIMS, XRD, XPS and ICP-OES. The results have shown that after the heat-treatment in the presence of borosilicate glass, boron deposition occurs mainly on the region near electrode surface, leading to the significant Ba and in particular Sr segregation, microstructure change and phase decomposition. On the other hand, the microstructure of the inner electrode layer is almost intact. Electrode polarization resistance, R E , of an as-prepared BSCF cathode is 0.93 and 0.23 cm 2 at 650 and 800 • C, respectively, and changes to 2.08 and 0.15 cm 2 after heat-treatment at 800 • C for 7 days in the presence of borosilicate glass, respectively. The increase in R E for the O 2 reduction reaction on BSCF is much lower than that observed on La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathodes, indicating that BSCF cathodes have a much better tolerance toward boron deposition and poisoning. The limited attack of volatile boron species on BSCF is most likely related to the much slower kinetics of the formation of strontium and barium borates as compared to the formation of lanthanum borates. This study provides a significant insight into design and development of better contaminant-tolerant cathode materials for durable solid oxide fuel cell (SOFC) technologies.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2014-12-11 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2014-12-11 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2014-12-11 to IP

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Growth of beta barium borate (β-BaB2O4) thin films by injection metal organic chemical vapour deposition

Cited by 14 publications

References 19 publications

Synthesis and Structural Diversity of Barium (N,N-Dimethylamino)diboranates

Synthesis and Structural Diversity of Barium (N,N-Dimethylamino)diboranates

Atomic layer deposition of CaB2O4 films using bis(tris(pyrazolyl)borate)calcium as a highly thermally stable boron and calcium source

Effect of Volatile Boron Species on the Electrocatalytic Activity of Cathodes of Solid Oxide Fuel Cells

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