Metalorganic chemical vapor deposition and investigation of nonstoichiometry of undoped BaSnO3 and La-doped BaSnO3 thin films

Murauskas, Tomas; Kubilius, V.; Šaltytė, Z.; Plaušinaitienė, Valentina

doi:10.1016/j.tsf.2019.137575

Cited by 12 publications

(10 citation statements)

References 41 publications

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“…A supreme carrier mobility with the value exceeding 53 cm 2 V –1 s –1 is achieved in the 0.4 M MCC-derived BLSO thin film. Such mobility is an optimal value for solution-derived donor-doped BSO thin films as reported to date − , and is comparable to many La-doped BSO thin films prepared by the vacuum-based method. − Such results further indicate that microstructural engineering through the MCC of the initial precursor solution is an effective route to tune the optical and electrical transport properties of solution-derived BLSO thin films.…”

Section: Resultssupporting

confidence: 58%

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO₃ Transparent Conducting Films

Wei

Zhou

et al. 2021

Crystal Growth & Design

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Epitaxial La-doped BaSnO3 (BLSO) thin films were fabricated on a SrTiO3 (100) substrate by a cost-efficient and scalable solution deposition method. Microstructures and optoelectronic properties of the BLSO thin films can be controlled by the metal cation concentration (MCC) of the initially used precursor solution. It is found that thin films with a denser microstructure, lower resistivity, higher optical transmittance, and good thermal stability can be obtained from the solution with a lower MCC. The growth mechanisms of the initial nucleation are explained in detail for different MCC-derived thin films. Most of all, the highest room-temperature carrier mobility with the value of 53 cm2 V–1 s–1 was achieved among all solution-processed donor-doped BaSnO3 thin films to date. The herein proposed microstructural engineering of the BLSO thin films contributes a sensible and feasible avenue to optimize the optoelectronic performance of transparent conducting thin films by a simple solution approach.

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Section: Resultssupporting

confidence: 58%

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO₃ Transparent Conducting Films

Wei

Zhou

et al. 2021

Crystal Growth & Design

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“…Therefore, sample morphology was investigated using scanning electron microscopy after each annealing. Similar to our previous study [21], MOCVD-produced samples had rough surfaces when sample stoichiometry was shifted to Ba-rich or Sn-rich composition. Comparing all these samples, a similar behavior was observed.…”

Section: Time-dependent Lbso Film Annealing In Vacuumsupporting

confidence: 86%

Structure Modification, Evolution, and Compositional Changes of Highly Conductive La:BaSnO3 Thin Films Annealed in Vacuum and Air Atmosphere

et al. 2022

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Perovskite-type La:BaSnO3 (LBSO) has been drawing considerable attention due to its high electron mobility and optical transparency. Its thin film electrical properties, however, remain inferior to those of single crystals. This work investigates the thermal post-treatment process of films deposited using the metalorganic chemical vapor deposition method to improve the electrical properties of different stoichiometry films, and demonstrates the modification of thin film’s structural properties using short and excessive annealing durations in vacuum conditions. Using vacuum post-treatment, we demonstrate the improvement of electrical properties in Ba-rich, near-stoichiometric, and Sn-rich samples with a maximum electron mobility of 116 cm2V−1s−1 at r.t. However, the improvement of electrical properties causes surface morphology and internal structural changes, which depend on thin film composition. At temperatures of 900 °C–1400 °C the volatile nature of LBSO constituting elements is described, which reveals possible deterioration mechanisms of thin LBSO air. At higher than 1200 °C, LBSO film’s decomposition rate increases exponentially. Thin film structure evolution and previously unreported decomposition is demonstrated by Ba and La diffusion to the substrate, and by evaporation of SnO-SnOx species.

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“…The microstructure, morphology, physicochemical property, specific surface area, and transport property of perovskite oxides are closely related to the synthesis strategy and further influence the electrocatalytic activity. Recently, several approaches have been developed to synthesize perovskite oxides, including conventional synthetic methods (i.e., the solid-state method, combustion synthesis, and high-pressure synthesis) [69,70], wet chemistry methods (i.e., the sol-gel process, co-precipitation method, and hydrothermal synthesis) [71][72][73], deposition approaches (i.e., physical vapor deposition, chemical va-por deposition, and electrodeposition) [74][75][76], electrospinning [77], the polymer-assisted approach [78], and so on.…”

Section: Varied Synthesis Strategymentioning

confidence: 99%

“…The chemical vapor deposition (CVD) method is more versatile in the control of the film composition and has been applied for the growth of various functional oxide materials, including perovskite oxides. For instance, Murauskas et al prepared undoped BaSnO 3 and La-doped BaSnO 3 thin films through low-pressure pulsed injection liquid CVD modification (PI-MOCVD) based on the flash evaporation principle and precise precursor dosing into the reactor, providing easier control of the thin-film composition [75]. Electrodeposition is an electrochemical process that could precisely control the nucleation and growth of reactants as well as the structure, morphology, and purity of the target deposits.…”

Section: Varied Synthesis Strategymentioning

confidence: 99%

Recent Advances in Perovskite Catalysts for Efficient Overall Water Splitting

Zhang

et al. 2022

Catalysts

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Hydrogen is considered a promising clean energy vector with the features of high energy capacity and zero-carbon emission. Water splitting is an environment-friendly and effective route for producing high-purity hydrogen, which contains two important half-cell reactions, namely, the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER). At the heart of water splitting is high-performance electrocatalysts that efficiently improve the rate and selectivity of key chemical reactions. Recently, perovskite oxides have emerged as promising candidates for efficient water splitting electrocatalysts owing to their low cost, high electrochemical stability, and compositional and structural flexibility allowing for the achievement of high intrinsic electrocatalytic activity. In this review, we summarize the present research progress in the design, development, and application of perovskite oxides for electrocatalytic water splitting. The emphasis is on the innovative synthesis strategies and a deeper understanding of structure–activity relationships through a combination of systematic characterization and theoretical research. Finally, the main challenges and prospects for the further development of more efficient electrocatalysts based on perovskite oxides are proposed. It is expected to give guidance for the development of novel non-noble metal catalysts in electrochemical water splitting.

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Metalorganic chemical vapor deposition and investigation of nonstoichiometry of undoped BaSnO3 and La-doped BaSnO3 thin films

Cited by 12 publications

References 41 publications

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO₃ Transparent Conducting Films

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO₃ Transparent Conducting Films

Structure Modification, Evolution, and Compositional Changes of Highly Conductive La:BaSnO3 Thin Films Annealed in Vacuum and Air Atmosphere

Recent Advances in Perovskite Catalysts for Efficient Overall Water Splitting

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Metalorganic chemical vapor deposition and investigation of nonstoichiometry of undoped BaSnO3 and La-doped BaSnO3 thin films

Cited by 12 publications

References 41 publications

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO3 Transparent Conducting Films

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO3 Transparent Conducting Films

Structure Modification, Evolution, and Compositional Changes of Highly Conductive La:BaSnO3 Thin Films Annealed in Vacuum and Air Atmosphere

Recent Advances in Perovskite Catalysts for Efficient Overall Water Splitting

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Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO₃ Transparent Conducting Films

Microstructural Engineering of Solution-Processed Epitaxial La-Doped BaSnO₃ Transparent Conducting Films