Chemical vapour deposition of antimony chalcogenides with positional and orientational control: precursor design and substrate selectivity

Benjamin, Sophie L.; Groot, C. H. de; Hector, Andrew L.; Huang, Ruomeng; Koukharenko, Elena; Levason, William; Reid, Gillian

doi:10.1039/c4tc02327g

Cited by 51 publications

(50 citation statements)

References 42 publications

(48 reference statements)

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“…(MO)CVD growth of single‐crystals platelets with partially controlled dimensions and orientation in arrays was reported in refs. . Here it is shown that the same level of crystal quality is reproduced on a pillar, rather than platelets geometry, and in a density that exceeds by orders of magnitude those reported in the above‐mentioned references.…”

Section: Resultssupporting

confidence: 68%

High‐Density Sb₂Te₃ Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

Cecchini

Gajjela

Martella

et al. 2019

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Sb2Te3 exhibits several technologically relevant properties, such as high thermoelectric efficiency, topological insulator character, and phase change memory behavior. Improved performances are observed and novel effects are predicted for this and other chalcogenide alloys when synthetized in the form of high‐aspect‐ratio nanostructures. The ability to grow chalcogenide nanowires and nanopillars (NPs) with high crystal quality in a controlled fashion, in terms of their size and position, can boost the realization of novel thermoelectric, spintronic, and memory devices. Here, it is shown that highly dense arrays of ultrascaled Sb2Te3 NPs can be grown by metal organic chemical vapor deposition (MOCVD) on patterned substrates. In particular, crystalline Sb2Te3 NPs with a diameter of 20 nm and a height of 200 nm are obtained in Au‐functionalized, anodized aluminum oxide (AAO) templates with a pore density of ≈5 × 1010 cm−2. Also, MOCVD growth of Sb2Te3 can be followed either by mechanical polishing and chemical etching to produce Sb2Te3 NPs arrays with planar surfaces or by chemical dissolution of the AAO templates to obtain freestanding Sb2Te3 NPs forests. The illustrated growth method can be further scaled to smaller pore sizes and employed for other MOCVD‐grown chalcogenide alloys and patterned substrates.

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Section: Resultssupporting

confidence: 68%

High‐Density Sb₂Te₃ Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

Cecchini

Gajjela

Martella

et al. 2019

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“…Energy dispersive X-ray spectroscopy (EDX) spectra also show the presence of Sb and Se peaks ( Fig S2a), and the Raman spectrum indicates a pure Sb 2 Se 3 phase ( Fig S2b). (11) In order to evaluate if Sb 2 Se 3 could be employed as a photocathode for hydrogen evolution, the band positions of the Sb 2 Se 3 were determined using Mott-Schottky (M-S) analysis. To circumvent frequency dispersion in the M-S plots, the space charge capacitance (C SC ) was determined by electrochemical impedance spectroscopy (EIS).…”

Section: Main Textmentioning

confidence: 99%

Photocorrosion-resistant Sb₂Se₃photocathodes with earth abundant MoS_xhydrogen evolution catalyst

Prabhakar

Septina

Siol³

et al. 2017

J. Mater. Chem. A

100

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“…40 Sb 2 Se 3 was also synthesized by alkylselenostibines and selenourea complexes. 41,42 However selenostilbines require toxic metal alkyl compounds for their synthesis, phosphorus based complexes may lead either to phosphorus contamination or formation of an entirely different phosphate product. 24 Similarly, diselenocarbamate precursors has been used for metal selenide thin films but the synthesis requires the use of highly toxic carbon diselenide (CSe 2 ).…”

Section: Introductionmentioning

confidence: 99%

Novel single source precursor for synthesis of Sb2Se3 nanorods and deposition of thin films by AACVD: Photo-electrochemical study for water reduction catalysis

et al. 2018

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N. (2018). Novel single source precursor for synthesis of Sb2Se3 nanorods and deposition of thin films by AACVD: Photo-electrochemical study for water reduction catalysis. Solar Energy, 169, 526-534. https://doi. AbstractA new complex, tris(selenobenzoato)antimony(III) has been synthesized by a facile route and the structure determined by single crystal X-ray crystallography. The complex was used as a single source precursor to synthesize Sb 2 Se 3 nanorods by the hot injection method whereas Sb 2 Se 3 thin films were deposited on glass substrates by the Aerosol Assisted Chemical Vapour Deposition (AACVD) technique. The as synthesized nanorods and thin films were then characterized by powder x-ray diffraction, electron microscopy, Raman and UV/Vis spectroscopy. AACVD of the complex produced highly crystalline and pure Sb 2 Se 3 thin films between 400-500 °C. The shape of Sb 2 Se 3 crystallites are generally in the form of wires or thin plates, sometimes forming leaflike structures uniformly spread on the entire substrate. The size and shape of these crystallites with their stoichiometry was found to be dependent on the deposition temperature. Sb 2 Se 3 nanorods were tested for photo-electrochemical (PEC) water reduction catalysis. When simulated solar light was illuminated at the Sb 2 Se 3 /FTO surface, cathodic photocurrents were generated for H 2 generation. At open circuit potential (OCP) photo-cathodic current generated with the Sb 2 Se 3 /FTO electrode was in the range of -44.8 to -52.1 μA.cm -2 .

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Chemical vapour deposition of antimony chalcogenides with positional and orientational control: precursor design and substrate selectivity

Abstract: A series of alkylchalcogenostibines have been synthesised and employed as precursors for the chemical vapour deposition of Sb2Te3 and Sb2Se3. Variations in substrate and temperature give different film morphologies, and patterned arrays can be deposited using substrate selectivity.

Cited by 51 publications

References 42 publications

High‐Density Sb₂Te₃ Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

High‐Density Sb₂Te₃ Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

Photocorrosion-resistant Sb₂Se₃photocathodes with earth abundant MoS_xhydrogen evolution catalyst

Novel single source precursor for synthesis of Sb2Se3 nanorods and deposition of thin films by AACVD: Photo-electrochemical study for water reduction catalysis

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Chemical vapour deposition of antimony chalcogenides with positional and orientational control: precursor design and substrate selectivity

Abstract: A series of alkylchalcogenostibines have been synthesised and employed as precursors for the chemical vapour deposition of Sb2Te3 and Sb2Se3. Variations in substrate and temperature give different film morphologies, and patterned arrays can be deposited using substrate selectivity.

Cited by 51 publications

References 42 publications

High‐Density Sb2Te3 Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

High‐Density Sb2Te3 Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

Photocorrosion-resistant Sb2Se3photocathodes with earth abundant MoSxhydrogen evolution catalyst

Novel single source precursor for synthesis of Sb2Se3 nanorods and deposition of thin films by AACVD: Photo-electrochemical study for water reduction catalysis

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High‐Density Sb₂Te₃ Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

High‐Density Sb₂Te₃ Nanopillars Arrays by Templated, Bottom‐Up MOCVD Growth

Photocorrosion-resistant Sb₂Se₃photocathodes with earth abundant MoS_xhydrogen evolution catalyst