Doped Bi2Te3 nano-structured semiconductors obtained by ultrasonically assisted hydrothermal method

• Authors: Stefan Novaconi , Paulina Vlazan , Iosif Malaescu , Iulia Badea , Ioan Grozescu , Paula Sfirloaga
• Languages of publication: EN

Abstracts

EN

Nanocrystalline powders of doped Bi2Te3, with Ag (S1 sample), Sb (S2 sample), Sn (S3 sample) ions with different morphology and particle size 30–50 nm were prepared by a ultrasonically assisted hydrothermal method in alkaline aqueous solution with different concentration of NaBH4 as reducing agent at 200°C for 3 hours and 80% fill degree of autoclave. The influence of dopants and hydrothermal treatment conditions on the formation features, phase composition, particle size, morphology and properties of the products were investigated by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, atomic force microscopy and electrical measurements. This paper reports a comparative study regarding the dopants influence to the shape and size of nano-structured thermoelectric materials. It was found that hydrothermal processing results in formation of low dimensional dispersion of doped Bi2Te3 nanostructures with desired shape and size and high degree of crystallinity with typical semiconductor behavior. [...]

Keywords

EN

Semiconductors; X-ray diffraction; Atomic force microscopy; Chemical synthesis

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2013
• Volume: 11
• Issue: 10
• Pages: 1599-1605

Dates

published

1 - 10 - 2013

online

19 - 7 - 2013

Contributors

author

Stefan Novaconi

• Condensed Matter Department, National Institute for Research and Development in Electrochemistry and Condensed Matter, 300254, Timisoara, Romania

author

Paulina Vlazan

• Condensed Matter Department, National Institute for Research and Development in Electrochemistry and Condensed Matter, 300254, Timisoara, Romania

author

Iosif Malaescu

• Department of Electricity and Magnetism, Faculty of Physics, West University of Timişoara, Timişoara, Romania

author

Iulia Badea

author

Ioan Grozescu

author

Paula Sfirloaga

• Condensed Matter Department, National Institute for Research and Development in Electrochemistry and Condensed Matter, 300254, Timisoara, Romania

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Identifiers

DOI

10.2478/s11532-013-0291-7