Elaboration of Bi2Te3 by metal organic chemical vapor deposition

Optical properties of thermally evaporated Bi2Te3 thin films

“…The film density is therefore expected to change in accordance with the change of lattice constant [15,16]. The matching of d values indicates that the structure is hexagonal polycrystalline nature of the substance [17][18][19]. The grain size of the films was calculated from the XRD using Scherer's relation [20],…”

“…They, in the form of thin films, have already been elaborated by flash evaporation [4], hot wall epitaxy [5], sputtering [3], metal oxide chemical vapor deposition [6] and molecular beam epitaxy [7]. Kaddouri et al [8] have studied optical properties of bismuth telluride thin films grown by hotwall epitaxy on Si (1 0 0) and SiO 2 substrates.…”

Electrochemical deposition of Bi2Te3-based thin films

“…5 structure. Morphology and crystal orientation of the films were dependent on the deposition potentials.…”

“…They are traditionally synthesized by powder metallurgy [3] and zone melting processes [4] in bulk forms. Requirements of miniaturization for TE devices stimulate the research on fabricating Bi 2 Te 3 -based thin films by sputtering and evaporation methods [5][6]. However, those techniques are expensive and not readily to produce large-area TE materials.…”

Pulsed Electroplating: a Derivate Form of Electrodeposition for Improvement of (Bi1−x Sb x )2Te3 Thin Films

“…Bismuth telluride and its derivatives are the most important semiconductor thermoelectric materials used in the fabrication of devices for the 200 K to 400 K temperature range, 1 in particular Bi 2 Te 2.7 -Se 0.3 and Bi 0.5 Sb 1.5 Te 3 as n-and p-type materials, respectively. A large number of techniques can be used to synthesize these compounds: single-crystal growth, 2 sintering, 3 vacuum arc-plasma evaporation, 4 metal organic chemical vapor deposition (MOCVD), 5,6 etc. Electrochemical deposition (ECD) also opens up opportunities for thin-film microsystems, since this method is considerably simpler and cheaper than other techniques.…”