Optimization of chemical and electrochemical parameters for the preparation of n-type Bi2Te2.7Se0.3 thin films by electrodeposition

Michel, S.; Stein, N.; Schneider, M.; Boulanger, C.; Lecuire, J.-M.
January 2003
Journal of Applied Electrochemistry;Jan2003, Vol. 33 Issue 1, p23
Academic Journal
A 23-1 fractional factorial design comprising four runs and three centre points was applied in order to optimize the electrodeposition process to find a compound with the best stoichiometry leading to a Bi2Te2.7Se0.3 thin film suitable for thermoelectric applications. The key factors considered were the deposition potential, the percentage of bismuth and the percentage of selenium in the solution. The BiIII, SeIV, TeIV electrolyte mixtures in 1 M HNO3 (pH 0), allowed deposition of ternary alloys to be achieved at room temperature on stainless steel substrates. The deposition mechanism was investigated by linear voltammetry. The films were characterized by micropobe analysis, X-ray diffraction, scanning electron microscopy and atomic force microscopy. The XRD patterns of the film show that the as-deposited are polycrystalline and isostructural to Bi2Te3. The SEM study shows that the film is covered by crystallites while the AFM image reveals a low level of roughness.


Related Articles

  • Determination of selenium(IV) by cathodic stripping voltammetry using a copper-modified mercury-film electrode modified with copper. Zaitsev, N.; Osipova, E.; Fedulov, D.; Eremenko, E.; Dedov, A. // Journal of Analytical Chemistry;Jan2006, Vol. 61 Issue 1, p77 

    The behavior of selenium(IV) at a mercury-film electrode previously modified with copper was studied by cathodic stripping voltammetry using an automatic system for replacing solutions without opening the circuit. The effect of chemical (the composition and concentration of the supporting...

  • Reduction in crystallization time of Sb:Te films through addition of Bi. Simpson, R. E.; Hewak, D. W.; Fons, P.; Tominaga, J.; Guerin, S.; Hayden, B. E. // Applied Physics Letters;4/7/2008, Vol. 92 Issue 14, p141921 

    The electrical, optical, and phase change properties of bismuth doped Sb8Te2 films have been characterized. Thin films of the material, with up to 15 at. % percent Bi, have been synthesized; amorphous films were stable at room temperature with a Bi concentration of up to 13 at. %. The effect of...

  • Structural and electrical properties of epitaxial Bi2Se3 thin films grown by hybrid physical-chemical vapor deposition. Brom, Joseph E.; Ke, Yue; Du, Renzhong; Won, Dongjin; Weng, Xiaojun; Andre, Kalissa; Gagnon, Jarod C.; Mohney, Suzanne E.; Li, Qi; Chen, Ke; Xi, X. X.; Redwing, Joan M. // Applied Physics Letters;4/16/2012, Vol. 100 Issue 16, p162110 

    We report the epitaxial growth of Bi2Se3 thin films on (0001) Al2O3 substrates by hybrid physical-chemical vapor deposition (HPCVD). The HPCVD technique combines the thermal decomposition of trimethylbismuth with the thermal evaporation of Se and leads to a high Se partial pressure in the growth...

  • Voltammetric determination of selenosulfate ions at a mercury-film electrode. Kovaleva, S.; Gladyshev, V.; Rubinskaya, T. // Journal of Analytical Chemistry;Jan2006, Vol. 61 Issue 1, p72 

    A procedure is proposed for the voltammetric determination of selenium as selenosulfate (SO3Se2−) ions at a mercury-film electrode (MFE). Selenosulfate ions are determined in the range from 2 × 10−4 to 1.0 × 10−3 M without analyte accumulation, using peak current at...

  • On-Line Determination of Lead in Tap Waters at Two-Step Prepared Bismuth Electrode. Dawei Pan; Li Zhang; Jianmei Zhuang; Tanji Yin; Wenjing Lu; Wei Qin // International Journal of Electrochemical Science;Jul2011, Vol. 6, p2710 

    An anodic stripping analysis system based on two-step prepared bismuth electrode for on-line determination of lead (Pb2+) in tap water samples is presented here. Such two-step prepared electrode modified in-situ and ex-situ bismuth film shows remarkably improved sensitivity to Pb2+ in acidic...

  • Cu2ZnSnSe4 thin film solar cells above 5% conversion efficiency from electrodeposited Cu Sn Zn precursors. Vauche, Laura; Dubois, Jérôme; Laparre, Aurélie; Mollica, Fabien; Bodeux, Romain; Delbos, Sébastien; Ruiz, Carmen M.; Pasquinelli, Marcel; Bahi, Farid; de Monsabert, Thomas Goislard; Jaime, Salvador; Bodnar, Sylvie; Grand, Pierre‐Philippe // Physica Status Solidi. A: Applications & Materials Science;Sep2014, Vol. 211 Issue 9, p2082 

    Cu2ZnSnSe4 solar cells were synthesized by electrodeposition of metal stack precursors followed by selenization, a high potential process for industry, leading to conversion efficiencies above 5%. An additional selenium-capping layer deposited on the precursor before annealing showed improved...

  • Electrochemical Deposition of Gold in Citrate olution Containing Thallium. Gojo, Miroslav; Stanković, Velizar D.; Poljaček, Sanja Mahović // Acta Chimica Slovenica;2008, Vol. 55 Issue 2, p330 

    Electrochemical deposition of gold from citrate solution, with and without thallium, has been studied using a rotating disc electrode (RDE) and linear sweep voltammetry. RDE was made from a mono-crystal silicon wafer, coated with a thin film of gold, deposited by a vapor deposition process...

  • Electrochemical oxidation process for water condensates recycling in a shuttle orbiter. Rutigliano, L.; Fino, D.; Saracco, G.; Specchia, V.; Spinelli, P.; Grizzaffi, L. // Journal of Applied Electrochemistry;Nov2009, Vol. 39 Issue 11, p2239 

    A pilot plant has been built for the regeneration of humidity condensates during shuttle missions. The plant is an automated experimental apparatus which includes an electrochemical cell, two reservoirs and a control system to maintain the temperature within a chosen range, so that the ionic...

  • Epitaxial growth of Bi2Se3 topological insulator thin films on Si (111). He, Liang; Xiu, Faxian; Wang, Yong; Fedorov, Alexei V.; Huang, Guan; Kou, Xufeng; Lang, Murong; Beyermann, Ward P.; Zou, Jin; Wang, Kang L. // Journal of Applied Physics;May2011, Vol. 109 Issue 10, p103702 

    In this paper, we report the epitaxial growth of Bi2Se3 thin films on Si (111) substrate, using molecular beam epitaxy (MBE). We show that the as-grown samples have good crystalline quality, and their surfaces exhibit terracelike quintuple layers. Angel-resolved photoemission experiments...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics