Thermochemical and kinetic aspects of the sulfurization of Cu-Sb and Cu-Bi thin films


Colombara, D., Peter, L. M., Rogers, K. D. and Hutchings, K., 2012. Thermochemical and kinetic aspects of the sulfurization of Cu-Sb and Cu-Bi thin films. Journal of Solid State Chemistry, 186, pp. 36-46.

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    CuSbS2 and Cu3BiS3 are being investigated as part of a search for new absorber materials for photovoltaic devices. Thin films of these chalcogenides were produced by conversion of stacked and co-electroplated metal precursor layers in the presence of elemental sulfur vapour. Ex-situ XRD and SEM/EDS analyses of the processed samples were employed to study the reaction sequence with the aim of achieving compact layer morphologies. A new "Time-Temperature-Reaction" (TTR) diagram and modified Pilling-Bedworth coefficients have been introduced for the description and interpretation of the reaction kinetics. For equal processing times, the minimum temperature required for CuSbS2 to appear is substantially lower than for Cu3BiS3, suggesting that interdiffusion across the interfaces between the binary sulfides is a key step in the formation of the ternary compounds. The effects of the heating rate and sulfur partial pressure on the phase evolution as well as the potential losses of Sb and Bi during the processes have been investigated experimentally and the results related to the equilibrium pressure diagrams obtained via thermochemical computation. 2011 Elsevier Inc. All rights reserved.


    Item Type Articles
    CreatorsColombara, D., Peter, L. M., Rogers, K. D. and Hutchings, K.
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    DepartmentsFaculty of Science > Chemistry
    Publisher StatementColombara_JSSC_2012_186_36.pdf: NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Solid State Chemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Solid State Chemistry, vol 186, 2012, DOI 10.1016/j.jssc.2011.11.025
    ID Code28074


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