Abstract.
A method for the rapid determination of the real stoichiometry of small CuInSe2 semiconductor crystals is presented. The powdered crystal samples have been weighed and acid dissolved in a closed dissolution system connected to a FI manifold for flame atomic absorption spectrometry (AAS) determination. The accuracy has been assessed by comparing the results obtained with those by conventional AAS, and by analyzing CuInSe2 polycrystals of known stoichiometry. The results obtained with the proposed method are in a good agreement with the expected values. The method allows the dissolution of the crystals without any detectable loss of selenium and has been applied to the analysis of small samples of CuInSe2 monocrystals as a method for routine monitoring during the development of synthesis methods and in homogeneity studies of the crystal ingots.
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Received 28 February 1995/Accepted 14 April 1995
Acknowledgements. This work was possible thanks to the financial support of the Consejo Cientifico, Humanístico y Tecnológico (CDCHT) of the Los Andes University.
Correspondence to: J.L. Burguera
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de la Cruz, A., Burguera, J., Burguera, M. et al. A flow injection-flame-atomic absorption spectrometry system for the determination of the real stoichiometry of small CuInSe2 semiconductor crystals. Fresenius J Anal Chem 354, 184–187 (1996). https://doi.org/10.1007/PL00012718
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DOI: https://doi.org/10.1007/PL00012718