Abstract
The mass transfer from target to films is incongruent for chalcogenide sulfides in contrast to the expectations of pulsed laser deposition (PLD) as a stoichiometric film growth process. Films produced from a CZTS (Cu2ZnSnS4) multi-component target have no Cu below a fluence threshold of 0.2 J/cm2, and the Cu content is also very low at low fluence from a single-component target. Above this threshold, the Cu content in the films increases almost linearly up to a value above the stoichiometric value, while the ratio of the concentration of the other metals Zn to Sn (Zn/Sn) remains constant. Films of a similar material CTS (Cu2SnS3) have been produced by PLD from a CTS target and exhibits a similar trend in the same fluence region. The results are discussed on the basis of solid-state data and the existing data from the literature.
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Acknowledgements
This work was supported by a grant from the Danish Council for Strategic Research. The work was also supported by the institutional research funding project IUT 19–28 of the Estonian Ministry of Education and Research, and by the European Union Regional Development Fund, Project TK141.
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Schou, J., Gansukh, M., Ettlinger, R.B. et al. Pulsed laser deposition of chalcogenide sulfides from multi- and single-component targets: the non-stoichiometric material transfer. Appl. Phys. A 124, 78 (2018). https://doi.org/10.1007/s00339-017-1475-3
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DOI: https://doi.org/10.1007/s00339-017-1475-3