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Exploring the Cu‐In‐S System under Solvothermal Conditions near the Composition CuIn 5 S 8
Author(s) -
Lühmann Henning,
QuirogaGonzález Enrique,
Kienle Lorenz,
Duppel Viola,
Neubüser Gero,
Bensch Wolfgang
Publication year - 2019
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800421
Subject(s) - wurtzite crystal structure , nanocrystalline material , indium , materials science , crystallography , crystallization , morphology (biology) , composition (language) , thin film , copper , solvothermal synthesis , zinc , chemical engineering , nanotechnology , metallurgy , chemistry , linguistics , philosophy , biology , engineering , genetics
Solvothermal syntheses of copper‐indium‐sulfides performed with different Cu:In:S ratios afforded crystallization of nanocrystalline Cu‐In‐S phases with compositions close to CuInS 2 , CuIn 3 S 5 , and CuIn 7 S 11 . Each sample shows a different and distinguishable morphology. The minority component CuInS 2 with wurtzite‐type structure crystallizes as thin plates, which are preferably stacked parallel to black stacks. The component with composition CuIn 3 S 5 forms isolated few nm thin layers being arranged like the petals of a flower growing from a common point. Finally, red CuIn 7 S 11 is obtained as nanobelts with individual diameters of about 20 nm and lengths up to more than 1 μm. According to electron diffraction patterns and X‐ray diffractometry the structures of CuIn 3 S 5 and CuIn 7 S 11 cannot be assigned to known bulk phases of the Cu‐In‐S system, however first structure models are proposed.