Synthesis of CuInS2 nanocrystals from a molecular complex - characterization of the orthorhombic domain structure

CuInS2 nanocrystals were synthesized by thermal decomposition of the molecular precursor [(Me3P)3Cu(SC2H4S)In(i)Pr2] in the presence of oleylamine in dioctyl phthalate. According to X-ray diffraction patterns, the as-synthesized CuInS2 nanocrystals crystallize in the wurtzite type structure. High-re...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2015-08, Vol.44 (32), p.14227-14234
Main Authors: Cholula-Díaz, Jorge L, Wagner, Gerald, Friedrich, Dirk, Oeckler, Oliver, Krautscheid, Harald
Format: Article
Language:English
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Summary:CuInS2 nanocrystals were synthesized by thermal decomposition of the molecular precursor [(Me3P)3Cu(SC2H4S)In(i)Pr2] in the presence of oleylamine in dioctyl phthalate. According to X-ray diffraction patterns, the as-synthesized CuInS2 nanocrystals crystallize in the wurtzite type structure. High-resolution transmission electron images and selected area electron diffraction patterns reveal a nanodomain structure. The individual domains are approximately 5-10 nm in size and characterized by short-range cation ordering, which assuming hypothetical long-range order, corresponds to an orthorhombic superstructure (space group Pmc21, a = 4.09 ± 0.01 Å, b = 7.16 ± 0.02 Å and c = 6.56 ± 0.03 Å). The domains are separated by twin and antiphase boundaries.
ISSN:1477-9234
DOI:10.1039/c5dt00419e