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- Title
Synthesis and characterization of CuInS nanocrystalline semiconductor prepared by high-energy milling.
- Authors
Dutková, Erika; Sayagués, María; Briančin, Jaroslav; Zorkovská, Anna; Bujňáková, Zdenka; Kováč, Jaroslav; Baláž, Peter; Ficeriová, Jana
- Abstract
Nanocrystalline CuInS particles have been synthesized from copper, indium, and sulfur powders by high-energy milling in a planetary mill in an argon atmosphere. Structural characterization of the prepared nanoparticles, including phase identification, Raman spectroscopy, specific surface area measurement, and particle size analysis were performed. The optical properties were studied using UV-Vis absorption and photoluminescence (PL) spectroscopy. The production of CuInS (JCPDS 027-0159) particles with a crystallite size of about 17.5-23.5 nm was confirmed by X-ray diffraction. The crystal structure has a tetragonal body-centered symmetry belonging to the I-42d space group. The Raman spectra also proved the formation of pure CuInS nanoparticles. TEM and HRTEM measurements revealed the presence of nanoparticles of different dimensions (10-20 nm) and their tendency to form agglomerates. The nanoparticles tend to agglomerate due to their large specific surface area. The average size of the synthesized particles was determined by photon cross-correlation spectroscopy to be in the range of 330-530 nm (bimodal size distribution). The band gap of the CuInS particles is 2 eV which is wider than that in bulk materials. The decrease in size leads to the blue-shift of the PL spectra. Therefore, CuInS nanoparticles are promising candidates for optical applications, and they have high potential in solar energy conversion.
- Subjects
COPPER crystals; NANOCRYSTALS; SEMICONDUCTORS; METAL powders; RAMAN spectroscopy
- Publication
Journal of Materials Science, 2016, Vol 51, Issue 4, p1978
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-015-9507-x