Mechanochemically synthesized nanocrystalline ternary CuInSe2 chalcogenide semiconductor

• Published in: Materials letters 2016-06, Vol.173, p.182-186
• Main Authors: Dutkova, Erika, Sayagues, Maria J, Kovac, Jaroslav, Kovac, Jaroslav Jr, Bujakova, Zdenka, Briancin, Jaroslav, Zorkovska, Anna, Balaz, Peter, Ficeriova, Jana
• Format: Article
• Language: English
• Subjects: ATMOSPHERES; CHALCOPYRITE; COPPER INDIUM SELENIDE; CRYSTAL STRUCTURE; Crystallites; CuInSe2; Indium; Mechanochemical synthesis; MICA; Nanocrystals; Nanoparticles; PARTICLES; Phonons; Planetary atmospheres; Planetary mills; Semiconductor; SEMICONDUCTORS
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2016.03.051

The synthesis of nanocrystalline ternary CuInSe2 particles prepared by high-energy milling in a planetary mill in an argon atmosphere from copper, indium and selenium was reported. CuInSe2 particles crystallize in the tetragonal structure with the crystallite size of about 30.5nm. The Raman spectrum of CuInSe2 nanoparticles shows a strong peak at 176cm−1 corresponds to the A1 phonon mode of tetragonal CuInSe2 chalcopyrite. HRTEM measurements also revealed the presence of nanocrystals with the size of 10–20nm with the tendency to form agglomerates. The optical absorption study shows that nanoparticles have direct optical band gap energy of 1.8eV. The quantum size effect of the particles was confirmed also by PL measurement. •CuInSe2nanocrystalline semiconductor particles were prepared by mechanochemical synthesis up to 60min.•The crystallite size 30.5nm was achieved.•The synthesized material has a tetragonal body-centred crystalline structure.•The band gap of the nanocrystalline CuInSe2 was determined as 1.8eV.•CuInSe2 nanoparticles are promising candidates for optical applications.