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Reaction Tailoring for Synthesis of Phase‐Pure Nanocrystals of AgInSe 2 , Cu 3 SbSe 3 and CuSbSe 2
Author(s) -
Kshirsagar Anuraj S.,
Khanna Pawan. K.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702986
Subject(s) - orthorhombic crystal system , ternary operation , stoichiometry , x ray photoelectron spectroscopy , nanocrystal , chalcogenide , selenide , phase (matter) , bromide , amine gas treating , materials science , phase diagram , crystal structure , chemistry , chemical engineering , nuclear chemistry , crystallography , nanotechnology , inorganic chemistry , selenium , organic chemistry , computer science , engineering , programming language
Present article highlights synthesis of phase pure I, III, VI 2 and I, V, VI 2 ternary selenides nanocrystals (NCs) using oleic acid and oleyl amine capping agents. The synthesis of AgInSe 2 (AISe), Cu 3 SbSe 3 and CuSbSe 2 (CSSe) NCs was executed by employing cyclohexeno‐1,2,3‐selenadiazole (SDZ) as Se precursor. The current study is the first report describing use of thermally labile organoselenium compound for the synthesis of such technologically important ternary selenide NCs. Systematic study of the formation of AISe and CSSe NCs at different reaction time is carried out in order to confirm phase purity and stoichiometry. The spherical, stoichiometric and NIR active semiconductors showed formation of orthorhombic crystal structure as confirmed from XRD analysis. It was observed that formation of phase pure AISe NCs requires 5 hours (h) of constant heating at about 220 ο C irrespective of the capping agents however, CuSbSe 2 was obtained within an hour in presence of oleyl amine at same reaction temperature. Nanocrystals were characterized by different analytical tools such as UV‐Visible spectroscopy, FTIR, XRD, SEM/EDS, TEM, particle size and XPS analysis. Based on the results, possible chemical reaction pathway for ternary chalcogenide is presented.