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Proceedings Paper

Synthesis of cadmium-free quantum dots based on CuInS2 nanocrystals
Author(s): Anastasiya S. Novikova; Valentina V. Goftman; Irina Y. Goryacheva
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Paper Abstract

We report an efficient synthesis Cd-free CuInS2/ZnS (CIS/ZnS) quantum dots (QDs) using low toxic precursors and investigation of their optical properties. The nanocrystals have been obtained via reaction between the acetate salts of the corresponding metals and elemental sulfur in the presence of dodecanethiol in octadecene media at 220°C. Influence of various experimental variables, including temperature, time, ratio of Cu and In precursors were investigated. Thus, it was shown that the photoluminescence (PL) emission wavelength can be tuned by conveniently changing the stoichiometric ratio of the components. The plain CIS nanocrystals did show PL emission but with quite low PL quantum yield (QY). In order to increase the QY of QD luminescence by compensation of the surface defects of QDs cores, the process of covering with ZnS shells was done. During shelling process, increasing of QY and blue shift of emission maximum were detected.

Paper Details

Date Published: 21 April 2016
PDF: 7 pages
Proc. SPIE 9917, Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS), 991714 (21 April 2016); doi: 10.1117/12.2229852
Show Author Affiliations
Anastasiya S. Novikova, Saratov State Univ. (Russian Federation)
Valentina V. Goftman, Saratov State Univ. (Russian Federation)
Ghent Univ. (Belgium)
Irina Y. Goryacheva, Saratov State Univ. (Russian Federation)
Saint-Petersburg State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 9917:
Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh Finnish-Russian Photonics and Laser Symposium (PALS)
Elina A. Genina; Valery V. Tuchin; Vladimir L. Derbov; Dmitry E. Postnov; Igor V. Meglinski; Kirill V. Larin; Alexander Borisovich Pravdin, Editor(s)

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