S. V. Rempel', A. A. Podkorytova, A. A. Rempel, “Concentration quenching of fluorescence of colloid quantum dots of cadmium sulfide”, Fizika Tverdogo Tela, 2014, Volume 56, Issue 3,Pages <nobr>549

This article is cited in 18 papers

Optical properties

Concentration quenching of fluorescence of colloid quantum dots of cadmium sulfide

S. V. Rempel'^ab, A. A. Podkorytova^a, A. A. Rempel^ab

^a Institute of Solid State Chemistry, Urals Branch of the Russian Academy of Sciences, Ekaterinburg
^b Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg

Abstract: The influence of the concentration of cadmium sulfide nanoparticles in a colloid aqueous solution on its optical properties has been investigated. The band gap of cadmium sulfide nanoparticles is calculated based on the optical absorption spectra of solutions with different concentrations. The band gap coincides for all the samples irrespective of their concentration and is equal to 2.63 eV. It is found that the intensity of fluorescence substantially depends on the solution concentration. The fluorescence intensity considerably decreases in a wavelength range from 665 to 720 nm as the concentration increases above 3.25 mM. This concentration is the threshold of the concentration quenching for CdS nanoparticles.

Received: 30.07.2013