Influence of Technology on the Formation of Luminescence Centers in CdS Quantum Dots

Authors V.A. Smyntyna1 , V.M. Skobeeva2 , K.A. Verheles1 , N.V. Malushin2

1I.I. Mechnikov National University of Odesa, 2, Dvoryanskaya St., 65082 Odesa, Ukraine

2I.I. Mechnikov National University of Odesa, 27, Paster St., 65082 Odesa, Ukraine

Issue Volume 11, Year 2019, Number 3
Dates Received 17 June 2019; revised manuscript received October 2019; published online 25 October 2019
Citation V.A. Smyntyna, V.M. Skobeeva, K.A. Verheles, N.V. Malushin, J. Nano- Electron. Phys. 11 No 3, 05031 (2019)
PACS Number(s) 78.30.Jw, 78.67.Hc
Keywords Cadmium sulfide quantum dots, Intrinsic defects in CdS QDs, Absorption (16) , Photoluminescence (17) .
Annotation The paper describes results of the research on the effect of the synthesis of cadmium sulfide quantum dots by the colloid-chemical method in an aqueous solution of gelatins on their optical and luminescent properties. It was shown that to understand the mechanism of the formation of defects in CdS QDs when they are synthesized in aqueous solutions of salts, it is necessary to take into account the result of the hydrolysis process and the dependence of its products on the pH of the solution. Based on the calculation of the molar concentration of the components of the hydrolysis of the cadmium salt Cd(NO3)2, the conclusion was drawn about the types of intrinsic defects that determine the observed photoluminescence spectrum of CdS QDs.

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