Size-Dependent Optical Properties of Colloidal CdS Quantum Dots Passivated by Thioglycolic Acid
- Authors: Kondratenko T.S.1, Smirnov M.S.1, Ovchinnikov O.V.1, Shabunya-Klyachkovskaya E.V.2, Matsukovich A.S.2, Zvyagin A.I.1, Vinokur Y.A.1
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Affiliations:
- Voronezh State University
- Stepanov Institute of Physics, National Academy of Sciences of Belarus
- Issue: Vol 52, No 9 (2018)
- Pages: 1137-1144
- Section: Semiconductor Structures, Low-Dimensional Systems, and Quantum Phenomena
- URL: https://journals.rcsi.science/1063-7826/article/view/204000
- DOI: https://doi.org/10.1134/S1063782618090087
- ID: 204000
Cite item
Abstract
The results of studies of the optical properties of ensembles of colloidal CdS quantum dots passivated by thioglycolic acid are reported. The average dimensions of the quantum dots lie in the range from 1.7 to 5.8 nm. By X-ray diffraction studies and Raman spectroscopy, it is established that quantum dots crystallize with the formation of a cubic crystal lattice. The systematic features of the quantum-confinement effect in the optical absorption and luminescence spectra, as well as in the luminescence excitation spectra, are established. The features manifest themselves as a blue shift of the corresponding bands with decreasing quantum-dot dimensions. From analysis of the nanosecond luminescence kinetics, it is concluded that experimentally observed radiative recombination proceeds by the donor–acceptor mechanism.
About the authors
T. S. Kondratenko
Voronezh State University
Email: smirnov_m_s@mail.ru
Russian Federation, Voronezh, 394018
M. S. Smirnov
Voronezh State University
Author for correspondence.
Email: smirnov_m_s@mail.ru
Russian Federation, Voronezh, 394018
O. V. Ovchinnikov
Voronezh State University
Email: smirnov_m_s@mail.ru
Russian Federation, Voronezh, 394018
E. V. Shabunya-Klyachkovskaya
Stepanov Institute of Physics, National Academy of Sciences of Belarus
Email: smirnov_m_s@mail.ru
Belarus, Minsk, 220072
A. S. Matsukovich
Stepanov Institute of Physics, National Academy of Sciences of Belarus
Email: smirnov_m_s@mail.ru
Belarus, Minsk, 220072
A. I. Zvyagin
Voronezh State University
Email: smirnov_m_s@mail.ru
Russian Federation, Voronezh, 394018
Y. A. Vinokur
Voronezh State University
Email: smirnov_m_s@mail.ru
Russian Federation, Voronezh, 394018