Size-Dependent Optical Properties of Colloidal CdS Quantum Dots Passivated by Thioglycolic Acid
- Авторы: Kondratenko T.1, Smirnov M.1, Ovchinnikov O.1, Shabunya-Klyachkovskaya E.2, Matsukovich A.2, Zvyagin A.1, Vinokur Y.1
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Учреждения:
- Voronezh State University
- Stepanov Institute of Physics, National Academy of Sciences of Belarus
- Выпуск: Том 52, № 9 (2018)
- Страницы: 1137-1144
- Раздел: 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
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Аннотация
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.
Об авторах
T. Kondratenko
Voronezh State University
Email: smirnov_m_s@mail.ru
Россия, Voronezh, 394018
M. Smirnov
Voronezh State University
Автор, ответственный за переписку.
Email: smirnov_m_s@mail.ru
Россия, Voronezh, 394018
O. Ovchinnikov
Voronezh State University
Email: smirnov_m_s@mail.ru
Россия, Voronezh, 394018
E. Shabunya-Klyachkovskaya
Stepanov Institute of Physics, National Academy of Sciences of Belarus
Email: smirnov_m_s@mail.ru
Белоруссия, Minsk, 220072
A. Matsukovich
Stepanov Institute of Physics, National Academy of Sciences of Belarus
Email: smirnov_m_s@mail.ru
Белоруссия, Minsk, 220072
A. Zvyagin
Voronezh State University
Email: smirnov_m_s@mail.ru
Россия, Voronezh, 394018
Y. Vinokur
Voronezh State University
Email: smirnov_m_s@mail.ru
Россия, Voronezh, 394018