|
This article is cited in 15 scientific papers (total in 15 papers)
Semiconductor structures, low-dimensional systems, quantum phenomena
Size-dependent optical properties of colloidal CdS quantum dots passivated by thioglycolic acid
T. S. Kondratenkoa, M. S. Smirnova, O. V. Ovchinnikova, E. V. Shabunya-Klyachkovskayab, A. S. Matsukovichb, A. I. Zvyagina, Y. A. Vinokura a Voronezh State University
b B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk
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.
Keywords:
Thioglycollic Acid (TGA), Luminescence Excitation Spectra, Donor Acceptor Mechanism, Luminescence Decay, Luminescence Band.
Received: 15.09.2017 Accepted: 18.10.2017
Citation:
T. S. Kondratenko, M. S. Smirnov, O. V. Ovchinnikov, E. V. Shabunya-Klyachkovskaya, A. S. Matsukovich, A. I. Zvyagin, Y. A. Vinokur, “Size-dependent optical properties of colloidal CdS quantum dots passivated by thioglycolic acid”, Fizika i Tekhnika Poluprovodnikov, 52:9 (2018), 1015–1022; Semiconductors, 52:9 (2018), 1137–1144
Linking options:
https://www.mathnet.ru/eng/phts5732 https://www.mathnet.ru/eng/phts/v52/i9/p1015
|
Statistics & downloads: |
Abstract page: | 48 | Full-text PDF : | 24 |
|