|
This article is cited in 2 scientific papers (total in 2 papers)
Semiconductor structures, low-dimensional systems, quantum phenomena
Photoluminescence of (Zn,Pb,Mn)S quantum dots in polyacrylate matrix
A. A. Isaeva, V. P. Smagin Altai State University, Barnaul
Abstract:
Solutions of quantum dots (Zn,Pb,Mn)S with different mole ratio of cations were obtained by colloidal synthesis in methyl methacrylate (MMA) medium. By thermal polymerization of MMA in the block, colloidal solutions are transferred to the glassy state. The optical transparency of PMMA/(Zn,Pb,Mn)S compositions at wavelengths $>$ 500 nm reaches 90% with the thickness of the absorbing layer up to 5 mm. Photoluminescence of compositions in the spectral region of 400–480 nm is associated with electron recombination at the levels of defects in the crystal structure of ZnS, in the range of 520–620 nm with $^4$T$_1\to^{6}$A$_1$ electron transition in Mn$^{2+}$ ions. Excitation of photoluminescence occurs as a result of interband transitions in ZnS and energy transfer from the conduction band of ZnS to Mn$^{2+}$ ion levels. The luminescence spectrum depends on the molar ratio of Mn$^{2+}$ and Pb$^{2+}$ ions, the sequence of introduction of the components into the reaction mixture, the wavelength of the exciting radiation.
Keywords:
quantum dots, zinc sulfide, doping, lead ions, manganese ions, acrylate compositions, luminescence.
Received: 25.11.2019 Revised: 16.12.2019 Accepted: 16.12.2019
Citation:
A. A. Isaeva, V. P. Smagin, “Photoluminescence of (Zn,Pb,Mn)S quantum dots in polyacrylate matrix”, Fizika i Tekhnika Poluprovodnikov, 54:5 (2020), 435–440; Semiconductors, 54:5 (2020), 511–517
Linking options:
https://www.mathnet.ru/eng/phts5226 https://www.mathnet.ru/eng/phts/v54/i5/p435
|
Statistics & downloads: |
Abstract page: | 42 | Full-text PDF : | 20 |
|