Comparison of Characteristics of Thermostimulated Luminescence of CdS Nanostructures Obtained by Green Synthesis and Chemical Method

Authors S. Kutovyy1, A. Kormilitsina1, O. Stanovyi1, V. Pashchenko1, M. Borova2, A. Yemets2

1Taras Shevchenko National University of Kyiv, 64/13 Volodymyrs’ka St., 01601 Kyiv, Ukraine

2Institute of Food Biotechnology and Genomics of the National Academy of Sciences of Ukraine, 2a Osipovskoho St., 04123 Kyiv, Ukraine

Issue Volume 14, Year 2022, Number 2
Dates Received 26 November 2021; revised manuscript received 13 April 2022; published online 29 April 2022
Citation S. Kutovyy, A. Kormilitsina, et al., J. Nano- Electron. Phys. 14 No 2, 02018 (2022)
PACS Number(s) 78.60.Kn
Keywords Thermostimulated luminescence, CdS nanoparticles, Green synthesis, Traps (2) , Activation energy (7) .

CdS nanoparticles obtained by green synthesis in biosystems of the basidiomycete fungus Pleurotus ostreatus and roots of Linaria maroccana were studied for the first time by the method of thermoluminescence (TL) in the temperature range 80-400 K. To compare the TL characteristics of CdS nanoparticles obtained by green synthesis with others, samples of two types of CdS, of nano- and micro-sizes, grown by chemical methods, were studied. Since the luminescence intensity was low and the integral TL curve was practically not divided into elementary peaks, activation energies were determined by the form of elementary TL curves, which were obtained by decomposing the integral curve into elementary contours according to the formulas for linear and quadratic TL kinetics. It was found that the values of activation energy of traps of CdS nanoparticles obtained by green synthesis are in the range of 0.09-0.53 eV, which correlates with the obtained values of activation energy for the corresponding TL bands of CdS samples obtained by chemical methods (0.07-0.62 eV). For all types of CdS samples, the TL curves have a similar shape and almost one composition of elementary peaks, which differ only in the intensity distribution of individual peaks. That is, regardless of the method of particle synthesis, they have a similar defective structure, and, accordingly, a similar nature of TL. In general, based on TL studies, it is concluded that CdS nanoparticles obtained by green synthesis are of sufficient quality, in their defective structure they are almost indistinguishable from CdS nanoparticles obtained by traditional chemical methods, and is a promising material for widespread use, and such CdS is a relatively environmentally friendly material.

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