OPTICAL PROPERTIES OF MULTILAYER STRUCTURES ON THE BASIS OF SOLID SOLUTIONS OF THE SYSTEM CdS–ZnS, OBTAINED BY THE METHOD OF PYROLYSIS OF AEROSOL

  • Olga V. Zvyagina the competitor for science degree of Master Science in Chemistry, Voronezh State University; ph.: +7(951) 8781317, e-mail: orebenok@mail.ru
  • Victor N. Semenov Dr. Sci. (Chem.), Head of General and Inorganic Chemistry, Voronezh State University; ph.: +7(473) 2208610, e-mail: office@chem.vsu.ru
  • Tatyana V. Samofalova Cand. Sci. (Chem.), Assistant Lecturer, Department of General and Inorganic Chemistry, Voronezh State University; ph.: +7(473) 2208610, e-mail: TSamofalova@bk.ru
Keywords: multilayer semiconductor structures, solid solutions of CdS-ZnS, photoluminescence, photoconductivity

Abstract

Multilayer film structures based on solid solutions of the CdS-ZnS system with variable thickness- concentrations of cadmium and zinc were obtained by the pyrolysis of aerosol solutions of thiocarbamide coordination compounds. Their transmission spectra, the photoluminescence spectra, and the temperature dependence of the photocurrent are studied. It is shown that the photocurrent at the wavelength of the exciting light (380 nm) is not monotonically dependent on the temperature, which is associated with the competition of carrier excitation and recombination processes

The purpose of this work is to study the crystal structure and properties of multilayer structures synthesized by pyrolysis of aerosol on the basis of solid solutions of the CdS-ZnS system with successive changes in the ratios of the atomic fractions of cadmium and zinc ions

It is established that the highest photoluminescence intensity is observed for layers precipitated from TCS [M (N2H4CS) 2CI2]. For all the samples, the luminescence bands broadened.

The results of X-ray phase analysis showed that all the layers deposited in the multilayer structure have a wurtzite modification, are polycrystalline, and have a pronounced crystallization direction.

The multilayer structures synthesized from [M(N2H4CS)2Br2] have a steady-state current value comparable to the values for individual CdS synthesized under similar conditions.

Optical studies have shown that the transmission spectra do not reflect the intrinsic absorption edge for each deposited layer.

The value of the bandgap width for CdS → ZnS samples is slightly increased when compared with individual CdS. Multilayer ZnS → CdS samples synthesized from chloride coordination compounds have a greater optical width compared to samples from bromide TCS.

ACKNOWLEDGMENTS

The research results were obtained with equipment of Voronezh State University Centre for Collective Use of Scientific Equipment.

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References

1. Thahab S. M. Materials Science in Semiconductor Processing, 2014, no. 26, pp. 49-54. doi.org/10.1016/j.mssp.2014.04.005
2. Burmaeva N. V. Fundamentals of Semiconductor Electronics. Moscow, Fizmatlit Publ., 2012, 310 p. (in Russian)
3. Semenov V. N., Naumov A. V. Proceedings of Voronezh State University. Series: Chemistry. Biology. Pharmacy, 2000, no. 2, pp. 50-55. Available at: http://www.vestnik.vsu.ru/pdf/chembio/2000/02/semenov.pdf
4. Powder Diffraction File. Swarthmore: Joint Committee on Powder Diffraction Standards, 1996.
5. Uhanov Yu. M. Optical Properties of Semiconductors. Moscow, Science Publ. 1977, 366 p. (in Russian)
6. Knotko A. V. Solid State Chemistry: Textbook. Allowance for stud. Supreme. Training. Institutions, M.: Publishing Center "Academy" Publ., 2006, 304 p. (in Russian)
7. Naumov A. V., Bolgova T. G., Semenov V. N., et al. Inorg. Mater., 2000, vol. 42, no. 5, pp. 523-529.
8. Samofalova T. V., Semenov V. N., Takmakova E. V., Ovechkina N. M. Proceedings of Voronezh State University. Series: Chemistry. Biology. Pharmacy, 2015, no. 1, pp. 42-48. Available at: http://www.vestnik.vsu.ru/pdf/chembio/2015/01/2015-01-07.pdf (in Russian)
9. Nituta A. N., Rebenok O. V., Takmakova E. V. “Physicochemical Processes in Condensed Matter and on Interphase Boundaries”, Proceedings of the 7-th All-Russian Conference, 2015, p. 245-246.
10. Samofalova T. V., Semenov V. N. Condensed Matter and Interphase, 2016, vol. 18, no. 2, pp. 248-255. Available at: http://www.kcmf.vsu.ru/resources/t_18_2_2016_009.pdf (in Russian)
11. Samofalova T. V., Meteleva Yu. V., Naumov A. V., Semenov V. N., Novikov G. F. Condensed Matter and Interphase, 2007, vol. 9, no. 2, pp. 152-155. Available at: http://www.kcmf.vsu.ru/resources/t_09_2_2007_011.pdf (in Russian)
12. Meteleva Yu. V. Inorg. Mater., 2001, vol. 37, no. 12, pp. 1435-1438.
13. Lukin A. N., Samofalova T. V., Semenov V. N., Naumov A. V. News of Higher Educational Institutions: Physics, 2011, vol. 54, no. 2/2, pp. 211-215.
Published
2017-11-07
How to Cite
Zvyagina, O. V., Semenov, V. N., & Samofalova, T. V. (2017). OPTICAL PROPERTIES OF MULTILAYER STRUCTURES ON THE BASIS OF SOLID SOLUTIONS OF THE SYSTEM CdS–ZnS, OBTAINED BY THE METHOD OF PYROLYSIS OF AEROSOL. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 19(3), 352-358. https://doi.org/10.17308/kcmf.2017.19/211
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Статьи