Luminescence of ZnS:Cu particles modified by shungite nanocarbon

This paper presents a study of the luminescence properties of the commercial phosphor ZnS:Cu modified with nanoparticles of shungite carbon. It shows that even a small amount of the modifying additive causes substantial surface darkening of the phosphor and reduces the reflectance at a wavelength of 490 nm. A number of competing processes are observed: a reduction of the luminance of the electroluminescence because part of the emitted light is absorbed, and an increase of the luminance, probably because the electric field is concentrated on the phosphor particles. Besides altering the luminance, such modification alters the electroluminescence spectra. Modification by shungite-carbon nanoparticles is thus promising from the viewpoint of directed adjustment of the characteristics of commercial phosphors, and optimizing the modification conditions makes it possible to obtain luminescence whose luminance exceeds that in unmodified samples. © 2017 Optical Society of America.

Authors
Sychev M.M.1, 2 , Myakin S.V.1 , Ogurtsov K.A.1 , Rozhkova N.N.3 , Vasina E.S.1 , Matveǐchikova P.V.1, 2 , Belyaev V.V. 4, 5
Publisher
Optical Society of America (OSA)
Number of issue
1
Language
English
Pages
49-52
Status
Published
Volume
84
Year
2017
Organizations
  • 1 St. Petersburg State Technological Institute, Technical University, St. Petersburg, Russian Federation
  • 2 I. V. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, Russian Federation
  • 3 Institute of Geology, Karelian Science Center, Russian Academy of Sciences, Petrozavodsk, Russian Federation
  • 4 Moscow State Regional University, Moscow, Russian Federation
  • 5 Russian University of Friendship of Nations, Moscow, Russian Federation
Keywords
Electric fields; Electroluminescence; Light; Light emission; Luminescence; Nanoparticles; Phosphors; Zinc sulfide; Carbon Nano-Particles; Competing process; Electroluminescence spectra; Emitted light; Luminescence properties; Modification conditions; Modifying additives; Phosphor particles; Luminance
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/6363/
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