Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 12, pp. 1845−1850.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © K.A. Ogurtsov, M.M. Sychov, V.V. Bakhmetyev, T.S. Minakova, N.S. Striga, Yu.S. Striga, A.A. Eruzin, I.L. Grinshtein, A.V. Khripun,
A.S. Zemlyankina, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 12, pp. 1957−1963.
ELECTRO- AND PLASMA
Effect of Plasmochemical Modiﬁ cation on Electro-Optical
and Surface Properties of Zinc Sulﬁ de
K. A. Ogurtsov
, M. M. Sychov
, V. V. Bakhmetyev
, T. S. Minakova
, N. S. Striga
Yu. S. Striga
, A. A. Eruzin
, I. L. Grinshtein
, A. V. Khripun
, and A. S. Zemlyankina
St. Petersburg State Institute of Technology, St. Petersburg, Russia
Tomsk State University, Tomsk, Russia
Analyte Products OOO, St. Petersburg, Russia
Received June 6, 2012
Abstract—Method for improving the brightness of photo- and electroluminescence from ZnS:Cu and ZnS:Cu, Al
phosphors by their treatment in a low-temperature gas-discharge plasma was developed. The relationship between
the luminescence brightness and spectra and surface properties of the phosphors was studied. The mechanism of
processes that occur on the surface and in the bulk of phosphor particles during their bombardment with plasma
ions was determined.
Electroluminescent sources of light, based on
powdered zinc sulﬁ de electroluminescent phosphors
(ELPs) have been known rather long. However,
despite the numerous advantages (low electric power
expenditure, small weight, ﬂ exibility, shock resistance),
their application is restricted by the insufﬁ ciently high
brightness. Various treatment methods can be used to
raise the brightness of zinc sulﬁ de ELPs. For example,
modiﬁ cation with medium-energy electrons has been
used previously [1–6] for this purpose, which made it
possible to substantially raise the brightness of ﬁ nished
ELPs . The main obstacle to industrial application
of this method is that it requires rare and expensive
equipment: medium-energy electron accelerator of
the resonant-transformer type. It is desirable to use
for industrial purposes a lower cost and more easily
implementable method for modiﬁ cation of ELPs.
A possible candidate is the plasma treatment.
In contrast to medium-energy electrons, which
have a high penetrating capacity and act on the entire
volume of phosphor particles, plasma ions affect only
their surface layers. Therefore, purposeful control over
the ELP properties via plasma modiﬁ cation requires
a study of how plasma ions affect the bulk and surface
properties of ELP particles.
As object of study were chosen the industrial ELPs
E-455-115(220) (chemical composition ZnS:Cu) and
E-515-115(220) (ZnS:Cu, Al) manufactured by NPF
Lyuminofor ZAO (Stavropol, Russia).
Our communication reports on a study of the effect of
a plasma treatment of these phosphors on their electro-
optical and surface properties.
The plasmochemical modiﬁ cation of the ELPs in
a low-temperature gas-discharge plasma was carried out
on an NNV-6.6I1 installation (Bulat).
The vacuum chamber of the installation has the form
of a vertical cylindrical vessel with a side opening closed
with a door. The case has double walls forming a hollow
for water cooling or heating. There is a spiral cathode
inside the chamber, with the chamber walls serving as the
anode. A phosphor to be treated is placed on a rotating
metallic table situated at the chamber center.