Dr Stefan K. Balabanov
sbalab@issp.bas.bg
Born: in
Graduated: from the Faculty of Physics at the
The same year he was appointed as researcher at the Laboratory " Photoelectric Properties of Semiconductors" of
the
He obtained his PhD degree in 1975 on the thesis "Surface Photoelectric
Processes in Cadmium Sulphide Under
the Influence of Oxygen and Water Vapours". In
1978 he joined the Laboratory for optical recording of information on amorphous
semiconductors.
Since 1980 he carries out investigations on the electrical, optical and
properties of thin dielectric layers after ion implantation with carbon. Since
1985 he is Associate Professor.
He has been carrying diffuse optical spectra investigations in the visible range for amorphoussemiconductor films. These studies have been alsoextended into the direction of defining the changesin the optical and electrical properties of differentpolymers implanted with carbon (C+), selenium (Se+) and silicon (Si+) ions. Post implantationgamma irradiation has been used for effectivemodification of the obtained changed by the ionimplantation properties of the polymer surfaces.These changes are characteristic both for the visible
and the near ultra-violet (UV) range (up to 220 nm) of the spectrum, changing drastically their electro-physical properties as well. The results obtained during recent years have been
cited in a number of publications and the monography"Photovhemistry", v.35, 450 pages, editor I.Dunkin,Royal Society of Chemistry Publishing, London, 2005,
Scientific publications: over 94.
S. Balabanov, E. Skordeva,
C. Marinova, "Peculiarities of the D.C.
Conductivity of Thin Amorphous As-Se Layers. After C+
Implantation", Physica Status Solidi (a), 151, 143-149 (1995).
S. Balabanov, T. Tsvetkova,
K. Nanev, E. Skordeva, C. Marinova, "Formation of Carbon Aggregates in Ion
Implanted Amorphous As-Se", Journal of Non-Crystalline Solids, 192&193,
482-485 (1995).
K. Velichkova,
K. Krezhov, S. Balabanov,
"Temperature Dependence of Surface D.C. Electrical Conductivity of
Carbon-Implanted Polymers Modified by Gamma Irradiation", Vacuum, 58,
531-535 (2000).
K. Velichkova,
K. Krezhov, S. Balabanov,
“On
the DC electrical transport in carbon implanted polymers modified by
gamma irradiation”, Balkan Physics Letters 9,
198-202, (2001).
K. Velichkova,
K. Krezhov, S. Balabanov,
Ch.
Angelov, “Gamma irradiation effects on the DC voltage
current characteristics of carbon implanted polymers”, Proc. 11th
ISCMP, Varna 2000, World Sci. Singapore, J. Marshall,
A. Petrov and D. Nesheva
Ed., 2001, pp. 488-491.
K. Krezhov,
K. Velitchkova, S. Balabanov,
"DC surface transport properties of selenium implanted polymethylmetacrylate,
Vacuum, 69 (1-3), 113-118 (2003).
T. Tsvetkova,
S. Balabanov, E. Skordeva,
S. Kitova, J. Sielanko, D. Maczka, J. Zuk, "Jon
implantation induced surface morphology changes in thin As3Se2
films, Vacuum, 70, 471-475 (2003).
S. Balabanov,
K. Velichkova, K. Krezhov,
“Photoluminescence of carbon-implanted ultra-high molecular weight polyethylene
composite and its modification by gamma irradiation”, Vacuum, 69, 107-112
(2003).
T. Tsvetkova,
S. Balabanov, E. Skordeva,
S. Kitova, J. Sielanko, D. Maczka, J. Zuk, "Surface
morphology effects of post-implantation annealing and thin amorphous films of
the As-Se system", Vacuum, 72, 143-147 (2004).
K. Velichkova,
K. Krezhov, S. Balabanov,
"DC surface transport properties of selenium-implanted PMMA”, Vacuum,
762, 319-323 (2004).
S. Balabanov,
K. Kolentsov,
L. Yourukova, A. Rachkova,
“Optical properties of fullerenes in xylene and polyepoxy oligomer media”, Annuare de L’Universite de Sofia,
Fac. de chemic, 98-99 (2006).
last update January 2007