Zobrazeno 1 - 10
of 31
pro vyhledávání: '"E. Tzvetkova"'
Autor:
Ayodhya N. Tiwari, M. Kaelin, N. Stratieva, E. Tzvetkova, M. Ganchev, Sergei Bereznev, J. Kois, Olga Volobujeva
Publikováno v:
Thin Solid Films. 516:5948-5952
Cu–In–Ga (CIG) layers of graded composition have been grown by one-step electrodeposition from thiocyanate complex electrolytes. The Ga-content is adjusted from two to 30 at.% by changing stirring rate, deposition time and solution composition. T
Publikováno v:
Radiation Physics and Chemistry. 75:1069-1074
X-, K- and Q-band EPR studies on lyophilized whole pulp parts of blue plum, apricot, peach, melon as well as achens and pulp separately of strawberry before and after X–ray irradiation are reported. Before irradiation all samples show in X band a w
Publikováno v:
Materials Science and Engineering: B. 119:232-239
The transition metal oxides exhibit electrochromism, defined as color change caused by applied voltage. The electrochromic (EC) effect can be stronger in mixed oxides because of the higher optical absorption, due to electron transitions between two k
Autor:
Tatyana Ivanova, M. Ganchev, Kostadinka Gesheva, E. Tzvetkova, Miroslav Abrashev, G. Popkirov, Frank Hamelmann
Publikováno v:
Vacuum. 76:195-198
Thin films of MoO 3 –WO 3 were deposited by chemical vapor deposition. Raman and Auger Spectroscopies were used to characterize bonds configuration and depth profile of the chemical composition of the films. The transparency of MoO 3 –WO 3 films
Publikováno v:
Radiation Physics and Chemistry. 78:823-825
The results from the EPR studies on fresh, air-dried and lyophilized tomato samples before and after gamma-irradiation are reported. Before irradiation fresh and air-dried tomatoes exhibit one singlet EPR line characterized with common g -factor of 2
Autor:
J. Kois, M. Kaelin, Ayodhya N. Tiwari, Sergei Bereznev, N. Stratieva, M. Ganchev, Olga Volobujeva, E. Tzvetkova
Publikováno v:
Thin Solid Films. :325-327
The Cu–In–Ga layers with various Ga-content were produced from one bath by electrodeposition on molybdenum substrates. The use of complex thiocyanate electrolyte allows for a remarkable shift of the deposition potential of elemental copper to the
Publikováno v:
Scopus-Elsevier
Thin CuInSe 2 films were prepared by one-step electrodeposition process. The deposition was done in potentiostatic regime from an original electrolyte containing Cu + , In 3+ , Se 4+ ions and thiocyanate as a complexing agent. The influence of deposi
Publikováno v:
Journal of Materials Science: Materials in Electronics. 14:847-848
Thin films of ZnSe were obtained by chemical bath deposition from a solution containing ZnCl2, hydrazine (NH2)2H2O, NH3, and Na2SSeO3. The influence of the concentration of the components and of the temperature on the growth rate was studied. A hypot
Publikováno v:
Journal of Materials Science: Materials in Electronics. 14:755-756
Thin films of molybdenum oxide, tungsten oxide, and mixed Mo-W oxide were prepared by atmospheric-pressure chemical vapor deposition. For all films, the technological conditions were kept constant. Mixed oxides are expected to exhibit superior electr
Publikováno v:
Scopus-Elsevier
CuInSe2 thin layers have been obtained from a thiocyanate electrolyte with a complexing agent. The as-deposited layers have been polycrystalline with very small crystallites. The influence of the deposition potential on the composition, on the absorp
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