2. Articole

Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/47

Browse

Filters

2005 - 20072

Settings

Author: search.filters.author.Bruk, Leonid

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Parametrii celulelor solare nITO/pInP obţinute prin metoda pulverizării pirolitice în dependenţă de tratarea lor termică în hidrogen [Articol]
    (CEP USM, 2007) Simaşchevici, Alexei; Şerban, Dormidont; Gorceac, Leonid; Bruk, Leonid; Coval, Andrei; Usatîi, Iurie; Fedorov, Vladimir
    The main objective of this communication is the investigation of the influence of thermal treatment in H2on the parameters of In/nITO/P2O5/pInP/Ag:Zn solar cells obtained by ITO layers pyrolithic pulverization. The ITO/pInP heterostructures obtaining take place at the temperature of 450ºC. The photoelectric parameters of the solar cell received on InP wafers with concentration p = 3·1017cm-3after the thermal treatment are Voc=0.626 V, Isc = 22.72 mA/cm2, FF = 71%, Eff =10.09%. As a result of these investigations it was shown that the thermal treatment of In/nITO/pInP/Ag:ZnSC in H2at 350oC during 10 min. leads to considerable improvement of their photoelectric parameters.
  • Thumbnail Image
    Item
    Influence of defect composition on optical activity of Mn2+ ions in ZnS crystals [Articol]
    (2005) Korotkov, Vitalii; Sobolevskaya, Raisa; Bruk, Leonid; Sushkevich, Constantin; Ketrush, Petru; Dubrovin, A.
    The Mn Zn2+ ion intracentred luminescence in ZnS crystal (max=590nm, FWHM=160-210meV) and its relation to the native, impurity (the background and aluminum) defects formed at the crystal annealing in the bismuth melt at 950oC during 100hrs was studied. The luminescence of the aluminum doped and undoped ZnS single crystals , before and after annealing, were studied. The aluminum presence on the one hand creates sensitizing centers (the radiation bands close to 400nm and 450nm) and on the other hand makes difficult Mn doping of the crystal. It is supposed that the temperature influence on the Mn Zn2+ ion is determined by the position of the electron and hole Fermi cuazi-levels relative to the deep levels, acting as recombination radiative and noneradiative centers the nature of which is determined by the type of crystal lattice defects. The relation between blue centers of recombinative radiation and Mn bands was shown