Browsing by Author "Simaşchevici, Alexei"

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    Obţinerea structurilor n+SnO2/nSi şi cercetarea proprietăţilor acestora [Articol]
    (CEP USM, 2007) Bobeico, Eugenia; Bruc, Leonid; Caraman, Mihail; Coval, Andrei; Fedorov, Vladimir; Simaşchevici, Alexei; Şerban, Dormidont; Usatîi, Iurie
    By the method of pyrolitic spraying spirit solutions of chlorides of tin and antimony transparent (transmission ~ 85%) and conductive (σ ~ 102 Ohm-1cm-1) layers of SnO2:Sb were obtained. By using these layers izotype SIS structures In/n+SnO2 :Sb/SiO2/nSi/Cu are produced. Their electrophysical properties are studied. The energy diagram of heterostructure n+SnO2:Sb/nSi is constructed and the mechanism of current transition is determined.
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    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.
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    Studiul proprietăţilor electrice şi fotovoltaice ale structurilor ITO-SI în baza siliciului multicristalin [Articol]
    (CEP USM, 2009) Simaşchevici, Alexei; Şerban, Dormidont; Bruc, Leonid; Gorceac, Leonid; Coval, Andrei; Fedorov, Vladimir; Usatîi, Iurie
    ITO-polycrystalline p-type silicon structures with surface barriers are obtained by pyrolytical spraying of indium andtin chloride solutions and their electrical and photoelectrical properties are studied. The spectral sensibility range, current transport mechanisms and the parameters of the heterostructure under forward and reverse bias are determined. It isshown the possibility of using these heterojunctions in solar radiation conversion.