2. Articole
Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/47
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Item The intermediate CdO layer influence on solar energy conversion in CdS/CdTe heterojunctions [Articol](CEP USM, 2020) Qassem, Amjad-Al; Gagara, Ludmila; Fedorov, Vladimir; Potlog, TamaraItem The investigation of TCO/CdS/CdTe heterojunctions by C-U and C-f measurements: Experiment and modeling [Articol](IEEE, 2013) Rotaru, Corneliu; Vatavu, Sergiu; Fedorov, Vladimir; Gașin, Petru; Lux-Steiner, Martha; Ferekides, Chris; Rusu, MarinThe paper presents the analysis of C-U and C-f data obtained in the 1 kHz-10 MHz range for CdS/CdTe heterojunctions prepared by CSS onto (ZnO:Al, ZnO:Al/i-ZnO)/Glass substrates. An attempt to model the physical properties of the heterojunctions is made. A small signal analysis has been carried out to establish the equivalent circuit of device. The unusual capacitance behavior of the ZnO based heterojunction is attributed to presence of the barrier at the back contact.Item 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, IurieBy 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.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, VladimirThe 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.Item 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, IurieITO-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.Item Influența grosimii stratului de Cd1-xMnxTe asupra parametrilor fotovoltaici ai heterojoncţiunii CdS/Cd1-xMnxTe [Articol](CEP USM, 2017) Suman, Victor; Fedorov, Vladimir; Rusnac, DumitruHeterojoncțiunile CdS/Cd1-xMnxTe au fost obținute aplicând metoda de volum cvasiînchis. La studierea proprietăților electrice și fotoelectrice ale acestor structuri s-a constatat că fotosensibilitatea a crescut esențial datorită tratării termice în clorură de cadmiu, iar eficiența celulei solare (CS) este de 10,29%. Aceasta se datorează micșorării recombinării purtătorilor de sarcină la suprafață și particularităților proprietăților electrice și fotoelectrce ale acestor structuri.