2. Articole

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

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Author: search.filters.author.Potlog, TamaraSubject: search.filters.subject.solar cells

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    Synthesis and electrophysical properties of CdS/ZnTe heterojunctions [Articol]
    (Academia de Ştiinţe a Moldovei, 2022) Lungu, Ion; Gagara, Lyudmila; Ghimpu, Lidia; Potlog, Tamara
    In this paper results of studying CdS/ZnTe heterostructures synthesized by the quasi- closed space sublimation method on glass substrates coated with an ITO layer are described. The electrical and photoelectric properties of the structures are studied using current–voltage and capacitance–voltage characteristics in a temperature range of 30–100 °C. Analysis of the experimental data shows that the main specific feature of CdS/ZnTe structures is the formation of a high-resistance transition layer, which affects the separation of carriers at the barrier contact. The current carrier concentration in the space charge region, which is determined from the capacitance–voltage characteristics, is 1  1015 cm3; this fact suggests that one of the contacting materials—ZnTe—exhibits a high resistivity. Measurements of current–voltage characteristics in the solar cell mode give the following photoelectric parameters: open circuit voltage (UOC = 0.53 V, JSC = 27–30 A/cm2, and FF = 0.25.
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    Studiul interacţiunilor de schimb de la interfeţele celulelor solare CdS/CdTe [Articol]
    (CEP USM, 2014) Duca, Dumitru; Potlog, Tamara
    În această lucrare este studiată influenţa interfeţelor din celulele fotovoltaice SnO2/CdS/CdTe şi SnO2/TiO2/CdS/CdTe asupra parametrilor fotovoltaici ai dispozitivelor respective. A fost determinată starea chimică a elementelor prezente şi compuşii de la interfeţe. S-a constatat că factorul ce micşorează în special densitatea curentului de scurtcircuit în celula solară SnO 2/TiO2/CdS/CdTe este TiS2, care pentru un singur strat de atomi are o bandă interzisă de 1,0 eV. Prin urmare, la interfaţa TiO2/TiS2 se formează o barieră de potenţial care duce la micşorarea concentraţiei purtătorilor de sarcinăşi, respectiv, la micşorarea eficienţei deconversie a energiei solare în energie electrică