In this work, we study the growth of Sb2Se3 deposited by thermal evaporation on different buffer layers for superstrate configuration thin film solar cells. A comparison between CdS which has been widely used as a buffer layer and CdSe is represented. Selenium vacancies in Sb2Se3 thin film act as recombination centers, and according to the literatures, applying an excessive amount of Se improve the application of solar cell. By using CdSe as a buffer layer, selenium could diffuse into the film and it is supposed to increase the efficiency. In our case both devices show the same efficiency of around 3.5% and higher Jsc for CdSe device. Also, morphology results indicate slightly higher crystal quality for CdSe/Sb2Se3 thin film and the solar cells perform almost the same degradation results.
COMPARISON OF CDS AND CDSE BUFFER LAYERS FOR ANTIMONY SELENIDE (SB2SE3) SOLAR CELLS BY VACUUM EVAPORATION
Torabi N.;Zanetti S.;Artegiani E.;Piccinelli F.;Punathil P.;Romeo A
2022-01-01
Abstract
In this work, we study the growth of Sb2Se3 deposited by thermal evaporation on different buffer layers for superstrate configuration thin film solar cells. A comparison between CdS which has been widely used as a buffer layer and CdSe is represented. Selenium vacancies in Sb2Se3 thin film act as recombination centers, and according to the literatures, applying an excessive amount of Se improve the application of solar cell. By using CdSe as a buffer layer, selenium could diffuse into the film and it is supposed to increase the efficiency. In our case both devices show the same efficiency of around 3.5% and higher Jsc for CdSe device. Also, morphology results indicate slightly higher crystal quality for CdSe/Sb2Se3 thin film and the solar cells perform almost the same degradation results.
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