ZnO/CdS/CuGaSe2 solar cells – absorber and device properties

For solar cells based on CuGaSe2 (CGSe) polycrystalline thin films, a novel chemical close-spaced vapor transport technique is used to deposit CGSe absorber. Film characterisation including X-ray diffraction measurements, scanning electron microscopy observations, X-ray fluorescence and elastic r...

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Autor principal: Rusu, Marin
Formato: article
Lenguaje:EN
Publicado: D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2006
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Acceso en línea:https://doaj.org/article/2609d2fbfecd4e86bbb27db180cf9087
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Sumario:For solar cells based on CuGaSe2 (CGSe) polycrystalline thin films, a novel chemical close-spaced vapor transport technique is used to deposit CGSe absorber. Film characterisation including X-ray diffraction measurements, scanning electron microscopy observations, X-ray fluorescence and elastic recoil detection analysis has been carried out. Optical measurements were performed to monitor the changes in the CGSe band gap as a function of composition. These results are used for a discussion of the behaviour of the ZnO/CdS/CuGaSe2 solar cell photovoltaic parameters as well as of the current transport. For the first time, a thermally activated Shockley-Read-Hall recombination mechanism is observed for the CGSe- based solar cells in a large temperature region.