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Lomuscio, Alberto
University of Luxembourg
in Cooperation with on an Cooperation-Score of 37%
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Publications (5/5 displayed)
- 2024Improved sequentially processed Cu(In,Ga)(S,Se)2 by Ag alloying
- 2024Improved Sequentially Processed Cu(In,Ga)(S,Se)<sub>2</sub> by Ag Alloying
- 2021Passivating Surface Defects and Reducing Interface Recombination in CuInS<sub>2</sub> Solar Cells by a Facile Solution Treatmentcitations
- 2020Continuous-wave laser annealing of metallic layers for CuInSe2 solar cell applications: effect of preheating treatment on grain growthcitations
- 2020OPTICAL DEFECT SPECTROSCOPY IN CUINS2 THIN FILMS AND SOLAR CELLS
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article
Improved sequentially processed Cu(In,Ga)(S,Se)2 by Ag alloying
Abstract
Alloying small quantities of silver into Cu(In,Ga)Se2 was shown to improve the efficiency for wide and low band gap solar cells. We study low band gap industrial Cu(In,Ga)(S,Se)2 absorbers, substituting less than 10% of the copper with silver, using absolute photoluminescence and cathodoluminescence spectroscopy. Silver improves the grain size and promotes the interdiffusion of Ga and In across the depth of the absorber, resulting in a smoother band gap gradient. However, a certain lateral inhomogeneity is observed near the front and back sides. The non-radiative losses in the bare absorbers are reduced by up to 30 meV.