Improved sequentially processed Cu(In,Ga)(S,Se)2 by Ag alloying
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2024
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| author | Prot, Aubin JC. M. Melchiorre, Michele Schaaf, Tilly Poeira, Ricardo G. Elanzeery, Hossam Lomuscio, Alberto Oueslati, Souhaib Zelenina, Anastasia Dalibor, Thomas Kusch, Gunnar Hu, Yucheng Oliver, Rachel A. Siebentritt, Susanne |
| author_facet | Prot, Aubin JC. M. Melchiorre, Michele Schaaf, Tilly Poeira, Ricardo G. Elanzeery, Hossam Lomuscio, Alberto Oueslati, Souhaib Zelenina, Anastasia Dalibor, Thomas Kusch, Gunnar Hu, Yucheng Oliver, Rachel A. Siebentritt, Susanne |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_04394 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Improved sequentially processed Cu(In,Ga)(S,Se)2 by Ag alloying Prot, Aubin JC. M. Melchiorre, Michele Schaaf, Tilly Poeira, Ricardo G. Elanzeery, Hossam Lomuscio, Alberto Oueslati, Souhaib Zelenina, Anastasia Dalibor, Thomas Kusch, Gunnar Hu, Yucheng Oliver, Rachel A. Siebentritt, Susanne Materials Science Applied Physics 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. |
| title | Improved sequentially processed Cu(In,Ga)(S,Se)2 by Ag alloying |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2403.04394 |