{
  "abstract": "RbF post-deposition treatments provide an effective way to increase the performances of Cu(In,Ga)Se (CIGSe) solar cells, but the role of heavy alkali elements at the microscopic scale is still unclear. Here, we investigate the impact of an RbF post-deposition treatment under S atmosphere. An increase of the conversion efficiency from 12.4% to 16.3% is enabled by a better collection of charge carriers and a 100 mV increase in Voc. Using high-resolution hyperspectral cathodoluminescence mapping, we show that the RbF(S) treatment passivates low-energy defects attributed to copper vacancies, effectively resulting in an efficient reduction of non-radiative recombination at grain boundaries and in grain interiors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "name": "Thomas Bidaud"
    },
    {
      "name": "Polyxeni Tsoulka"
    },
    {
      "name": "Nicolas Barreau"
    },
    {
      "name": "Stéphane Collin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9rrf66tv3c2b1.bib",
  "cited_by": 2,
  "doi": "10.1016/j.solmat.2026.114390",
  "fulltext_url": null,
  "id": "9rrf66tv3c2b1",
  "issns": [
    "0927-0248",
    "1879-3398"
  ],
  "landing_url": "https://hal.science/hal-05685956v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "1.chim.mate"
    ],
    [
      "openalex",
      "2208|Chalcogenide Semiconductor Thin Films"
    ]
  ],
  "openalex": "W7155174296",
  "pdf_url": "https://hal.science/hal-05685956/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-15",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/9rrf66tv3c2b1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:51Z",
      "native_id": "hal-05685956",
      "source": "hal",
      "url": "https://hal.science/hal-05685956v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.mate",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Imaging defect passivation in grain interiors and grain boundaries of RbF(S)-treated Cu(In,Ga)Se2 solar cells by cathodoluminescence",
  "title_text": "Imaging defect passivation in grain interiors and grain boundaries of RbF(S)-treated Cu(In,Ga)Se2 solar cells by cathodoluminescence",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:51Z",
  "url": "https://research.draconitic.com/paper/9rrf66tv3c2b1",
  "venue": "Solar Energy Materials and Solar Cells",
  "versions": []
}