Unlocking High Efficiency in (Ag,Cu)(In,Ga)Se₂ Solar Cells: A Parametric Study on Silver Alloying
The partial substitution of copper (Cu) with silver (Ag) in Cu(In,Ga)Se₂ (CIGS) thin-film solar cells represents a transformative approach to improving absorber layer properties and boosting device efficiency. This study will examine and discuss the effect of Ag alloying (0 < Ag/(Ag+Cu) < 0.3) via thermal evaporation, combined with rubidium fluoride (RbF) post-deposition treatment, on samples with bandgaps ranging from 1.1 to 1.5 eV. The approach significantly affects gallium grading, grain size, open-circuit voltage (V<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">oc</inf>), and fill factor (FF), achieving a power conversion efficiency (PCE) up to 20.4% for a ACIGS absorber with a 1.2 eV bandgap.
Authors
- Vincent Dufoulon
- Thomas Tom (ORCID: https://orcid.org/0000-0001-8436-6728)
- Amelle Rebaï (ORCID: https://orcid.org/0009-0006-4822-1349)
- Jackson Lontchi (ORCID: https://orcid.org/0000-0002-6155-5945)
- Jean‐François Guillemoles (ORCID: https://orcid.org/0000-0003-0114-8624)
- Stéfania Cacovich (ORCID: https://orcid.org/0000-0002-6402-4816)
- Negar Naghavi
- Tommaso Raimondi
Institutions
- Centre National de la Recherche Scientifique (FR)
- École Polytechnique (FR)
Publication Details
- Published
- 2025-06-08
- DOI
- https://doi.org/10.1109/pvsc59419.2025.11133167
- Citations
- 1
- Primary Topic
- Chalcogenide Semiconductor Thin Films
- Type
- article
- Field-Weighted Citation Impact
- 0.73