{
  "id": "2404.06190",
  "version": "v1",
  "published": "2024-04-09T10:22:13.000Z",
  "updated": "2024-04-09T10:22:13.000Z",
  "title": "Transport resistance strikes back: unveiling its impact on fill factor losses in organic solar cells",
  "authors": [
    "Maria Saladina",
    "Carsten Deibel"
  ],
  "comment": "9 pages, 5 figures",
  "categories": [
    "cond-mat.mtrl-sci",
    "physics.app-ph"
  ],
  "abstract": "The fill factor ($FF$) is a critical parameter for solar cell efficiency, yet its analytical description is challenging due to the interplay between recombination and charge extraction processes. An often overlooked yet significant factor contributing to $FF$ losses, beyond recombination, is the influence of charge transport. In most state-of-the-art organic solar cells, the primary limitation of the $FF$ arises not from recombination but rather from low conductivity, highlighting the need for refined models to predict the $FF$ accurately. Here, we extend the analytical model for transport resistance to a more general case. Drawing from a large set of experimental current-voltage and light intensity-dependent open-circuit voltage data, we systematically incorporate crucial details previously omitted in the model. Consequently, we introduce a straightforward set of equations to predict the $FF$ of a solar cell, enabling the differentiation of losses attributed to recombination and transport resistance. Our study provides valuable insights into strategies for mitigating $FF$ losses based on the experimentally validated analytical model, guiding the development of more efficient solar cell designs and optimization strategies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-04-09T10:22:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "organic solar cells",
      "transport resistance strikes",
      "factor losses",
      "light intensity-dependent open-circuit voltage data",
      "recombination"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}