{
  "abstract": "Metal halide perovskites have emerged as leading candidates for next-generation optoelectronics, with perovskite solar cells (PSCs) achieving power conversion efficiencies (PCEs) exceeding 26%. However, solution-processed hybrid perovskite films typically suffer from non-radiative recombination and ion migration driven by surface and interfacial defects, limiting device performance, fill factor, and long-term stability. To address these bottlenecks, we report a novel, scalable interface engineering strategy utilizing bromide-rich perovskite nanocrystals to modify 3D perovskite film surfaces via self-driven solid-state halide exchange. The resulting surface-graded heterojunction passivates key iodide vacancies, suppresses ion migration, and optimizes charge extraction. Consequently, modified PSCs demonstrate a ~5% boost in short-circuit current density () and an improved fill factor of 75.3%, driving a ~10% relative increase in PCE from 20.13% (control) to 22.19%. This simple, single-step nanocrystal treatment provides a promising pathway toward robust, scalable, and high-efficiency optoelectronic architectures.",
  "abstract_shown": true,
  "affiliations": [
    "Solid State Structural Chemistry Unit (SSCU",
    "Indian Institute of Science"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Poyoja Rout"
    },
    {
      "name": "Chaya Kerkera"
    },
    {
      "name": "Sarang Mashale"
    },
    {
      "name": "Smruti Ranjan Panda"
    },
    {
      "name": "Laxman Gouda"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Ritika Dey"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Vivek Tiwari"
    },
    {
      "name": "Aditya Sadhanala",
      "orcid": "0000-0003-2832-4894"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d0ey8hhcqg9wp.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15007814/v2",
  "fulltext_url": null,
  "id": "d0ey8hhcqg9wp",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15007814/v2",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7221748108",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15007814/v2",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/d0ey8hhcqg9wp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "10.26434/chemrxiv.15007814",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15007814/v2"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Halide Exchange via Perovskite Nanocrystals for Interfacial Defect Passivation in Solar Cells",
  "title_text": "Halide Exchange via Perovskite Nanocrystals for Interfacial Defect Passivation in Solar Cells",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:24Z",
  "url": "https://research.draconitic.com/paper/d0ey8hhcqg9wp",
  "venue": "ChemRxiv",
  "versions": []
}