{
  "abstract": "Interfacial nonradiative recombination limits tin-lead perovskite photovoltaics. Here we show that neutral ethylenediamine chelates undercoordinated metals at tin-rich surfaces, weakens metal-iodide bonds, and removes excess tin, reconstructing the surface towards a stoichiometric tin-to-lead ratio. In contrast, protonated ethylenediammonium iodide initially passivates undercoordinated metal sites before undergoing defect-assisted deprotonation. Atomistic simulations reveal that subsurface iodide vacancies promote iodide migration and lower the energetic cost of deprotonation. Ethylenediamine-induced reconstruction produces stronger n-type surface character, facilitates electron extraction into C60, and suppresses interfacial nonradiative recombination, enabling methylammonium-free solar cells with a power conversion efficiency of 25.86%. Together, these distinct surface reaction pathways and the defect-assisted evolution of the passivating species underscore the importance of understanding perovskite surface chemistry for the rational design of molecular passivation strategies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.34293",
  "author_total": 19,
  "authors": [
    {
      "name": "Lijun Chen"
    },
    {
      "name": "Sitong Zhao"
    },
    {
      "name": "Gaukhar Nigmetova"
    },
    {
      "name": "David Garcia Romero"
    },
    {
      "name": "Matteo Pitaro"
    },
    {
      "name": "Sofia Lerda"
    },
    {
      "name": "Edoardo Mosconi"
    },
    {
      "name": "Michael Aidi"
    },
    {
      "name": "Douwe van Netten"
    },
    {
      "name": "Julia Kraft"
    },
    {
      "name": "Jiaxiong Li"
    },
    {
      "name": "Jacopo Pinna"
    },
    {
      "name": "Asya Serafimova"
    },
    {
      "name": "Antonija Grubišić-Čabo"
    },
    {
      "name": "Loredana Protesescu"
    },
    {
      "name": "Giuseppe Portale"
    },
    {
      "name": "Petra Rudolf"
    },
    {
      "name": "Filippo De Angelis"
    },
    {
      "name": "Maria Antonietta Loi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6mnj5fzee0925.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.34293",
  "fulltext_url": null,
  "id": "6mnj5fzee0925",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.34293",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "physics.app-ph"
    ],
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7223901543",
  "pdf_url": "https://arxiv.org/pdf/2610.34293",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6mnj5fzee0925.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.34293",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.34293"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Controlling Surface Chemistry in Tin-Lead Perovskites for High-Efficiency Solar Cells",
  "title_text": "Controlling Surface Chemistry in Tin-Lead Perovskites for High-Efficiency Solar Cells",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/6mnj5fzee0925",
  "venue": "arXiv",
  "versions": []
}