{
  "abstract": "Non-radiative recombination at the perovskite/hole transport layer (HTL) interface fundamentally constrains the open-circuit voltage (Voc) and charge-collection efficiency of planar perovskite solar cells. In this work, we report an effective interface engineering strategy of incorporating MAPb (IxBr1-x)3 nanocrystals (NC) into a Spiro-OMeTAD matrix which is used as HTL. Consequently, planar n-i-p devices incorporating the composite HTL deliver an enhanced power conversion efficiency of 20.31 %, highlighted by a surge in 𝑉𝑜𝑐 (up to 1.1 V) alongside stable photocurrent density of 24.62 mA cm −2 . Electrochemical impedance spectroscopy (EIS) reveals that NC incorporation results in reduced bulk resistance of the Spiro-OMeTAD layer. Furthermore, systematic analysis of the characteristic time constant extracted from EIS measurements provides evidence of halide-ion redistribution which modulate the interfacial energetics and enhance the built-in electric field, thereby contributing to the observed improvement in PCE. This work highlights the potential of nanocrystal-engineered HTLs as an effective approach for potential suppression of interfacial recombination and developing defectpassivated, high-voltage perovskite solar cells.",
  "abstract_shown": true,
  "affiliations": [
    "Centre for Nano Science and Engineering (CeNSE",
    "Indian Institute of Science (IISc"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Poyoja Rout"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Deepika Jangid"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Sarang Mashale"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Chaya Karkera"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Avari Roy"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Laxman Gouda"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Aditya Sadhanala",
      "orcid": "0000-0003-2832-4894"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7cx25bbfgtycm.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15008059/v1",
  "fulltext_url": null,
  "id": "7cx25bbfgtycm",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008059/v1",
  "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": "W7204845113",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15008059/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-31",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/7cx25bbfgtycm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
      "native_id": "10.26434/chemrxiv.15008059",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008059/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Synergistic Energetic Realignment and Interfacial Passivation via Perovskite Nanocrystal-Doped Spiro-OMeTAD for Efficient Planar Perovskite Solar Cells",
  "title_text": "Synergistic Energetic Realignment and Interfacial Passivation via Perovskite Nanocrystal-Doped Spiro-OMeTAD for Efficient Planar Perovskite Solar Cells",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:17Z",
  "url": "https://research.draconitic.com/paper/7cx25bbfgtycm",
  "venue": "ChemRxiv",
  "versions": []
}