{
  "abstract": "Solution-phase synthesis of monolayer hybrid organic-inorganic perovskites is constrained by rapid out-of-plane crystal growth, uncontrolled nucleation, and strong interlayer aggregation, yielding flakes of only a few μm. We introduce a steric-engineering ternary-solvent growth strategy to synthesize monolayer and few-layer A2MX4 hybrid perovskites with exceptionally large surface areas. By combining alcohol cosolvents with an amine additive, out-of-plane stacking is suppressed. Using (PEA)2CuCl4 as a model system, monolayers with lateral areas exceeding 1000 μm2 are achieved, representing a massive dimensional increase over conventional methods. Molecular dynamics and quantum-chemical calculations show that longer-chain alcohols reorganize precursor solvation, while solvent volatility prolongs edge-mediated precursor transport during annealing. This strategy demonstrates universal applicability across diverse organic spacer cations (PEA+, F-PEA+, PentA+), metal centers (Cu2+, Mn2+, Pb2+), and halides (Cl-, Br-, I-). The large lateral dimensions enable direct, solvent-free electrical contact fabrication via physical shadow masking, bypassing chemical degradation from solvents used in conventional lithography. Planar devices fabricated from isolated ultrathin (PEA)2PbI4 channels exhibit ultra-low dark currents down to the 10^-15 - 10^-13 A range, enabling femtowatt-to-picowatt static power consumption, ~ 0.2 pW at 5 V, a 250-fold reduction relative to drop-cast films, while maintaining a high light-to-dark current ratio of 4.3 x 102. This work establishes precise steric and solvation control as a paradigm for scalable, compositionally diverse, low-static-power monolayer 2D perovskite optoelectronics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.30764",
  "author_total": 5,
  "authors": [
    {
      "name": "Shankeerthan Kalyanasundaram"
    },
    {
      "name": "Swarit Dwivedi"
    },
    {
      "name": "Sanje Mahasivam"
    },
    {
      "name": "Christopher R. McNeill"
    },
    {
      "name": "Sudha Mokkapati"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2bp7vt2gmpqdh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.30764",
  "fulltext_url": null,
  "id": "2bp7vt2gmpqdh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.30764",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7223383416",
  "pdf_url": "https://arxiv.org/pdf/2610.30764",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2bp7vt2gmpqdh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2610.30764",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.30764"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Universal Synthesis of Large-Area Hybrid Perovskite Monolayers Enabling Lithography-Free, Low-Static-Power Optoelectronics",
  "title_text": "Universal Synthesis of Large-Area Hybrid Perovskite Monolayers Enabling Lithography-Free, Low-Static-Power Optoelectronics",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/2bp7vt2gmpqdh",
  "venue": "arXiv",
  "versions": []
}