{
  "abstract": "Practical implementation of two‐dimensional (2D) transition‐metal dichalcogenides (TMDCs) in novel optoelectronics requires a fundamental understanding of carrier dynamics and interfacial states at 2D/3D heterostructures. Herein, a mixed‐dimensional p‐n junction based on monolayer tungsten disulfide (WS2) and cuprous oxide (Cu2O) is investigated. An anomalous emission (AE) at 1.66 eV is identified at room temperature, which is in the same spectral range as oxygen‐related Cu2O defect luminescence, but is enhanced at the heterointerface under 457 nm excitation. While this sub‐bandgap feature resembles the spectral signature of an interlayer exciton (ILX), its combined excitation‐wavelength, power, temperature, and bias dependence suggests that the emission is predominantly defect‐mediated and modified by the WS2/Cu2O interface. External modulation of the AE intensity is demonstrated via vertical bias, yielding an approximately 45% maximum‐to‐minimum modulation of the normalized AE/Cu2O PL area ratio over the applied bias range from −2 V to +2 V at 93 K. This modulation is asymmetric, showing a correlation between AE quenching and photocurrent generation under reverse bias. The spectral response peaks near the open‐circuit condition, marking a regime of efficient carrier accumulation and interfacial trapping. These findings identify WS2/Cu2O as a model hybrid interface for probing electrically tunable defect‐mediated recombination in mixed‐dimensional heterostructures.",
  "abstract_shown": true,
  "affiliations": [
    "Faculty of Physics and CENIDE University of Duisburg‐Essen Duisburg Germany",
    "Mechanical Engineering University of Waterloo Waterloo Canada",
    "Interdisciplinary Center for the Analytics on the Nanoscale (ICAN) and CENIDE University of Duisburg‐Essen Duisburg Germany"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 12,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Osamah Kharsah",
      "orcid": "0000-0001-8737-6227"
    },
    {
      "affs": [
        0
      ],
      "name": "Jonah von Kuczkowski"
    },
    {
      "affs": [
        1
      ],
      "name": "Ahmed Shahin",
      "orcid": "0000-0003-0415-7278"
    },
    {
      "affs": [
        0
      ],
      "name": "Rouaa Albalkhi",
      "orcid": "0009-0001-9451-7275"
    },
    {
      "affs": [
        0
      ],
      "name": "Aya Al‐Amwi"
    },
    {
      "affs": [
        0
      ],
      "name": "Ibrahim Titi",
      "orcid": "0009-0009-8138-9671"
    },
    {
      "affs": [
        0
      ],
      "name": "Yossarian Liebsch",
      "orcid": "0000-0002-7943-2089"
    },
    {
      "affs": [
        0
      ],
      "name": "Oliver Altenhoff"
    },
    {
      "affs": [
        2
      ],
      "name": "Ulrich Hagemann",
      "orcid": "0000-0002-1880-6550"
    },
    {
      "affs": [
        0
      ],
      "name": "Anke Hierzenberger"
    },
    {
      "affs": [
        1
      ],
      "name": "Kevin Musselman",
      "orcid": "0000-0002-9752-0015"
    },
    {
      "affs": [
        0
      ],
      "name": "Marika Schleberger",
      "orcid": "0000-0002-5785-1186"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dvfh97y17v01d.bib",
  "cited_by": 0,
  "doi": "10.1002/smll.75662",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13742907/",
  "id": "dvfh97y17v01d",
  "issns": [
    "1613-6810",
    "1613-6829"
  ],
  "landing_url": "https://doi.org/10.1002/smll.75662",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Research Article"
    ],
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7213866220",
  "pdf_url": "https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/smll.75662",
  "pmcid": "PMC13742907",
  "pmid": "42766378",
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dvfh97y17v01d.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T12:23:39Z",
      "native_id": "PMC13742907",
      "source": "pmc",
      "url": "https://doi.org/10.1002/smll.75662"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|2D Materials and Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Anomalous Sub‐Band Gap Emission at Room Temperature in Mixed‐Dimensional WS2/Cu2O Heterostructures",
  "title_text": "Anomalous Sub‐Band Gap Emission at Room Temperature in Mixed‐Dimensional WS2/Cu2O Heterostructures",
  "type": "peer-reviewed",
  "updated_at": "2026-11-10T12:23:39Z",
  "url": "https://research.draconitic.com/paper/dvfh97y17v01d",
  "venue": "Small (Weinheim an Der Bergstrasse, Germany)",
  "versions": []
}