{
  "abstract": "AgBiS2 has rapidly risen in efficiency as single-junction photovoltaics (PVs), but its potential for tandem PVs is unexplored. Herein, we perform optical modeling based on the experimental absorption spectrum of AgBiS2, revealing that, as the NIR sub-cell, efficiencies exceeding 47.9% are achievable in triple-junction tandems, superseding tandems using Pb/Sn perovskite NIR cells (35.9%). However, fulfilling this potential requires overcoming the limited transport properties of AgBiS2 nanocrystal films, which constrains film thicknesses to only 30-50 nm, severely restricting NIR response. A solution-phase ligand exchange process is herein developed, allowing one-step deposition of passivated AgBiS2 nanocrystals that maintain efficient charge-carrier extraction despite an order of magnitude increase in film thickness. These films enable 24.0%-efficient four-terminal tandems with visible-light-absorbing lead-halide perovskite sub-cells, and monolithic tandems successfully demonstrating voltage addition. AgBiS2 PVs have high stability, retaining >90% of the original efficiency after 3 months of storage in dry air without encapsulation. This work establishes the significant potential of AgBiS2 as a stable and scalable NIR absorber for tandem PVs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.01797",
  "author_total": 25,
  "authors": [
    {
      "name": "Shiling Dong"
    },
    {
      "name": "Yongjie Wang"
    },
    {
      "name": "Hae-Jun Seok"
    },
    {
      "name": "Mengyuan Huang"
    },
    {
      "name": "Edward Newton"
    },
    {
      "name": "Der Ying Chen"
    },
    {
      "name": "Yixin Wang"
    },
    {
      "name": "Xiaoyu Guo"
    },
    {
      "name": "Keisuke Takemoto"
    },
    {
      "name": "Dusan Ivanovic"
    },
    {
      "name": "Avari Roy"
    },
    {
      "name": "Yongge Yang"
    },
    {
      "name": "Grey Christoforo"
    },
    {
      "name": "Rebekah Fraser"
    },
    {
      "name": "Seongrok Seo"
    },
    {
      "name": "John O'Sullivan"
    },
    {
      "name": "Ha Kyung Park"
    },
    {
      "name": "Jack M. Woolley"
    },
    {
      "name": "Ji-Seon Kim"
    },
    {
      "name": "Ruy S. Bonilla"
    },
    {
      "name": "Henry J. Snaith"
    },
    {
      "name": "Qing Shen"
    },
    {
      "name": "Aditya Sadhanala"
    },
    {
      "name": "Lydia H. Wong"
    },
    {
      "name": "Robert L. Z. Hoye"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5p7jmryycqa72.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.01797",
  "fulltext_url": null,
  "id": "5p7jmryycqa72",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.01797",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2611.01797",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5p7jmryycqa72.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.01797",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.01797"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Stable AgBiS2 near-infrared absorbers for thin film tandem photovoltaics",
  "title_text": "Stable AgBiS2 near-infrared absorbers for thin film tandem photovoltaics",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/5p7jmryycqa72",
  "venue": "arXiv",
  "versions": []
}