{
  "id": 6426573,
  "title": "Bilayer approach ramps performance of all-perovskite triple-junction solar cells",
  "url": "https://urgent.news/2026/09/09/bilayer-approach-ramps-performance-of-all-perovskite-triple-junction",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-09T14:00:50.000Z",
  "source": {
    "name": "Physics World",
    "slug": "physics-world",
    "url": "https://physicsworld.com/a/bilayer-approach-ramps-performance-of-all-perovskite-triple-junction-solar-cells/"
  },
  "original_language": "en",
  "account": "Researchers at Helmholtz-Zentrum Berlin (HZB) have developed an all-perovskite triple-junction solar cell that breaks the efficiency barrier, reaching 27.3%. Triple-junction cells stack three perovskite sub-cells tuned to capture different parts of the solar spectrum, allowing them to surpass the efficiency limits of single-junction cells. However, traditional PEDOT:PSS layers used to extract positive charges from the narrow-band-gap tin-lead sub-cell caused severe optical and electrical losses. To overcome this, HZB researchers introduced a graphene oxide and self-assembled monolayer (SAM) bilayer. This bilayer effectively suppresses losses, providing both high efficiency and stability. By replacing PEDOT:PSS with this bilayer, the efficiency of the narrow-band-gap sub-cell was enhanced, leading to a record-breaking triple-junction efficiency of 27.3%. The chemically stable bilayer interface also demonstrated exceptional longevity, retaining 90% of its initial performance after 770 hours of continuous operation. The researchers project that further optimization could push the efficiency beyond the 30% mark.",
  "summary": "A novel graphene oxide bilayer pushes triple-junction perovskite solar cells to a milestone 27.3% efficiency with unprecedented operational longevity The post Bilayer approach ramps performance of all-perovskite triple-junction solar cells appeared first on Physics World .",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}