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Description:

Solution-processed metal halide perovskite nanocrystals (NCs) have emerged as exceptional emitters for next-generation optoelectronics and nanophotonics, owing to their high photoluminescence quantum yields and tunable optical properties. However, coupling these colloidal nanomaterials with complex photonic resonators faces severe limitations, particularly on suspended structures where capillary infiltration disrupts film continuity, fundamentally hindering efficient light-matter interaction. Here, we introduce a graphene-scaffolding strategy that overcomes these limitations, enabling the deterministic fabrication of a continuous, ultrathin (~28 nm) CsPbBr3 NC film on freestanding photonic membranes. The atomically thin graphene interface effectively bridges air holes, preventing nanomaterial infiltration and suppressing scattering losses. This architecture provides an ideal nanophotonic platform to exploit engineered
dual-mode non-hybridizing bound states in the continuum. By aligning orthogonal resonances for field superposition, we achieve giant energy localization and a record-high (~200-fold) photoluminescence enhancement. This work highlights 2D-material scaffolding as a universal interface for integrating solution-processed nanomaterials with advanced nanophotonic
architectures.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Perovskite nanocrystals, Graphene, Membrane, Bound states in the continuum (BIC), Dual-mode resonance, Light-matter interaction, CsPbBr3

Date published: 2026-04-08

Publisher: American Chemical Society (ACS)

Journal:

• Nano Letters (ISSN: 15306984) vol. 26 issue. 13 p. 4439-4448

Funding:

• Ministry of Education, Culture, Sports, Science and Technology JPMXP1225NM5090
• Ministry of Education, Culture, Sports, Science and Technology JPMXS0118067246
• Japan Society for the Promotion of Science JP23K26155
• Japan Society for the Promotion of Science JP25H01614
• Japan Society for the Promotion of Science JP25KF0083
• National Institute for Materials Science
• National Science and Technology Council 113-2124-M-002-007
• National Science and Technology Council 114-2112-M-002-032-MY3
• Ministry of Education, Taiwan 111L900801
• Taiwan Consortium of Emergent Crystalline Materials

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1021/acs.nanolett.6c00330

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Updated at: 2026-04-21 09:41:45 +0900

Published on MDR: 2026-04-21 14:26:22 +0900