ArticleACS nano2025
Collective Interactions of Quantum-Confined Excitons in Halide Perovskite Nanocrystal Superlattices.
Article in ACS nano, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Deterministic Nucleation of Nanocrystal Superlattices on 2D Perovskites for Light-Funneling Heterostructures.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Cooperative and collective quantum light emission from perovskite superball superstructures.Science advances · 2026Article
- Quantum beats of exciton-polarons in CsPbINature communications · 2026Article
- Cryo-optical setup for wide-field microscopy and spectroscopy of luminescent nanomaterials.Nanoscale · 2026Article
- Room-Temperature Collective Quantum Emission Mediated by Wannier-Mott Excitons in CsPbBrSmall science · 2025Article
- Polarized Superradiance from CsPbBrNano letters · 2025Article
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Authors and funding
12 authors.
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Abstract
Collective optical properties can emerge from an ordered ensemble of emitters due to interactions between the individual units. Superlattices of halide perovskite nanocrystals exhibit collective light emission, influenced by dipole-dipole interactions between simultaneously excited nanocrystals. This coupling changes both the emission energy and rate compared to the emission of uncoupled nanocrystals. We demonstrate how quantum confinement governs the nature of the coupling between the nanocrystals in the ensemble. The extent of confinement is modified by controlling the nanocrystal size or by compositional control over the Bohr radius. In superlattices made of weakly confined nanocrystals, the collective emission is red-shifted with a faster emission rate, showing the key characteristics of superfluorescence. In contrast, the collective emission of stronger quantum-confined nanocrystals is blue-shifted with a slower emission rate. Both types of collective emission exhibit correlative multiphoton emission bursts, showing distinct photon bunching emission statistics. The quantum confinement changes the preferred alignment of transition dipoles within the nanocrystal and switches the relative dipole orientation between neighbors, resulting in opposite collective optical behaviors. Our results extend these collective effects to relatively high temperatures and provide a better understanding of exciton interactions and collective emission phenomena at the solid state.
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