ArticleACS nano2023
Confinement and Exciton Binding Energy Effects on Hot Carrier Cooling in Lead Halide Perovskite Nanomaterials.
Article in ACS nano, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Giant anomalous exciton-multiphoton nonlinearities in layered hybrid perovskites.Light, science & applications · 2026Article
- Next-generation CsPbBrRSC advances · 2026Review
- Defect Passivation Strategies in Halide Perovskite Solar Cells and LEDs.ACS energy letters · 2026Review
- In situ and real-time ultrafast spectroscopy of photoinduced reactions in perovskite nanomaterials.Nature communications · 2025Article
- Mechanism of Hot-Carrier Photoluminescence in Sn-Based Perovskites.Advanced materials (Deerfield Beach, Fla.) · 2025Article
- Ultrafast Carrier and Lattice Cooling in TiNano letters · 2024Article
- Extending the defect tolerance of halide perovskite nanocrystals to hot carrier cooling dynamics.Nature communications · 2024Article
- Spectator Exciton Effects in Nanocrystals III: Unveiling the Stimulated Emission Cross Section in Quantum Confined CsPbBrJournal of the American Chemical Society · 2024Article
- Operando dynamics of trapped carriers in perovskite solar cells observed via infrared optical activation spectroscopy.Nature communications · 2023Article
- Alloying metal cations in perovskite nanocrystals is a new route to controlling hot carrier cooling.Light, science & applications · 2023Article
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Authors and funding
18 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The relaxation of the above-gap ("hot") carriers in lead halide perovskites (LHPs) is important for applications in photovoltaics and offers insights into carrier-carrier and carrier-phonon interactions. However, the role of quantum confinement in the hot carrier dynamics of nanosystems is still disputed. Here, we devise a single approach, ultrafast pump-push-probe spectroscopy, to study carrier cooling in six different size-controlled LHP nanomaterials. In cuboidal nanocrystals, we observe only a weak size effect on the cooling dynamics. In contrast, two-dimensional systems show suppression of the hot phonon bottleneck effect common in bulk perovskites. The proposed kinetic model describes the intrinsic and density-dependent cooling times accurately in all studied perovskite systems using only carrier-carrier, carrier-phonon, and excitonic coupling constants. This highlights the impact of exciton formation on carrier cooling and promotes dimensional confinement as a tool for engineering carrier-phonon and carrier-carrier interactions in LHP optoelectronic materials.
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