Environment-assisted quantum transport of excitons in perovskite nanocrystal superlattices
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s41467-024-55812-8.pdf
Description
Published version
Size
1.63 MB
Format
Adobe PDF
Checksum (MD5)
8ad1789fad7bbb545d810ea79ce62bc9
Author(s)
Blach, Daria D
Lumsargis-Roth, Victoria A
Chuang, Chern
Clark, Daniel E
Deng, Shibin
Williams, Olivia F
Li, Christina W
Cao, Jianshu
Huang, Libai
Date Issued
February 2, 2025
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Blach, D.D., Lumsargis-Roth, V.A., Chuang, C. et al. Environment-assisted quantum transport of excitons in perovskite nanocrystal superlattices. Nat Commun 16, 1270 (2025).
Version
Final published version
Abstract
Transport of energy carriers in solid-state materials is determined by their wavefunctions and interactions with the environment. While quantum transport theory has predicted distinct transport in the intermediate coupling regime resulting from the intricate interplay between coherent wave-like and incoherent particle-like mechanisms, these predictions are awaiting experimental evidence. Here we demonstrate quantum transport signatures in perovskite nanocrystal superlattices by imaging exciton propagation with high spatial and temporal resolutions over 7-298 K. At 7 K, coherent propagation of the excitons dominates, with transient ballistic motion within a coherence length of up to 40 nanocrystal sites. The interference of the wave-like motion leads to Anderson Localization in the long-time limit. As temperature increases, a peak in the long-time diffusion constant is observed at a temperature where static disorder and dephasing are balanced, which substantiates evidence for environment-assisted quantum transport. Our results connect theoretical predictions and experiments using a stochastic Anderson localization model, highlighting perovskite nanocrystals as promising building blocks for quantum materials.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution-NonCommercial-NoDerivatives
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DOI of Published Version
10.1038/s41467-024-55812-8
