Ultrafast and Bright Quantum Emitters from the Cavity-Coupled Single Perovskite Nanocrystals.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37943020.
- Also identified by DOI 10.1021/acsnano.3c06760 and PMC identifier 10795470.
- Licence recorded as CC BY-NC-ND.
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Abstract
Perovskite nanocrystals (NCs) have attracted increasing interest in the realization of single-photon emitters owing to their ease of chemical synthesis, wide spectral tunability, fast recombination rate constant, scalability, and high quantum yield. However, the integration of a single perovskite NC into a photonic structure has yet to be accomplished. In this work, the integration of a highly stable individual zwitterionic ligand-based CsPbBr<sub>3</sub> perovskite NC with a circular Bragg grating (CBG) is successfully demonstrated. The far-field radiation pattern of the NC inside the CBG exhibits high directionality toward a low azimuthal angle, which is consistent with the simulation results. A 5.4-fold enhancement in brightness is observed due to an increase in collection efficiency. Moreover, a 1.95-fold increase in the recombination rate constant is achieved. This study offers ultrafast (<100 ps) single-photon emission and an improved brightness of perovskite NCs, which are critical factors for practical quantum optical applications.