Lower panel: Demonstration of the linear relation between the initial slope of the QY-length plot and defect density (dashed line is a linear plot with slope of unity).
Scientific Achievement
Observation and interpretation of the size scaling of optical properties in low dimensional halide perovskites.
Significance and Impact
Scaling laws are a powerful tool disentangling the carrier dynamics of microscopic systems in a quantitative and interpretable manner.
Research Details
- Developed a model system consisting of chemically tunable, highly luminescent halide perovskite nanocrystals to illustrate the role of carrier diffusion and material dimensionality on the carrier recombination kinetics and luminescence efficiency.
- This study brings to light the dimensionality as a hidden constraint on carrier dynamics and identifies the diffusion length as an important parameter that distinguishes nanoscale and macroscale carrier behaviors.
