Publications by authors named "Narumi Nagaya Wong"
Article Synopsis
- The transport of excitons in CsPbBr perovskite nanocrystals (NCs) is influenced by the history of exciton occupancy in those NCs.
- Transient photoluminescence microscopy reveals that the apparent diffusivity of excitons increases with excitation laser power, which is not due to typical exciton interactions or thermal effects.
- The study suggests that previously occupied NCs enter a long-lived state that enhances exciton transport, leading to high diffusivity rates and potentially informing the development of better optoelectronic devices.
Transient microscopy has emerged as a powerful tool for imaging the diffusion of excitons and free charge carriers in optoelectronic materials. In many excitonic materials, extraction of diffusion coefficients can be simplified because of the linear relationship between signal intensity and local excited state population. However, in materials where transport is dominated by free charge carriers, extracting diffusivities accurately from multidimensional data is complicated by the nonlinear dependence of the measured signal on the local charge carrier density.
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