Visualizing Spatiotemporal Dynamics in Semiconductor Nanomaterials [Invited]

Semiconductor nanomaterials – including quantum dots, nanoplatelets, and 2D materials – are promising components of next-generation energy conversion technologies. However, the structural, energetic, and compositional heterogeneity of these systems can lead to misleading interpretation of ensemble data. I will describe efforts in my lab over the past few years to adapt time-resolved spectroscopy techniques for use within an optical microscope. Specifically, I will discuss the use of time-resolved photoluminescence microscopy to visualize charge carrier transport in hybrid perovskites and 0D-2D heterostructures, and the development of a new second-order nonlinear optical imaging technique called phase-modulated degenerate parametric amplification (DPA) microscopy.