Scientific description: The aim of this experimental project is to use a pump-probe optical microcopy method to spatiotemporally study microscopic charge and thermal transport and relaxation dynamics in nanocrystal- based optoelectronics systems. Energy carrier transport at the nanoscale is fundamental to energy conversion applications. While advanced spectroscopic methods grant an understanding of excited-state dynamics in isolated materials, many physical questions about the microscopic nature of transport in optoelectronics devices remain underexplored. To address this area, one needs a probe of local charge transport with sub-nanosecond time resolution and sub-micron spatial resolution in a material in realistic device conditions. Our approach is to do ultrafast microscopy and fabricate nanocrystal-based optoelectronics. These studies will reveal microscopic structure–property relationships that connect nanoscale carrier dynamics to macro-scale energy conversion. During the timeframe of the master’s internship, the student will perform state-of-the-art experiments on nanocrystal optoelectronics, and perform analysis and modeling of nanoscale energy transport. The goal is that the student continues on to do a PhD, during which the student will spatiotemporally measure the microscopic charge and thermal transport characteristics to resolve fundamental problems in colloidal semiconductor nanocrystal systems and advanced energy conversion devices.