Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.084
Publication date: 7th February 2022
Efficient transport of excited state energy in nanocrystal thin-films is essential in the operation of light harvesting and light emitting devices. Transient Photoluminescence Microscopy has emerged as a powerful tool to characterize energy transport, allowing for a direct visualization of the transport in both space and time.[1]
In this talk, I will present past and current work of our use of Transient Photoluminescence Microscopy in characterizing energy transport in different nanocrystal solids.[2,3] I will specifically highlight the role of energetic disorder in these materials, which greatly impacts the transport characteristics. For example, size-polydispersity in colloidal quantum-dot solids leads to inhomogeneous energy landscapes that cause disitinct non-equilibrium effects in the transport of energy carriers. Similarly, statistical fluctuations in the doping levels of perovskite nanocrystals casue local variations in the energy landscape. Using Transient Photoluminescence Microscopy, we provide a direct visualization of the impact of disorder on the transport characteristics in these materials, and allow us to start formulating desing-rules for optimized energy landscapes.
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