How to measure the photoexcitation dynamics processes of solid substances on the microscopic level? This is a popular topic in many basic and applied sciences. Organic crystal is one out of a multitude material, and how to comprehend its intrinsic property at the microscopic level is the focus of this discussion. Microscopic time-resolved spectroscopy can study the morphology dependent photoexcitation dynamics and energy spatial transport processes in organic crystals. In this tutorial review, we introduce the principles and methods of microscopic time-resolved photoluminescence techniques and microscopic transient absorption techniques that are currently or potentially used to study organic crystals in nanometer and micrometer scale. Meanwhile, the research status of organic crystals via microscopic time-resolved spectroscopy is discussed by giving some examples. Then we compare the advantages and disadvantages of different methods in detail, which opens up ideas for improving the performance of the instrument.

文章链接：https://pubs.rsc.org/en/Content/ArticleLanding/2024/CP/D4CP04875J