Perspective: multi-dimensional coherent spectroscopy of perovskite nanocrystals

Recently, colloidal perovskite nanocrystals (PNCs) have emerged as an exciting material platform for optoelectronic applications due to their combination of facile synthesis routes, quantum size effects, and exceptional optical properties among other favorable characteristics. Given the focus on their optoelectronic properties, spectroscopic characterization of PNCs is crucial to rational design of their structure and device implementation. In this Perspective, we discuss how multi-dimensional coherent spectroscopy (MDCS) can resolve exciton dynamics and circumvent inhomogeneous broadening to reveal underlying homogeneous spectral lineshapes. We highlight recent applications of MDCS to PNCs in the literature, and suggest compelling problems concerning their microscopic physics to be addressed by MDCS in the future.

Automated summary

Colloidal perovskite nanocrystals (PNCs) have great potential for optoelectronic applications. Spectroscopic characterization is crucial for understanding their structure and device implementation. Multi-dimensional coherent spectroscopy (MDCS) can resolve exciton dynamics and reveal homogeneous spectral lineshapes, providing new possibilities for their application.