2D hybrid lead iodide perovskites are a class of light-harvesting semiconductors with a vast compositional space. This talk will discuss the photophysical characterization of three new homologous series of (100) lead iodide perovskites: (AA)2MAn-1PbnI3n+1 (n=3-4), [(AA)x(IPA)1-x]2MAn-1PbnI3n+1 and (IPA)2MAn-1PbnI3n+1 (n=1-4), as well as their perovskite-related substructures, which incorporate the bifunctional organic molecules of allylammonium (AA) and iodopropylammonium (IPA). The spacing between [PbI6] layers influences their electronic properties and excited-state dynamics, which we investigated by transient absorption microscopy (TAM). A long-lived (~100 ps) trap state ensemble with spectrally broad emission is probably related to the lattice distortions induced by the incorporation of the IPA cations.

Energy cascades in photoexcited multilayer (100) lead iodide perovskites

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.