Organic-inorganic hybrid low-dimensional lead iodides with broadband yellow to red light emissions

By using the same saturated organic cations as structural templates, we synthesized and characterized a series of organic-inorganic hybrid lead iodides with different structural types, namely as, 1D [(Me)${}_4$-Pipz]Pb${}_2$I${}_6$ (1), 1D [(Me)${}_4$-Pipz]PbI${}_4$ (2) and 2D [(Me)${}_4$-Pipz]${}_2$Pb${}_5$I${}_{14}$ (3), in different organic solutions. Remarkably, these hybrid lead iodides display tunable broadband light emissions from yellow (578 nm) to red (680 nm) spectral range, which can be ascribed to self-trapped excitons based on systematic spectroscopy characterizations. This work affords one structural design strategy to realize tunable structural skeletons and broadband low-energy photoluminescence emissions in hybrid lead iodides. (© 2022 Wiley‐VCH GmbH)