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.