Organic‐Inorganic Hybrid Low‐dimensional Lead Iodides with Broadband Yellow to Red Light Emissions

Abstract

By using the same saturated organic cations as structural templates, we synthesized and characterized a series of organicinorganic 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.

Using chiral ammonium cations to modulate the structure of 1D hybrid lead bromide perovskites for linearly polarized broadband light emission at room temperature

“…The Correlated Color Temperatures (CCT) were determined as 2238 K, 2620 K and 2404 K for the BuA -, MBA - and EBA compounds, respectively. Broadband emission at such low energy spectral range has recently been reported for other 1D perovskite compounds 44,45 as well as for 0D metal halides 46 and 0D mixed halide perovskites 47 and is considered highly interesting for applications in light-emitting devices. 44,47…”

“…Broadband emission at such low energy spectral range has recently been reported for other 1D perovskite compounds 44,45 as well as for 0D metal halides 46 and 0D mixed halide perovskites 47 and is considered highly interesting for applications in light-emitting devices. 44,47…”