[(4AMTP)PbBr]PbBr: a Nontypical Cation-Coordinated Perovskite Showing Deep-Blue Emissions and Blue-Light Photoelectric Response.

Metal-halide perovskites have been extensively investigated due to their fascinating structural diversity and outstanding optoelectronic properties. We report the photoluminescence and photoelectric response behavior of a nontypical Dion-Jacobson perovskite [(4AMTP)PbBr]PbBr (4AMTP = 4-aminomethyltetrahydropyran cation), featuring neutral PbBr layers incorporated into the cationic layers between the anionic [PbBr] layers. A 4AMTP-coordinated PbBr unit constitutes the unique nontypical dication layer.

Structural Descriptors to Correlate Pb Ion Displacement and Broadband Emission in 2D Halide Perovskites.

2D hybrid lead halide perovskites exhibit versatile photoluminescent behaviors for narrowband to broadband emissions (BBEs) and have become attractive candidates for potential applications such as solid-state lighting. Establishing the relationship between the perovskite structural distortion and BBE is key but challenging in designing and optimizing the perovskite luminophores. Conventional attention is given to analyzing the intra-octahedron distortion of the [PbX] (X = halide) unit that has not yet provided a clear structure-luminescence relationship.

-Isomeric Cation Tuning Photoluminescence and Photodetection in 2D Perovskites.

Cationic components in the organic-inorganic hybrid perovskites (OIHPs) play an important role in the arrangement and tilting of the inorganic part that is responsible for semiconducting, luminescent, and photoelectronic properties. Herein, we report two 2D OIHP compounds, (-4ACHO)(HOBr)PbBr () and (-4ACHO)(HOCl)PbBr () (4ACHO = 4-aminocyclohexanol), showing both photoluminescence (PL) and photodetection (PD) that are tuned by the - and configurational isomerism of 4ACHO. Crystals of and exhibit similar packing structures but with different crystallographic symmetries.