Molecular dimensionality and photoluminescence of hybrid metal halides

Hybrid metal halides, as a class of emerging luminescent materials, have received considerable attention for optoelectronic applications and beyond. The molecular dimensionality of hybrid metal halides is affected significantly by the organic ligands, leading to versatile energy-level structures and tunable photoluminescence (PL) behaviors. In this review, we summarize the structural characteristics of the different organic ligands in hybrid metal halides and especially focus on the establishment of structure–property relationships between organic ligand structures and luminescent properties in 0D hybrid metal halides. Finally, current research pursuits, challenges, and possible solutions are discussed for future studies.