Ternary zero-dimensional hybrid metal halides with dual emission

Bulk assemblies of zero-dimensional (0D) metal halides with ‘host-guest’ system provide a promising platform for rationally structural tunability and photoluminescence modulation. In this work, we first report a series of ternary 0D metal halides, (bmpy) 9 [Pb 3 Cl 11 ](MnCl 4 ) 2-2 x (SbCl 5 ) 2 x (bmpy +  = 1-buty-1-methylpyrrolidinium + , C 9 NH 20 + ), where the organic cation bmpy + cocrystallizes with [Pb 3 Cl 11 ] 5- trimer clusters, [MnCl 4 ] 2− tetrahedra, and [SbCl 5 ] 2− pyramids. The emission color of (bmpy) 9 [Pb 3 Cl 11 ](MnCl 4 ) 2-2 x (SbCl 5 ) 2 x can be easily tuned from green to warm white and finally to orange-red by controlling the excitation wavelength or the [SbCl 5 ] 2− /[MnCl 4 ] 2− molar ratio, promising its potential for application in multicolor light-emitting devices or even in encrypting multilevel optical codes. This work presents a novel structural modulation strategy to fabricate superior ordered single-crystalline multicomponent materials with multifunctionalities of 0D luminescent metal halides.