Multicomponent Organic Metal Halide Hybrid with White Emissions.

: Multicomponent single crystals have received great research attention for their capability of realizing multifunctionalities in a single phase material. Zero-dimensional (0D) organic metal halide hybrids are an emerging class of ionically bonded crystalline materials, in which organic and metal halide ions co-crystallize to form neutral species. The rich choices of organic and metal halide components make 0D organic metal halide hybrids a highly promising platform for the development of multifunctional crystalline materials, which however are very much unexplored to date. Here we report the design, synthesis, and characterization of a ternary 0D organic metal halide hybrid, (HMTA) 4 PbMn 0.69 Sn 0.31 Br 8 , in which an organic cation HMTA + (HMTA + : N-benzyl hexamethylenetetramium, C 13 H 19 N 4 + ) co-crystallizes with multiple metal halide anions, i.e. PbBr 4 2- , MnBr 4 2- , and SnBr 4 2- . The wide bandgap of the organic cation and distinct optical characteristics of three metal bromide anions enable a single crystalline "host-guest" system to exhibit emissions from multiple "guest" metal halide species simultaneously. The combination of these emissions could lead to a near-perfect white emission, with Commission Internationale d'Eclairage (CIE) of (0.32, 0.33), Color Rendering Index (CRI) of 95, and photoluminescence quantum efficiency (PLQE) of around 73%. Due to distinct excitations of three metal halide species, warm to cool white emissions with Correlated Colour Temperature (CCT) varying from 3237 K to 12730 K could be realized by controlling the excitation wavelength.