Multicomponent Organic Metal Halide Hybrid with White Emissions

Abstract

Zero‐dimensional (0D) organic metal halide hybrids, in which organic and metal halide ions cocrystallize to form neutral species, are a promising platform for the development of multifunctional crystalline materials. Herein we report the design, synthesis, and characterization of a ternary 0D organic metal halide hybrid, (HMTA)4PbMn0.69Sn0.31Br8, in which the organic cation N‐benzylhexamethylenetetrammonium (HMTA+, C13H19N4+) cocrystallizes with PbBr42−, MnBr42−, and SnBr42−. The wide band gap of the organic cation and distinct optical characteristics of the three metal bromide anions enabled the single‐crystalline “host–guest” system to exhibit emissions from multiple “guest” metal halide species simultaneously. The combination of these emissions led to near‐perfect white emission with a photoluminescence quantum efficiency of around 73 %. Owing to distinct excitations of the three metal halide species, warm‐ to cool‐white emissions could be generated by controlling the excitation wavelength.

Indium-antimony-halide single crystals for high-efficiency white-light emission and anti-counterfeiting

“…Three-dimensional (3D) organic-inorganic lead halide perovskites have gained tremendous attention due to their unique optical and electronic properties, such as high absorption coefficiency, easily tunable bandgaps, high charge carrier mobility, and exceptional defect tolerance, which further enable their successful implementation in solar cells, photodetectors, and light-emitting diodes (LEDs) ( 1 – 12 ). Very recently, low-dimensional lead halide perovskites have emerged as single-phase white-emitting materials due to their intriguing broadband emission behavior, which has been highlighted with excellent color stability and can efficiently avert self-absorption issues faced by the currently commercial multicomponent-based white-light sources ( 13 – 20 ).…”

Rare Earth‐Free Luminescent Materials for WLEDs: Recent Progress and Perspectives

“…This combination can achieve near‐perfect white light emission with CIE coordinates of (0.32, 0.33), CRI of 95, and PLQY of up to 73%. [ 91 ] Yang et al prepared a series of phenethylamine cationic hybrid 2D perovskites, (C 6 H 5 C 2 H 4 NH 3 ) 2 PbBr X Cl 4− X . It was determined that the quantum yield of this perovskite increased from 0.2% to 16.9%, and its luminescence transitioned from warm to cool white light with increasing Br content.…”

Recent Advances in Luminescent Zero‐Dimensional Organic Metal Halide Hybrids

“…[ 41 ] In another case, three distinct metal halide ions, that is, PbBr 4 2− , MnBr 4 2− , and SnBr 4 2− , are incorporated into a single crystalline 0D hybrid ((HMTA) 4 PbMn 0.69 Sn 0.31 Br 8 ) to display high‐quality white emissions. [ 42 ] The major milestones of the research progress in 0D OMHHs are highlighted in Figure .…”

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