Highly Efficient Broad-Band Luminescence Involving Organic and Inorganic Molecules in a Zero-Dimensional Hybrid Lead Chloride

Abstract

The photophysical mechanism of ultrabright visible light emission in the zero-dimensional (0D) hybrid organic–inorganic material (HOIM), (DETA)­PbCl5·H2O (DETA = diethylenetriammonium), has been studied. This compound exhibits efficient room-temperature bluish white-light (WL) emission, corroborated by a high photoluminescence quantum yield (PLQY) value of 36.8 % and a Commission Internationale de l’Eclairage (CIE) color coordinates of (0.18, 0.17). Optical investigations reveal that broad-band emission containing multiple emission centers originates from both the fluorescence of the organic molecules DETA and self-trapped excitons within the [Pb2Cl10]6– inorganic bioctahedral dimers. Furthermore, an enhanced PLQY of up to 40.3% with an adjusted pure WL emission (CIE of (0.33, 0.34)) and a remarkable color rendering index of 90 was achieved through the incorporation of Mn2+ within (DETA)­PbCl5·H2O. These findings aid in understanding the photophysical properties of 0D HOIMs and preparation of new families of highly emissive materials for solid-state lighting applications.

Doped Lead Halide White Phosphors for Very High Efficiency and Ultra‐High Color Rendering

“…Generally,o wing to the substitution of Pb 2+ (ionic radii, 1.19 )b ys maller Mn 2+ (ionic radii, 0.67 ), XRD peaks can shift to higher angles. [39] However,f or low concentrations of Mn dopants,t he influence of Mn on the structure is negligible and cannot be observed by X-ray diffraction. [40] To confirm the absence of amorphous phases, solid-state NMR was carried out.…”

Synthesis, crystal structure and Hirshfeld surface of bis(2-aminopyridinium) hexachloridostannate(IV)

“…For example, in these hybrid materials, the organic part can have non-linear optical properties (Bi et al, 2008). Most of the physical properties come from the inorganic part, such as the electronic transport properties, the optical photoluminescence properties (Yangui et al, 2019), or even magnetic properties (Manser et al, 2016). As part of our studies in this area, we now describe the synthesis and structure of the title molecular salt, (I).…”

Zero‐Dimensional Hybrid Cd‐Based Perovskites with Broadband Bluish White‐Light Emissions

“…Previous experimental and theoretical studies demonstrated that lowering the structural dimensionality of hybrid perovskites enables stronger quantum confinement effect, which will effectively result in higher exciton binding energies and enhance the broadband emission intensity . For example, more efficient broadband white light emissions have been achieved in one‐dimensional (1D) C 4 N 2 H 14 PbBr 4 , 1D (TDMP)PbBr 4 :Mn and 0D (DETA)PbCl 5 ⋅ H 2 O with higher quantum yields of 20%, 60% and 40.3%, respectively . Such achievements further promote the exploration of 0D hybrid metal halides as broadband light emitting materials.…”