Lead-free zero dimensional tellurium(iv) chloride-organic hybrid with strong room temperature emission as a luminescent material

Abstract

Despite the current progress in ‘Pb-free’ low dimensional main group metal halide based luminescent materials, it has remained challenging to synthesize Te(IV) halide hybrids with strong ambient emission with excitation...

Low Dimensional, Broadband, Luminescent Organic‐Inorganic Hybrid Materials for Lighting Applications

“…However, the reported Te(IV) based 0D hybrids are non‐emissive at room temperature [29,53] and those that do emit at room temperature are very weak with low PLQYs [52b,c,54] . In a first effort, we demonstrated Tellurium (IV) chloride based 0D hybrid featuring highly regular (undistorted) [TeCl 6 ] 2− octahedral units dispersed in benzyltriethylammonium ligand matrix that show intrinsic, broad, yellow‐orange, strong room temperature emission (PLQY∼15 %) with excellent environmental stability as shown in Figure 6f [55] . Noteworthy, such ambient emitting octahedral (exclusive geometry) [TeX 6 ] 2− hybrids could further be leveraged to gain rational understanding on structure/distortion – photophysical property correlation.…”

“…[52b,c,54] In a first effort, we demonstrated Tellurium (IV) chloride based 0D hybrid featuring highly regular (undistorted) [TeCl 6 ] 2À octahedral units dispersed in benzyltriethylammonium ligand matrix that show intrinsic, broad, yellow-orange, strong room temperature emission (PLQY ~15 %) with excellent environmental stability as shown in Figure 6f. [55] Noteworthy, such ambient emitting octahedral (exclusive geometry) [TeX 6 ] 2À hybrids could further be leveraged to gain rational understanding on structure/distortion -photophysical property correlation. Unlike majority of the reported 0D hybrids that are excitable through ultraviolet illumination, such Te-based 0D hybrid demonstrate excitation features in the visible range allowing for their use as potential downconversion phosphor materials when excited with blue light.…”

Selective Luminescence Response of a Zero-Dimensional Hybrid Antimony(III) Halide to Solvent Molecules: Size-Effect and Supramolecular Interactions

“…Metal halides, especially metal halide perovskites, have attracted enormous attention for their superior opto/electronic performance. − Among them, zero-dimensional (0D) organic–inorganic metal halides (OIMHs) show distinctive advantages in the rich combination of components. − By designing the inorganic and organic components of OIMH crystal, dimensionally reduced crystallographic/electronic structures would exhibit quantum confinement effect that can lead to different optical properties from the bulk. − For example, 0D OIMHs based on n s 2 ions (mainly Pb 2+ , Sn 2+ , Sb 3+ , Bi 3+ , Te 4+ ) can exhibit self-trapped excitons (STEs) photoluminescence (PL) due to soft lattice and strong electron–phonon coupling, emitting photons with broad emission, large Stokes shift and high efficiency. − Therefore, 0D OIMHs have been developed in flourishing optical applications such as X-ray scintillator, thermography, and optical waveguides. − More importantly, weak intermolecular/ionic interactions might endow 0D OIMHs with switchable structure and PL. − ,− …”

Toward Eco‐Friendly Lead‐Free Low‐Dimensional Perovskites

“…[41][42][43] From 1D to 0D, 0D perovskites are capable of wider chemical space, such as Sn 2þ , Ge 2þ , of the fourth main group elements, Bi 3þ , Sb 3þ of the fifth main group elements, Se 4þ , Te 4þ of the sixth main group elements and Zn 2þ , Mn 2þ of the subgroup elements. [42,44] We classify the common elements in LFLDPs and summarize the metal ions at site B according to the dimensions, as shown in the Figure 2c. In general, the selectivity of B-site ions in LDPs is very widespread, including alkaline-earth metals, transition metals, post-transition metals, metalloids, lanthanide, and actinide elements, leading to more various structures and properties.…”