Stepwise Crystalline Structural Transformation in 0D Hybrid Antimony Halides with Triplet Turn-on and Color-Adjustable Luminescence Switching

Abstract

Intelligent stimuli-responsive fluorescence materials are extremely pivotal for fabricating luminescent turn-on switching in solid-state photonic integration technology, but it remains a challenging objective for typical 3-dimensional (3D) perovskite nanocrystals. Herein, by fine-tuning the accumulation modes of metal halide components to dynamically control the carrier characteristics, a novel triple-mode photoluminescence (PL) switching was realized in 0D metal halide through stepwise single-crystal to single-crystal (SC-SC) transformation. Specifically, a family of 0D hybrid antimony halides was designed to exhibit three distinct types of PL performance including nonluminescent [Ph 3 EtP] 2 Sb 2 Cl 8 ( 1 ), yellow-emissive [Ph 3 EtP] 2 SbCl 5 ·EtOH ( 2 ), and red-emissive [Ph 3 EtP] 2 SbCl 5 ( 3 ). Upon stimulus of ethanol, 1 was successfully converted to 2 through SC-SC transformation with enhanced PL quantum yield from ~0% to 91.50% acting as “turn-on” luminescent switching. Meanwhile, reversible SC-SC and luminescence transformation between 2 and 3 can be also achieved in the ethanol impregnation–heating process as luminescence vapochromism switching. As a consequence, a new triple-model turn-on and color-adjustable luminescent switching of off–on I –on II was realized in 0D hybrid halides. Simultaneously, wide advanced applications were also achieved in anti-counterfeiting, information security, and optical logic gates. This novel photon engineering strategy is expected to deepen the understanding of dynamic PL switching mechanism and guide development of new smart luminescence materials in cutting-edge optical switchable device.

Zero-Dimensional Hybrid Antimony Chloride with Near-Unity Broad-Band Orange-Red Emission toward Solid-State Lighting

“…Figure b shows the calculated PDOS values of (CTP) 2 SbCl 5 . As can be seen, the valence band maximum (VBM) is consisting of Cl 3p orbital and the antibonding states of Sb 5s and 5p, whereas the conduction band minimum (CBM) includes Cl 3p and the antibonding states of Sb 5p, which also agree with the other 0D hybrid antimony halides . Both the VBM and CBM are quite localized because of the isolated character of the [SbCl 5 ] 2– square pyramids, which are desired for driving the formation of STEs.…”

Temperature-Induced Reversible Photoluminescence Switching and Ultraviolet-Pumped Light-Emitting Diode Applications of a Perovskite (C6H10N2)2MnCl6·2H2O Crystal

“…Organic–inorganic hybrid metal halide perovskites with excellent optoelectronic properties and promising applications in many aspects, such as lasers, solar cells, photodetectors, and light-emitting diodes, have attracted widespread attention. − Benefiting from 6s 2 lone-pair electronic configuration, lead halides usually present excellent optoelectronic properties, and a series of Pb-based perovskites with excellent characteristics have been exploited. , However, the inherent toxicity of heavy metal lead to human health and the environment cannot be ignored; hence, the development of lead-free hybrid perovskites has received increasing attention. − In addition, from the aspect of spatial structure, organic–inorganic hybrid perovskites can demonstrate three-dimensional (3D), two-dimensional (2D), one-dimensional (1D), and zero-dimensional (0D) structures by adopting suitable organic and metal halide constituents. − Among them, low-dimensional hybrid materials usually show unique photophysical performances (e.g., broad luminescence, large Stokes shift, and high efficiency) due to high quantum confinement . Specifically, the reduction of dimensionality leads excitons to be confined in inorganic polyhedron and consequently facilitates the formation of self-trapping excitons (STEs). , Furthermore, the PLQY is inclined to increase with the reduction of dimensionality.…”

Lanthanum-Centered Organotin Oxysulfide Clusters with Substitutable Coordinating Amide Solvent Molecules for Tuning Blue Light Emission

“…In a coordination complex, compared to the host skeleton, the coordinated or cocrystallized small organic molecule could produce a great impact on its physicochemical nature, but that is often ignored. − For metal–organic framework materials, there have been many studies on the host–guest interactions for performance regulation, especially for photoluminescence (PL). − Being a molecular complex, heterometallic or organometallic oxychalcogenido metalate clusters are beneficial to PL-relevant quantitative calculations and to the exploration of the relationships between the PL properties of the clusters and the coordination small organic molecules. − However, the research focused on the isolated oxychalcogenido metalate clusters with improved PL efficiencies by the structural regulation of coordination species is more scarce.…”