Role of Metal-Chloride Anions in Photoluminescence Regulations for Hybrid Metal Halides.

Organic-inorganic hybrid metal halides with emissive organic cations are of great interest due to their structural diversity and interesting photophysical properties. Here, we assemble emissive organic cations (EnrofloH) with different metal-chloride anions (PbCl to BiCl to SnCl) to form the new single crystal phases, and thus the photoluminescence properties of the metal halides, including Stokes shift, full width at half-maximum (FWHM), and photoluminescence quantum yield (PLQY) have been studied accordingly. (EnrofloH)SnCl·HO, as an example, possesses narrow FWHM and high PLQY, which are caused by the strong π-π stacking and inter- and intramolecular hydrogen bonds interactions.

Realizing Tunable White Light Emission in Lead-Free Indium(III) Bromine Hybrid Single Crystals through Antimony(III) Cation Doping.

Low-dimensional metal halide hybrids (OIMHs) have recently been explored as single-component white-light emitters for use in solid-state lighting. However, it still remains challenging to realize tunable white-light emission in lead-free zero-dimensional (0D) hybrid system. Here, a combination strategy has been proposed through doping Sb enabling and balancing multiple emission centers toward the multiband warm white light.

Synthesis, Crystal Structure and Green Luminescence in Zero-Dimensional Tin Halide (CHN)SnBr.

Organic-inorganic hybrid metal halides with broad-band emission are currently receiving an increasing interest for their unique light emission properties. Here we report a novel lead-free zero-dimensional (0D) tin halide, (CHN)SnBr, in which isolated [SnBr] octahedrons are cocrystallized with organic cations, 1,3-bis(aminomethyl)benzene (CHN). Upon photoexcitation, the bulk crystals exhibit broad-band green emission peaking at 507 nm with a full width at half-maximum (fwhm) of 82 nm (0.

Two Covalent Ultraviolet Nonlinear Optical Crystals.

Nonlinear optical (NLO) crystals are the vital components of laser science and technology, as they can convert lasers in common wavelengths into new wavelength bands for ultraviolet (UV), IR, and even terahertz laser output. Known UV NLO crystals mainly focus on crystals containing cations, but covalent crystals have rarely been reported. Here we report two covalent NLO crystals, B O I and B O II.

Lead-Free Tin(IV)-Based Organic-Inorganic Metal Halide Hybrids with Excellent Stability and Blue-Broadband Emission.

Lead-free zero-dimensional (0D) organic-inorganic metal halide hybrids have recently attracted special attention as luminescent materials. However, their structural stability is still a challenge for the further development. Here, we select Sn as the B-site inorganic cation and obtain a new tin(IV)-based organic-inorganic metal halide hybrids (CNHCl)SnCl with remarkable air stability.

An unprecedented planar π-conjugated [BP] group with ultra-large birefringence and nonlinearity: an ab initio study.

Searching for new nonlinear optical active (NLO-active) units would greatly promote the development of NLO materials. Herein, we theoretically investigate a newly reported [BP] group which consisted of two corner-sharing [BP] trigonal planar units. Attributed to the coplanar π-conjugated configuration and the unique connection mode, the [BP] group can achieve both the largest birefringence (Δn∼ 0.

KNaBPO: A Deep-Ultraviolet Transparent Borophosphate Exhibiting Second-Harmonic Generation Response.

A new deep-ultraviolet transparent alkali metal borophosphate KNaBPO is synthesized by high-temperature flux method, and its properties were characterized by a combination of experimental and methods. This compound crystallizes in the noncentrosymmetric 2 space group and its framework is formed of one-dimensional infinite [BPO] chains consisting of apex-sharing [BO] and [PO] tetrahedra. KNaBPO had a short ultraviolet edge (<190 nm) and exhibited a moderate powder second-harmonic generation signal (0.

Lone-Pair Enhanced Birefringence in an Alkaline-Earth Metal Tin(II) Phosphate BaSn (PO ).

The first alkaline-earth metal tin(II) phosphate, BaSn (PO ) , has been discovered, which consists of layered structures constructed from strictly alternating [SnO ] and [PO ] moieties. This compound is expected to have a large birefringence with Δn≈0.071 at 1064 nm, owing to the presence of stereochemically active lone pair metal cations.

NaBOF: a new sodium-rich fluorooxoborate with a unique [BOF] ring and a short ultraviolet absorption edge.

A new sodium-rich fluorooxoborate Na3B7O11F2 features a novel large [B14O24F4] ring formed by two corner-shared [B7O13F2] groups, each containing two [B3O7] anionic units linked by a [BO2F2] group. The band gap of the title compound calculated by using first-principles calculations is 7.69 eV (∼161 nm) and the birefringence refractive index is 0.