Achieving Multicolor Emitting of Antimony-Doped Indium-Based Halide Perovskite via Monovalent Metal Induced Phase Engineering

Lead-free Perovskite with Distorted [InX6]3– Octahedron Induced by Organic Cation and Enhanced PLQY by Sb Doping

“…The two compounds have strong absorption bands with cutoff wavelengths of 260 and 280 nm, respectively, with band gaps of 4.97 and 4.85 eV, respectively (Figure c,d), indicating that they are wide-band gap semiconductor materials. The absorption peak near the edge is excitonic absorption, which is common in In-based 0D halides. ,, When the organic amine cation changes from MP to EP, the absorption wavelength has a significant red shift, and the band gap slightly decreases, indicating that the organic amine cation can affect the optical band gap. As shown in Figure b, 3 and 4 belong to the bromide family and also exhibit differences in their UV–visible absorption spectra.…”

“…Although In-based perovskite materials have emerged as superior emitters, generally, their PLQY are not always high because photoluminescence of low-dimensional halides is mainly due to self-trapped excitons (STEs) emission instead of intrinsic emission of components. − Although STEs emission can bring excellent broadband photoluminescence properties, the price is that its intensity is extremely dependent on crystal structure, , which makes its emission intensity unstable. An effective strategy to deal with this effect is to use Sb doping because the 3 P 1 → 1 S 0 transition from Sb 3+ can produce efficient photoluminescence and reduce the effect of parity forbidden transition of In 3+ . − By the way, in further efforts to optimize the optoelectronic properties of these materials, halogen substitution is a widely used strategy to adjust the luminescent characteristics of different metal halides. Recent research has also confirmed the impact of halogens on the optical properties of hybrid metal halides, where different capture and release energies from different halogens will significantly affect the emission of STEs. , …”

Inorganic Salt Solution Assisted Grinding Synthesis of Stimuli-Responsive Perovskites for Reversible Information Encryption and Decryption Based on I Ching 64 Hexagrams

“…Thanks to the electronic configuration of Sb 3+ ions in the ns 2 configuration, two distinct absorption peaks are displayed in the 300–400 nm ( 1 S 0 – 1 P 1 , 1 S 0 – 3 P 1 ) range and an additional peak at 295 nm ( 1 S 0 – 3 P 2 ), indicative of the dynamic Jahn–Teller distortion in the excited state . For Cs 2 KIn 1– x Sb x Cl 6 , the Jahn–Teller distortion arises from the substitution of Sb 3+ for In 3+ , forming [SbCl 6 ] 3– octahedra. , However, in Cs 2 In 1– x Sb x Cl 5 ·H 2 O, the octahedra exist in the form of [SbCl 5 ·H 2 O] 2– and [InCl 5 ·H 2 O] 2– ; this is equivalent to one H 2 O replacing one Cl – in the regular octahedron [InCl 6 ] 3– , which leads to the destruction of symmetry and more drastic Jahn–Teller distortion. , This can be utilized to explain why Cs 2 In 1– x Sb x Cl 5 ·H 2 O exhibits a stronger 295 nm excitation intensity and a larger Stokes shift compared to Cs 2 KIn 1– x Sb x Cl 6 …”

“…Additionally, employing a hydrochloric acid assistant, Yang et al reported a powder-to-powder approach . Similarly, Zhao et al reported the synthesis of Cs 2 MInCl 6 (M = Ag + , K + , Na + ), also through a HCl-assisted Cs 2 InCl 5 ·H 2 O:Sb 3+ solution coprecipitation method, providing us a significant inspiration. Nonetheless, the above works cannot completely solve the problem of long synthesis time or strong-acid participation.…”

Evolution of fractal patterns in lead-free zero-dimensional perovskite Cs2InBr5(H2O)

“…15–21 Many synthesis routes have been proposed for 0D halide perovskites, including single-crystal growth, thin films, microcrystals, and nanoparticles. 22–24 The solution route presents a versatile method, enabling the precise control of size and shape. 25,26 The solution synthesis facilitates the regulation of the structures and optical properties of 0D halide perovskites, leading to enhanced device performance.…”