Antimony doped tin(iv) hybrid metal halides with high-efficiency tunable emission, WLED and information encryption

Abstract

Although single-component white light emitting perovskites have emerged as a new star material with great potential in solid-state lighting, the synthesis of lead-free halide perovskites with high efficiency and high...

Precise Manipulation the Efficient Multi‐Exciton Emission with High Thermal Stability in Hybrid Manganese‐Antimony Chloride for Optical Thermometry, Anti‐Counterfeiting, and Information Encryption

“…In metal halides, Sb 3+ ions with active 5s 2 lone pairs are typically present in a 5-coordinated form, and there are also some that exist in 6-coordination. [38] The above experimental results further confirm this observation. Subsequently, we replaced [MnCl 4 ] 2− with [SbCl 5 ] 2and calculated the density of states (DOS) and projected molecular orbitals for the original (C 19 H 18 P) 2 MnCl 4 and (C 19 H 18 P) 2 MnCl 4 :6%Sb, respectively (Figure 4).…”

“…[37] In addition, two Raman peaks at 185 and 443 cm −1 appeared in the Raman spectra of (C 19 H 18 P) 2 MnCl 4 and (C 19 H 18 P) 2 MnCl 4 :6%Sb. These two peaks are the second-order (91 * 2) and fourth-order (111 * 4) Raman modes of the 91 cm −1 peak, respectively, [7,38] indicating the strong electron-phonon coupling. These provide additional evidence for the STE formations with such multiple phonon modes.…”

Realizing efficient emission and triple‐mode photoluminescence switching in air‐stable tin(IV)‐based metal halides via antimony doping and rational structural modulation

“…[14] In parallel, the binding energies centered at 539.1 and 531.5 eV can be observed in the high-resolution XPS spectra of Sb 3d, corresponding to the Sb 3+ 3d 3/2 and 3d 5/2 , respectively. [31,32] The PXRD of Sb 3+ -doped samples were also measured, and similar PXRD patterns with the pristine one were witnessed, which suggests the phase purity of the Sb 3+ -doped compounds (Figure S8). Moreover, the diffraction peak of Sb 3+ -doped Sn(IV)based compounds shifts to a low angle in the enlarged view of PXRD, which should be caused by the lattice expansion due to the ion radius of Sb 3+ (r = 0.76 Å, CN = 6) is larger than Sn 4+ (r = 0.69 Å, CN = 6).…”

Revealing the Structure–Luminescence Relationship in Robust Sn(IV)-Based Metal Halides by Sb3+ Doping

“…As shown in Figure d, with the reduction of temperature, PL intensity at 750 nm gradually increases due to the suppression of nonradiative recombination . What’s more, as the temperature decreases, the PL intensity at 550 nm increases first and then decreases (λ ex = 300 nm) suggesting the emission is assisted with phonons, thus leading to strong exciton–phonon coupling (Figure e) . (C 6 H 16 N 2 )­SbCl 5 were further synthesized for comparison to unveil the origins of the emissions at 550 and 750 nm.…”

“…33 What's more, as the temperature decreases, the PL intensity at 550 nm increases first and then decreases (λ ex = 300 nm) suggesting the emission is assisted with phonons, thus leading to strong exciton−phonon coupling (Figure 2e). 41 (C 6 H 16 N 2 )SbCl 5 were further synthesized for comparison to unveil the origins of the emissions at 550 and 750 nm. Similar to the PL characteristics of compound 1:2.78%Sb 3+ , (C 6 H 16 N 2 )SbCl 5 also shows dual-band emissions (i.e., 500− 650 nm and 650−850 nm) at low temperatures, without RT emission being recorded, as displayed in Figure S15.…”