Highly emissive zero-dimensional antimony halide for anti-counterfeiting and confidential information encryption-decryption

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 431, P. 134336 - 134336

Published: Dec. 24, 2021

Language: Английский

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(C16H28N)2SbCl5: A new lead-free zero-dimensional metal-halide hybrid with bright orange emission

Science China Materials, Journal Year: 2022, Volume and Issue: 65(6), P. 1594 - 1600

Published: Jan. 29, 2022

Language: Английский

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2D Perovskite Mn²⁺‐Doped Cs₂CdBr₂Cl₂ Scintillator for Low‐Dose High‐Resolution X‐ray Imaging

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(26)

Published: March 27, 2023

High-performance X-ray scintillators with low detection limits and high light yield are of great importance a challenge for low-dose imaging in medical diagnosis industrial detection. In this work, the synthesis new 2D perovskite, Cs2 CdBr2 Cl2 , via hydrothermal reaction is reported. By doping Mn2+ into yellow emission located at 593 nm obtained, photoluminescence quantum (PLQY) :5%Mn2+ perovskite reaches highest value 98.52%. The near-unity PLQY negligible self-absorption enable excellent scintillation performance 64 950 photons MeV-1 limit 17.82 nGyair s-1 . Moreover, combining poly(dimethylsiloxane) to fabricate flexible scintillator screen achieves resolution 12.3 line pairs (lp) mm-1 results suggest that promising candidate high-resolution imaging. study presents approach designing high-performance through metal-ion doping.

Language: Английский

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Multisite Fine‐Tuning in Hybrid Cadmium Halides Enables Wide Range Emissions for Anti‐Counterfeiting

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 13, 2024

Abstract Achieving tunable emissions spanning the spectrum, from blue to near‐infrared (NIR) light, within a single component is formidable challenge with significant implication, particularly in tailoring multicolor luminescence for anti‐counterfeiting purposes. In this study, we demonstrate broad spectrum of emissions, covering red and extending into NIR light [BPy] 2 Cd X 4 : x Sb 3+ (BPy=Butylpyridinium; =Cl, Br; =0 0.08) through precise multisite structural fine‐tuning. Notably, CdBr manifest distinctive pattern, transitioning yellow tandem host further its homologous CdCl , resulting simultaneous presence intersecting independent emission colors. Detailed modulation chemical composition enables partial switching, facilitating creation diverse patterns by employing as phosphors. This study first time successfully implements several groups colors matrix via Such an effective strategy not only develops specific relationships between adjustable compositions, but also introduces cost‐effective straightforward approach achieving unique, high‐level, plentiful‐color multiple‐information‐storage labels advanced applications.

Language: Английский

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Realizing efficient broadband near-infrared emission and multimode photoluminescence switching via coordination structure modulation in Sb³⁺-doped 0D organic metal chlorides

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2230 - 2241

Published: Jan. 1, 2024

We developed three NIR emitters of Sb 3+ -doped 0D organic metal chlorides and demonstrated their night vision applications in vision. One shows tunable emission characteristics quintuple-mode fluorescence anti-counterfeiting information encryption.

Language: Английский

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Temperature/Component‐Dependent Luminescence in Lead‐Free Hybrid Metal Halides for Temperature Sensor and Anti‐Counterfeiting

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)

Published: June 6, 2024

Abstract Hybrid metal halides (HMHs) have emerged as a promising platform for optically functional crystalline materials, but it is extremely challenging to thoroughly elucidate the electron transition coupled additional ligand emission. Herein, discover sequences of lead‐free HMHs with distinct active cations are aimed, that is, Sb 3+ (5s 2 ) lone‐pair configuration and In (4d 10 fully‐filled configuration. (Me NH 4 M Cl 6 ·Cl = −CH 3 , Sb, In) exhibits superior temperature/component‐dependent luminescence behaviors resulting from competition between triplet‐states (T n ‐S 0 self‐trapped excitons (STEs) inorganic units singlet‐state (S 1 organic cations, which manipulated by optical activity levels [SbCl ] 3− [InCl . The bonding differences /In − in terms electronic excitation hybridization emphasized, different electron‐transition mechanisms established according PL spectra at extreme temperature 5 305 K theoretical calculations. By fine‐tuning B‐site alloying, photoluminescence quantum yield (PLQY 81.5%) stability optimized 20% alloying This research sheds light on rules governing HMHs, well exploring optical‐functional application aviation sensors access‐control systems.

Language: Английский

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Realizing High-Efficiency Yellow Emission of Organic Antimony Halides via Rational Structural Design

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(40), P. 45611 - 45620

Published: Sept. 30, 2022

Zero-dimensional (0D) organic metal halides have captured extensive attention for their various structures and distinguished optical characteristics. However, achieving efficient emission through rational crystal structure design remains a great challenge, how the affects photophysical properties of 0D is currently unclear. Herein, regulation strategy in Sb(III)-based proposed to realize near-unity photoluminescence quantum yield (PLQY). Specifically, two compounds with different coordination configurations, namely, (C25H22P)2SbCl5 (C25H22P)SbCl4 (C25H22P+ = benzyltriphenylphosphonium), were successfully obtained by precisely controlling ratio initial raw materials. adopts an octahedral geometry shows highly broadband yellow PLQY 98.6%, while exhibits seesaw-shaped [SbCl4]- cluster does not emit light under photoexcitation. Theoretical calculations reveal that, rationally structure, indirect bandgap can be converted direct (C25H22P)2SbCl5, thus ultimately boosting intensity. Together outstanding stability high-performance white-light emitting diode (WLED) high luminous efficiency 31.2 lm W-1 demonstrated. Our findings provide novel regulate crystals, so as optimize luminescence halides.

Language: Английский

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High Quantum Efficiency of Stable Sb‐Based Perovskite‐Like Halides toward White Light Emission and Flexible X‐Ray Imaging

Advanced Optical Materials, Journal Year: 2022, Volume and Issue: 10(23)

Published: Sept. 8, 2022

Abstract Although low‐dimensional hybrid metal halides have emerged as promising light emitters due to their broadband emission originated from self‐trapped exciton (STE), the synthesis of lead‐free with high photoluminescence quantum yield remains a challenge. Herein, series new luminescent single crystals antimony‐based [Na(DMSO) 2 ] 3 SbBr 6− x Cl ( = 0, 2, 3, 4, 6) is synthesized. By optimizing ratio Br and Cl, exhibits an ultra‐broadband yellow peaking at 606 nm full width half‐maximum 160 90.6%. Both experimental characterizations theoretical calculations indicate that STE responsible for emission. Furthermore, blue LED chip‐pumped white light‐emitting diodes by using yellow‐emitting are demonstrated, showing correlated color temperature 3948 K rendering index 85. Finally, large‐size flexible scintillator used X‐ray imaging prepared template assembled method, exhibiting spatial resolution 15.5 lp mm − 1 low detection limit 285.8 nGyair s −1 . This work highlights potential Sb‐based in solid‐state illumination imaging.

Language: Английский

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Biuret Induced Tin‐Anchoring and Crystallization‐Regulating for Efficient Lead‐Free Tin Halide Perovskite Light‐Emitting Diodes

Small, Journal Year: 2022, Volume and Issue: 18(17)

Published: March 22, 2022

Lead-free perovskite emitters, particularly 2D tin (Sn) halide perovskites, have attracted considerable academic attention in recent years. However, the problems of Sn oxidation and rapid crystallization lead to an inferior morphology with high trap states, thus limiting luminous efficiency light-emitting diodes (PeLEDs). In this study, authors establish approach by introducing organic additive, 2-imidodicarbonic diamide (biuret), address issues fast crystallization. The unique symmetrical carbonyl groups biuret robustly interact Sn-I framework, providing a strong Sn-anchoring effect. Consequently, it also suppresses easy Sn2+ , regulating process simultaneously. Density functional theory (DFT) calculations confirmed robust interaction between perovskite. Furthermore, demonstrate efficient PeLEDs saturated red emission at 637 nm, maximum luminance (Lmax ) 418 cd m-2 external quantum (EQEmax 1.37%, half-life (T50 288 s. This work provides insights on microcosmic chemical organics advancing development lead-free PeLEDs.

Language: Английский

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Thermally Activated Long Persistent Luminescence of Organic Inorganic Metal Halides

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(14)

Published: Feb. 4, 2023

Abstract Long persistent luminescence (LPL) materials of SrAl 2 O 4 doped with Eu 2+ or Dy 3+ can maintain emission over hours after ceasing the excitation but suffer from insolubility, high cost, and harsh preparation. Recently, organic LPL guest‐host exciplex systems has been demonstrated via an intermediate charge‐separated state flexible design poor air‐stability. Here, we synthesized a nontoxic two‐dimensional organic–inorganic metal hybrid halides (OIMHs), called PBA [ZnX ] X=Br Cl PBA=4‐phenylbenzylamine. These exhibit stable minutes at room‐temperature, which is two orders magnitude longer than those previously reported OIMHs. The mechanism study shows that comes thermally activated charge separation rather room‐temperature phosphorescence. Moreover, be excited by low power sources, representing effective strategy for developing low‐cost high‐stability systems.

Language: Английский

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