Ultra‐Sensitive, Selective and Repeatable Fluorescence Sensor for Methanol Based on a Highly Emissive 0D Hybrid Lead‐Free Perovskite

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(35)

Опубликована: Июнь 7, 2022

A convenient and rapid detection method for methanol in ethanol remains a major challenge due to their indistinguishable physical properties. Herein, novel fluorescence probe based on perovskite was successfully designed overcome this bottleneck. We report new zero-dimensional (0D) hybrid of [MP]2 Inx Sb1-x Cl7 ⋅ 6 H2 O (MP=2-methylpiperazine) displaying an unusual green light emission with near-unity photoluminescence quantum yield. Remarkably, 0D exhibits reversible methanol-response luminescence switching between yellow color but fail any other organic vapors. Even blended alcohol solutions, the luminescent excellent sensing performance multiple superiorities response time (30 s) ultra-low limit (40 ppm), etc. Therefore, can be utilized as perfect detect traces from ultrahigh sensitivity, selectivity repeatability. To best our knowledge, work represents first wide potential environmental monitoring detection,

Язык: Английский

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

Advanced Materials, Год журнала: 2023, Номер 35(26)

Опубликована: Март 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.

Язык: Английский

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Reversible Triple-Mode Photo- and Radioluminescence and Nonlinear Optical Switching in Highly Efficient 0D Hybrid Cuprous Halides

Chemistry of Materials, Год журнала: 2023, Номер 35(17), С. 6598 - 6611

Опубликована: Авг. 17, 2023

Multifunctional stimuli-responsive luminescent and optical switching is extremely crucial for wide advanced photonic applications, but it remains a challenging objective halide perovskites. Herein, by performing single-crystal to (SC–SC) transformation as dynamic molecular strategy, we realized reversible triple-mode photoluminescence, radioluminescence (PL RL), nonlinear (NLO) in pair of zero-dimensional (0D) hybrid cuprous halides [ETPP]2Cu4Br6 [ETPP]CuBr2. Specifically, [ETPP]CuBr2 display highly efficient yellow green light emissions under UV excitation with the highest quantum yield up near unity. Simultaneously, identical can also be activated using X-ray RL 57,974 photons MeV–1, surpassing most previously reported halides. Most remarkably, SC–SC between them an ethanol impregnation-heating process, which provides PL/RL transitions two light-emitting states. Additionally, this process accompanied transition centrosymmetric NLO-inactive noncentrosymmetric NLO-active through second harmonic generation (SHG) "silent-active" switching. To best our knowledge, first PL, RL, SHG perovskite chemistry, realize applications data storage, information security, logic gates, etc.

Язык: Английский

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Multiexciton Generation from a 2D Organic–Inorganic Hybrid Perovskite with Nearly 200% Quantum Yield of Red Phosphorescence

Advanced Materials, Год журнала: 2023, Номер 35(18)

Опубликована: Фев. 18, 2023

2D organic-inorganic hybrid perovskites (OIHPs) show obvious advantages in the field of optoelectronics due to their high luminescent stability and good solution processability. However, thermal quenching self-absorption excitons caused by strong interaction between inorganic metal ions lead a low luminescence efficiency perovskites. Herein, Cd-based OIHP phenylammonium cadmium chloride (PACC) with weak red phosphorescence (ΦP < 6%) at 620 nm blue afterglow is reported. Interestingly, Mn-doped PACC exhibits very emission nearly 200% quantum yield 15 ms lifetime, thus resulting afterglow. The experimental data prove that doping Mn2+ not only induces multiexciton generation (MEG) process perovskite, avoiding energy loss excitons, but also promotes Dexter transfer from organic triplet realizing superefficient red-light Cd2+ . This work suggests guest can induce host realize MEG bulk OIHPs, which provides new idea for development optoelectronic materials devices ultrahigh utilization.

Язык: Английский

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

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(15)

Опубликована: Фев. 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.

Язык: Английский

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

Advanced Functional Materials, Год журнала: 2024, Номер 34(34)

Опубликована: Июнь 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.

Язык: Английский

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Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

Inorganic Chemistry, Год журнала: 2022, Номер 61(18), С. 7143 - 7152

Опубликована: Апрель 29, 2022

Metal halide perovskites have flexible crystal and electronic structures adjustable emission characteristics, which very broad applications in the optoelectronic field. Among them, all-inorganic attracted more attention than others recent years because of their characteristics large diffusion length, high luminescence efficiency, good stability. In this work, Sb3+-doped RbCdCl3 crystalline powder was synthesized by a simple hydrothermal method, its properties were studied, showed band with Stokes shift efficient yellow light at about 596 nm room temperature photoluminescence quantum yield 91.7%. The came from transition self-trapped exciton 1 (STE1) out 3Pn (n = 0, 1, 2) to S0 due strong electron-phonon coupling, scaled increasing temperature. Moreover, color became white low temperatures occurrence other 0 (STE0) state 1S states Sb ions lattice. These changes may be used for sensing, material expands knowledge luminescent inorganic family further perovskites.

Язык: Английский

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Origin of singlet self-trapped exciton and enhancement of photoluminescence quantum yield of organic–inorganic hybrid antimony(III) chlorides with the [SbCl5]2− units

Nano Research, Год журнала: 2023, Номер 16(11), С. 12680 - 12688

Опубликована: Авг. 29, 2023

Язык: Английский

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Multimode Luminescence with Temperature and Energy Level Synergistic Dependence in Rare Earth Halide DPs for Advanced Multifunctional Applications

Small, Год журнала: 2024, Номер 20(35)

Опубликована: Апрель 29, 2024

Abstract Rare‐earth halide double perovskites (DPs) have attracted extensive attention due to their excellent optoelectronic performance. However, the correlation between luminescence performance, crystal structure, and temperature, as well inherent energy transfer mechanism, is not understood. Herein, Lanthanide ions (Ln 3+ : Nd or Dy ) co‐dopants are incorporated into Sb doped Cs 2 NaYbCl 6 DPs construct (ET) models reveal effects of temperature levels rare earth on ET. The different excited state structures ‐Ln at temperatures relative positions synergistically determine physical processes luminescence. These multi‐mode luminescent materials exhibit good performance in anti‐counterfeiting, NIR imaging, sensing. This work provides new insights mechanism related photophysical process.

Язык: Английский

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Luminescence regulation of Sb³⁺ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting

Opto-Electronic Advances, Год журнала: 2024, Номер 7(3), С. 230197 - 230197

Опубликована: Янв. 1, 2024

The Sb³⁺ doping strategy has been proven to be an effective way regulate the band gap and improve photophysical properties of organic-inorganic hybrid metal halides (OIHMHs). However, emission ions in OIHMHs is primarily confined low energy region, resulting yellow or red emissions. To date, there are few reports about green Sb³⁺-doped OIHMHs. Here, we present a novel approach for regulating luminescence 0D C₁₀H₂₂N₆InCl₇·H₂O via hydrogen bond network, which water molecules act as agents bonding. shows broadband peaking at 540 nm high photoluminescence quantum yield (PLQY) 80%. It found that intense stems from radiative recombination self-trapped excitons (STEs). Upon removal with heat, C₁₀H₂₂N₆In_1-xSb_xCl₇ generates emission, attributed breaking network large structural distortions excited state. Once adsorbed by C₁₀H₂₂N₆In_1-xSb_xCl₇, it can subsequently emit light. This water-induced reversible switching successfully used optical security information encryption. Our findings expand understanding how local coordination structure influences mechanism provide method control STEs emission.

Язык: Английский

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