Full-color, time-valve controllable and Janus-type long-persistent luminescence from all-inorganic halide perovskites

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 20, 2024

Abstract Long persistent luminescence (LPL) has gained considerable attention for the applications in decoration, emergency signage, information encryption and biomedicine. However, recently developed LPL materials – encompassing inorganics, organics inorganic-organic hybrids often display monochromatic afterglow with limited functionality. Furthermore, triplet exciton-based phosphors are prone to thermal quenching, significantly restricting their high emission efficiency. Here, we show a straightforward wet-chemistry approach fabricating multimode by introducing both anion (Br − ) cation (Sn 2+ doping into hexagonal CsCdCl 3 all-inorganic perovskites. This process involves establishing new trapping centers from [CdCl 6-n Br n ] 4− and/or [Sn 2-n Cd Cl 9 5− linker units, disrupting local symmetry host framework. These halide perovskites demonstrate duration time ( > 2,000 s), nearly full-color coverage, photoluminescence quantum yield ~ 84.47%), anti-thermal quenching temperature up 377 K. Particularly, : x %Br temperature-dependent time-valve controllable time-dependent luminescence, while %Sn exhibit forward reverse excitation-dependent Janus-type luminescence. Combining experimental computational studies, this finding not only introduces local-symmetry breaking strategy simultaneously enhancing lifetime efficiency, but also provides insights dynamic tunability photonics, high-security anti-counterfeiting storage.

Language: Английский

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A Thermo‐Responsive MOFs for X‐Ray Scintillator

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: June 12, 2024

Abstract Thermo‐responsive smart materials have aroused extensive interest due to the particular significance of temperature sensing. Although various photoluminescent are explored in thermal detection, it is not applicable enough X‐ray radiation environment where accuracy and reliability will be influenced. Here, a strategy proposed by introducing concept radio‐luminescent functional building units (RBUs) construct thermo‐responsive lanthanide metal‐organic frameworks (Ln‐MOFs) scintillators for self‐calibrating thermometry. The rational designs RBUs (including organic ligand Tb 3+ /Eu ) with appropriate energy levels lead high‐performance radio‐luminescence. Ln‐MOFs exhibit perfect linear response X‐ray, presenting low dose rate detection limit (min ≈156.1 nGy air s ‐1 ). Self‐calibrating based on ratiometric XEL intensities achieved good absolute relative sensitivities 6.74 8.1%K , respectively. High light yield (max ≈39000 photons MeV −1 ), imaging spatial resolution ≈18 lp mm irradiation stability (intensity ≈100% at 368 K total up 215 Gy giant color transformation visualization benefit applications, especially situ imaging. Such provides promising way develop novel photonic excellent scintillator performances.

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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Arising 2D Perovskites for Ionizing Radiation Detection

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(26)

Published: April 5, 2024

2D perovskites have greatly improved moisture stability owing to the large organic cations embedded in inorganic octahedral structure, which also suppresses ions migration and reduces dark current. The suppression of by effectively excessive device noise baseline drift shows excellent potential direct X-ray detection field. In addition, gradually emerged with many unique properties, such as anisotropy, tunable bandgap, high photoluminescence quantum yield, wide range exciton binding energy, continuously promote development ionizing radiation detection. This review aims systematically summarize advances progress halide perovskite semiconductor scintillator detectors, including reported alpha (α) particle, beta (β) neutron, X-ray, gamma (γ) ray structural features their advantages are discussed. Development directions proposed overcome limitations detectors.

Language: Английский

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Cs₂NaGdCl₆:Tb³⁺─A Highly Luminescent Rare-Earth Double Perovskite Scintillator for Low-Dose X-ray Detection and Imaging

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(15), P. 19068 - 19080

Published: April 8, 2024

Rare-earth-based double perovskite (DP) X-ray scintillators have gained significant importance with low detection limits in medical imaging and radiation owing to their high light yield (LY) remarkable spatial resolution. Herein, we report the synthesis of 3D crystals, namely, Cs

Language: Английский

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C(NH₂)₃MoO₃(IO₃): A Molybdenyl Iodate with Giant Birefringence Designed via a Cation–Anion Synergetic Interaction Strategy

Chemistry of Materials, Journal Year: 2024, Volume and Issue: 36(4), P. 2138 - 2146

Published: Feb. 8, 2024

Birefringent crystals are extensively utilized across diverse optical applications due to their unique property of splitting incident light into dual refracted rays, thereby modulating and controlling polarization. The pursuit promoting the birefringence such facilitate device miniaturization has recently emerged as a prominent area focus. In this investigation, we introduce two molybdenyl iodates, namely, C(NH2)3MoO3(IO3) Rb2MoO2(I2O6)(IO3)2, conceived through "cation–anion synergetic interaction" strategy. Each compound exhibits one-dimensional chain structure. Despite processing similar wide band gaps (3.33 3.22 eV), these materials display variance in (Δn = 0.426 0.261 @546 nm). Notably, showcases highest among all hitherto reported signifying its potential high-performance birefringent crystal. Theoretical analyses indicate that C(NH2)3+ cation, acting birefringence-active unit, significantly bolsters molybdate iodates. Moreover, presence extensive hydrogen-bonding interactions between cations iodates influences orientation highly anisotropic further enhancing C(NH2)3MoO3(IO3). This research paves way for future exploration organic–inorganic hybrid exhibiting exceptional performance.

Language: Английский

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All-Inorganic Ruddlesden–Popper Perovskite Cs₂CdCl₄:Mn for Low-Dose and Flexible X-ray Imaging

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(4), P. 1429 - 1438

Published: March 12, 2024

We report a Mn2+-activated all-inorganic 2D layered Ruddlesden–Popper (RP) perovskite Cs2CdCl4 single crystal as highly efficient and stable X-ray scintillator. The Cs2CdCl4:10% Mn achieves bright orange-red emission with photoluminescence quantum yield up to 90.47%, good environmental stability, decent thermal quenching resistance. As scintillator, shows strong absorption, ultrahigh light 88138 photons/MeV, low detection limit of 31.04 nGyair/s. A 15 × cm flexible scintillation screen is prepared by mixing poly(dimethylsiloxane) (PDMS) Cs2CdCl4:Mn powder, which demonstrates superior imaging performance high spatial resolution 16.1 lp mm–1 at modulation transfer function (MTF) = 0.2. Importantly, due the sensitivity, scintillator achieved clear an extremely dose 16 μGyair/s. This successful exploitation in low-dose would provide new insight into high-sensitivity detection.

Language: Английский

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Photophysical Properties of Copper Halides with Strongly Confined Excitons and Their High‐Performance X‐Ray Imaging

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 25, 2024

Abstract Copper halides, a new class of attractive and potential scintillators, have attracted tremendous attention in X‐ray imaging. However, the ambiguity surrounding their exciton properties unclear effect crystal structure on photophysical performance hinder an in‐depth understanding luminescence mechanism further application imaging field. Herein, copper halide scintillators Cs 3 Cu 2 X 5 (X = I, Br, Cl) with 0D is prepared, are revealed using both theoretical calculation experimental verification. The small Bohr diameter together high binding energy can cause to hold strongly confined excitons lack quantum‐size effects. materials exhibit structural framework soft lattice Frenkel strong confinement effects, resulting self‐trapped excitons. In particular, I demonstrated as efficient scintillator radioluminescence efficiency spatial resolution ≈106 µm radiography, which primarily attributed improve radiative recombination probability electron‐hole pairs. Overall, this work provides pathway for developing performance.

Language: Английский

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Low‐Dimensional Metal Halide for High Performance Scintillators

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 25, 2024

Abstract Inorganic scintillators play a pivotal role in diverse fields like medical imaging, nondestructive detection, homeland security, and high‐energy physics. However, traditional inorganic encounter challenges such as high fabrication costs low light yield. Recently, low‐dimensional metal halide (LDMHS) have witnessed rapid progress, owing to their distinctive crystal structure superior radioluminescence performance. Herein, an overview of recent advancements proposed instructive pathways for achieving high‐performance LDMHS is provided. First, the scintillation physical mechanism emphasis on essential requirements applications are elucidated. Furthermore, classified according B‐site cations, respective characteristics introduced. This encompasses understanding structure‐property relationships routes rules optimizing Finally, persisting this burgeoning field potential research directions future exploration discussed.

Language: Английский

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Monolithic integration of perovskite heterojunction on TFT backplanes through vapor deposition for sensitive and stable x-ray imaging

Science Advances, Journal Year: 2024, Volume and Issue: 10(17)

Published: April 26, 2024

Metal halide perovskites exhibit substantial potential for advancing next-generation x-ray detection. However, fabricating high-performance pixelated imaging arrays remains challenging due to the dark current density and stability issues associated with common organic-inorganic hybrid perovskites. Here, we develop a vapor deposition method create first all-inorganic perovskite heterojunction film. The introduction effectively reduces of detectors about 0.8 nA·cm −2 , satisfying thin-film transistor (TFT) integration standards, while also increases sensitivity above 2.6 × 10 4 μC·Gy air −1 ·cm thus giving rise record low detection limit <1 nGy ·s among all polycrystalline perovskite–based detectors. devices demonstrate remarkable across multifarious demanding working conditions. Last, through monolithic film 64 TFT array, have achieved high-resolution real-time imaging, which paves way application in low-dose flat-panel

Language: Английский

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