Perovskite: Scintillators, direct detectors, and X-ray imagers

Materials Today, Journal Year: 2022, Volume and Issue: 55, P. 110 - 136

Published: May 1, 2022

Language: Английский

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Zero‐Dimensional Zn‐Based Halides with Ultra‐Long Room‐Temperature Phosphorescence for Time‐Resolved Anti‐Counterfeiting

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(33)

Published: June 15, 2022

Though fluorescence-tag-based anti-counterfeiting technology has distinguished itself with cost-effective features and huge information loading capacity, the clonable decryption process of spatial-resolved cannot meet requirements for high-security-level anti-counterfeiting. Herein, we demonstrate a spatial-time-dual-resolved system based on new organic-inorganic hybrid halides BAPPZn2 (Cly Br1-y )8 (BAPP=1,4-bis(3-ammoniopropyl)piperazinium, y=0-1) ultra-long room-temperature phosphorescence (RTP). Remarkably, afterglow lifetime can be facilely tuned by regulating halide-induced heavy-atom effect identified naked eyes or help simple machine vision system. Therefore, short-lived unicolor fluorescence lasting-time-tunable RTP provide prerequisites unicolor-time-resolved anti-counterfeiting, which lowers decryption-device further provides design strategy advanced portable technology.

Language: Английский

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Integrated Afterglow and Self‐Trapped Exciton Emissions in Hybrid Metal Halides for Anti‐Counterfeiting Applications

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(18)

Published: March 2, 2022

0D hybrid metal halides (0D HMHs) are considered to be promising luminescent emitters. HMHs commonly exhibit self-trapped exciton (STE) emissions originating from the inorganic halide anion units. Exploring and utilizing emission features of organic cation units in is highly desired enrich their optical properties as multifunctional materials. Here, tunable successfully achieved triphenylsulfonium (Ph3 S+ )-based HMHs. Notably, integrated afterglow STE with adjustable intensities obtained S)2 Sn1-x Tex Cl6 (x = 0-1) via delicate combination [SnCl6 ]2- [TeCl6 . Moreover, such a strategy can readily extended develop other HMH materials intriguing properties. As demonstration, Zn1-x Mnx Cl4 constructed achieve Mn2+ d-d high efficiency. Consequently, these novel colorful applied multiple anti-counterfeiting applications.

Language: Английский

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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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Structural Dimensionality Modulation toward Enhanced Photoluminescence Efficiencies of Hybrid Lead‐Free Antimony Halides

Advanced Optical Materials, Journal Year: 2021, Volume and Issue: 9(19)

Published: June 3, 2021

Abstract Rationally optimizing the photoluminescence performance via accurate structural modulation is one of most important and challenging issues for hybrid halides. Herein, a viable crystal dimensional reduction strategy proposed to reasonably enhance quantum yield (PLQY) antimony halide. Specifically, synthetic technique developed new 1D [DMPZ]SbCl 5 ∙ H 2 O (DP‐SbCl ) sliced 0D [DMPZ] SbCl 6 Cl (H O) with from infinite [SbCl ] 2− chain discrete 3− octahedron. Comparing nonluminescent DP‐SbCl , displays highly efficient broadband yellow light emission enhanced PLQY up 75.94%. First‐principles calculation demonstrates that features more flat narrow band structure, which promotes photoelectron localization increases confinement, finally boosts luminescence efficiency. Together ultra‐stable enable as excellent down‐conversion phosphor successfully fabricate white emitting diodes high color rendering index 92. This work provides novel rationally optimize PL metal

Language: Английский

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Highly Distorted Antimony(III) Chloride [Sb₂Cl₈]²⁻ Dimers for Near‐Infrared Luminescence up to 1070 nm

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(33)

Published: June 23, 2022

Zero-dimensional (0D) hybrid metal halides with unique compositional and structural tunability appear as an emerging class of luminescent materials, but near-infrared (NIR) emitters therein are largely unexplored to date. This study presents three novel 0D antimony chlorines edge-sharing [Sb2 Cl8 ]2- dimers, showing unusual room-temperature broadband NIR emission the maximum wavelength up 1070 nm. Photoluminescence studies density functional theory calculation demonstrate that emissions originate from highly localized excitons, confined dimers in these structures show low symmetry a large degree freedom. These expand range new materials halides.

Language: Английский

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Achieving Near‐unity Photoluminescence Quantum Yields in Organic‐Inorganic Hybrid Antimony (III) Chlorides with the [SbCl₅] Geometry

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(10)

Published: Jan. 9, 2023

Hybrid organic-inorganic antimony halides have attracted increasing attention due to the non-toxicity, stability, and high photoluminescence quantum yield (PLQY). To shed light on structural factors that contribute PLQY, five pairs of with general formula A2 SbCl5 Sb2 Cl8 are synthesized via two distinct methods characterized. The type adopts square pyramidal [SbCl5 ] geometry near-unity while seesaw dimmer [Sb2 PLQY≈0 %. Through combined data analysis literature, we found series generally has much longer Sb⋅⋅⋅Sb distances, leading more expressed lone SbIII . Additional including Sb-Cl distance stability chlorides may also affect PLQY. Our targeted synthesis correlated insights provide efficient tools precisely form highly emissive materials for optoelectronic applications.

Language: Английский

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Organic Cation Design of Manganese Halide Hybrids Glass toward Low‐Temperature Integrated Efficient, Scaling, and Reproducible X‐Ray Detector

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(13)

Published: April 5, 2023

Abstract Zero‐dimensional (0D) structure‐based manganese metal halides (MHs) are believed to be the most promising candidates for next‐generation X‐ray scintillators due their intense radioluminescence and environmental friendliness. However, low‐temperature (<180 °C), large‐area integration with more efficient detection remains a tremendous challenge. Herein, from perspective of cation (ionic liquids) structure design, basic physical parameters 0D MHs regulated. And calculations experimental results demonstrate larger‐size cations that induce lower melting temperatures, larger exciton‐binding energies, ion migration energy, tunable hardness, which desirable MHscintillators. As result, champion materialHTP 2 MnBr 4 is achieved as glassy transparency wafer by (165 °C) melt‐quenching. Its application imaging features high spatial resolution (17.28 lp mm −1 ), scalability (>30 × 30 cm strong coupling force. Furthermore, HTP glass reproducible properties demonstrates light yield (38 000 photon MeV excellent irradiation stability, low limit (0.13 µGy s ). The authors believe this work will provide guidance MHscintillators further commercial applications.

Language: Английский

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Halide Perovskites and Their Derivatives for Efficient, High‐Resolution Direct Radiation Detection: Design Strategies and Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Sept. 20, 2023

The past decade has witnessed a rapid rise in the performance of optoelectronic devices based on lead-halide perovskites (LHPs). large mobility-lifetime products and defect tolerance these materials, essential for optoelectronics, also make them well-suited radiation detectors, especially given heavy elements present, which is strong X-ray γ-ray attenuation. Over decade, LHP thick films, wafers, single crystals have to direct detectors that outperformed incumbent technologies terms sensitivity (reported values up 3.5 × 10

Language: Английский

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Improving X-ray Scintillating Merits of Zero-Dimensional Organic–Manganese(II) Halide Hybrids via Enhancing the Ligand Polarizability for High-Resolution Imaging

Nano Letters, Journal Year: 2023, Volume and Issue: 23(10), P. 4351 - 4358

Published: May 8, 2023

Luminescent metal halides have been exploited as a new class of X-ray scintillators for security checks, nondestructive inspection, and medical imaging. However, the charge traps hydrolysis vulnerability are always detrimental to three-dimensional ionic structural scintillators. Here, two zero-dimensional organic-manganese(II) halide coordination complexes 1-Cl 2-Br were synthesized improvements in scintillation. The introduction polarized phosphine oxide can help increase stabilities, especially self-absorption-free merits these Mn-based hybrids. dosage rate detection limits reached up 3.90 0.81 μGyair/s 2-Br, respectively, superior diagnostic standard 5.50 μGyair/s. fabricated scintillation films applied radioactive imaging with high spatial resolutions 8.0 10.0 lp/mm, holding promise use

Language: Английский

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