Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: Jan. 2, 2025

Abstract Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to zero-dimensional nature crystal lattice minimizes energy crosstalk, different excitonic states be selectively excited by ultraviolet light, X-ray irradiation, mechanical action, enabling dynamic control steady/transient-state features modulating excitation modes. Remarkably, transparent exhibits efficient white photoluminescence (quantum yield >97%), blue emission with long afterglow (duration >9 h), high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal exceptional capability low-dimensional integrating various luminescence, offering exciting opportunities multi-level data encryption all-in-one authentication technologies.

Language: Английский

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Transformative effects of homo-valence ion doping on persistent luminescence nanophosphors for radiotherapy monitoring

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161412 - 161412

Published: March 1, 2025

Language: Английский

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Light/X-ray/ultrasound activated delayed photon emission of organic molecular probes for optical imaging: mechanisms, design strategies, and biomedical applications

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(22), P. 10970 - 11003

Published: Jan. 1, 2024

Versatile energy inputs, including light, X-ray and ultrasound, activate organic molecular probes to undergo different delay mechanisms, charge separation, triplet exciton stabilization chemical trap, for delayed photon emission.

Language: Английский

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Dynamic and Static Stress Sensing Based on Mechanical Quenching Phenomenon From CaZnOS:Cu⁺

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Abstract Mechanical quenching (MQ) represents a distinctive mechano‐optical response, in which the afterglow intensity is quenched under applied mechanical stress. Compared with mechanoluminescent (ML) materials, research on physical mechanism and sensing application of MQ materials still insufficient. Moreover, existing typically respond only to dynamic stress, while ML are unable exhibit luminescence static restricting their utility stress‐sensing applications. In this work, characteristics CaZnOS:Cu + systematically studied, displays linear response Furthermore, material shows sensitive micro‐strain stretching tests. Therefore, novel switch device introduced combined LiTaO 3 :Tb 3+ . By comparing alteration during stretching, different stages stress digitally encoded, achieving both effectively differentiating information output. These findings provide new approach for multi‐mode by utilizing pave significant avenue integration field sensing.

Language: Английский

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Competitive Phase Transition of NaYS₂ in Non‐Vacuum Environment for Cutting‐Edge Anti‐Counterfeiting

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Abstract Recently, chalcogenides with layered structures exhibit promising applications in the fields of information chaos processing and compilation remodeling, yet facile synthesis their microcrystals multi‐temporal multi‐modal luminescence remains a major challenge. Herein, competitive phase transition to generate orderly NaYS 2 is achieved by lattice reconstruction introduction S 2− occupying unique anionic site non‐vacuum sulfur‐rich environment, revealing crucial role transitions regulating material structure properties. Simultaneous photoinduced luminescent chromism photo‐stimulated are attained introducing Pr 3+ . Interestingly, broadband long‐wavelength visible afterglow emission 4f 1 5d cluster state reversible temporary change upconversion from orange green narrowband occurs under continuous 980 nm excitation, which attributed ordered polarization YS 6 layer injection defects. Furthermore, integrating long‐lived down‐conversion relatively short‐lived up‐conversion ‐doped , multilevel dynamic optical anti‐counterfeiting platform constructed based on transient long luminescence. This work implements 2D structure, providing new model tunable space‐time resolved for spatiotemporal optoelectronic multiplexing, applicable large‐capacity encryption, data storage, biosensing.

Language: Английский

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Insight into Luminescence Properties of Robust BaSi₃Al₃O₄N₅:Ce³⁺ Blue Persistent Phosphors for Optical Information Storage

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

The commercial blue persistent luminescent (PersL) phosphor (CaAl2O4:Eu2+,Nd3+) is renowned for its exceptional PersL duration, but it hampered by poor chemical stability. There an urgent need to develop phosphors that can combine the excellent property with robust In this work, we report on a series of highly stable Ce3+-doped oxynitride phosphors. Notably, BaSi3Al3O4N5:Ce3+ has been identified contain two distinct types defects in host: one associated photoluminescence (PL) and other electron trapping detrapping dynamics. These intrinsic have systematically investigated confirmed analyzing both PL spectra, which could be generated nitrogen deficiency existing oxygen vacancy BaSi3Al3O4N5. widely distributed trap from 0.21 1.02 eV, peak at 0.63 as determined initial rise method. exhibits not only water-resistance stability also superior heat-resistant Leveraging traps great stability, successfully demonstrated optical information storage ability using gradual writing This comprehensive study provides valuable insights into development potential applications optoelectronic devices.

Language: Английский

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Rate-Dependent Mechanoluminescence in SrZn₂S₂O:Mn²⁺ for Time-Characterized Optoelectronic Devices

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: 129(9), P. 4715 - 4723

Published: Feb. 26, 2025

Self-recoverable mechanoluminescence (ML) has demonstrated broad applications in mechanosensory optoelectronic devices based on pressure- and rate-dependent emission performance. However, understanding the coupled effect of pressure rate ML kinetics remains elusive, limiting design time-characterized ML-based devices. Here, we show that SrZn2S2O:Mn2+ exhibits an oscillatory behavior with a series sharp peaks time-dependent curve under rapid compression from 0.1 to 11.0 GPa at critical rates ∼1.7–4.7 GPa/s, distinct decompression which presents peaks. The X-ray diffraction measurement shows SrZn2S2O matrix is stable up ∼14.6 above it transforms new structure. Photoluminescence spectroscopy changes monotonically intensity wavelength range 0.1–8.2 GPa. By combining experimental results piezoelectric detrapping model, suggest may result multiple-cyclic processes piezoelectrically induced excitation luminescent activators, indicating intrinsic response compression. be conducive temporal characteristics.

Language: Английский

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Abnormal Slow Phonon Dynamics Toward Prolonging Excited States Dynamics Enabled by Crystalline‐Assembling Donor–Acceptor Molecules

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract Phonon dynamics are a critical factor to control the optical properties of excited states in light‐emitting materials. Here, we report an extremely slow relaxation photoexcited lattice vibrations enabled by assembling donor‐acceptor (D–A) molecules [2‐(9,9‐dimethylacridin‐10(9H)‐yl)‐9,9‐dimethyl‐9H‐thioxanthene 10,10‐dioxide], namely AC molecules, into dipolar crystal. By using photoexcitation‐modulated Raman spectroscopy, find that crystalline‐lattice monitored Raman‐scattering laser beam 785 nm demonstrate un‐usual time scale seconds after ceasing photoexcitation 343 such This presents phonon crystalline‐assembling D–A Simultaneously, photoluminescence (PL) exhibits prolonged behavior, lasting 10 ms phenomenon provides experimental hypothesis function as important mechanism unusually prolong upon can be verified directly suppressing through freezing molecular liquid crystalline solid at 77 K largely PL 1 s‐ removing photoexcitation. Clearly, provide necessary conditions enable toward prolonging dynamics.

Language: Английский

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X-ray imaging and storage based on a NaF modified Y₃Al₂Ga₃O₁₂:Ce phosphor

Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Y 3 Al x Ga (5− ) O 12 :Ce phosphors with a broad trap distribution were synthesized via molten salt method. High-resolution X-ray real-time imaging, time-lapse and storage achieved using 2 @PDMS composite films.

Language: Английский

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Efficient energy transfer from organic triplet states to Mn²⁺ dopants for dynamic tunable multicolor afterglow in 1D hybrid cadmium chloride

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Tuning Mn 2+ doping in the novel 1D hybrid metal halide enables afterglow color transitions from yellow-green to yellow, orange, and red, resulting efficient energy transfer stable organic triplet states 4 T 1 level of dopants.

Language: Английский

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