Hydrolytic‐Resistance Long‐Persistent Luminescence SrAl₂O₄:Eu²⁺,Dy³⁺ Ceramics for Optical Information Storage

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 18, 2024

Abstract SrAl 2 O 4 :Eu 2+ , Dy 3+ (SAED) is one of the most popular materials for information storage and night display applications because it has a wide excitation range long afterglow duration. However improving hydrolytic resistance SAED remains challenge. In this study, presented to be ceramic type by solid‐state reaction in vacuum ambiance. The achieved 8200 mcd m −2 initial luminescence intensity. It can also obtain long‐persistent after UV light irradiation even soaking water more than 30 days. This demonstrates sustained imaging capability irradiated under 365 nm X‐ray, as well erasability reproducibility lighting heating. These results indicate promising ceramics optical complex environments. phase evolution identified directly micromorphology first time based on scanning electron microscopy coupled with cathodoluminescence system.

Язык: Английский

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Pb²⁺ and Mn²⁺ Codoped Cs₂CdCl₄ Nanocrystals with Tunable Emission

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Язык: Английский

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

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 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.

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

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Band Gap Tuning in Inorganic Chlorine-Based Halide Perovskites Via Solid-State Synthesis at Room Temperature

Journal of Solid State Chemistry, Год журнала: 2025, Номер unknown, С. 125341 - 125341

Опубликована: Март 1, 2025

Язык: Английский

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