Multimode Dynamic Photoluminescence of Bi³⁺-Activated ZnGa₂O₄ for Optical Information Encryption

Inorganic Chemistry, Год журнала: 2023, Номер 62(24), С. 9671 - 9678

Опубликована: Июнь 3, 2023

Optical storage technology for information encryption is a popular means of safeguarding information. Herein, Bi3+-activated ZnGa2O4 multimode dynamic photoluminescence (PL) material developed. Upon being irradiated with an ultraviolet lamp at fixed excitation wavelength 254 nm, the ZnGa2O4: x% Bi3+ (x = 0.5-5.0) samples exhibit varying degrees PL emission due to distinct doping effect. The mechanism underlying associated trap concentration modulation investigated using thermoluminescence spectra. Additionally, 5% sample shows reversible thermally responsive color variation from blue red upon heating 283 393 K. Predesigned procedures based on single-wavelength-mediated photochromic and thermochromic emissions are designed rewritable optical data high-level encryption. Also, enhanced scheme mask encoding technique applying hybridized polyvinylidene difluoride film then proposed increase security level. Accordingly, this work provides feasible way rationally design offering more creative designs via

Язык: Английский

---

Tailoring Ultra‐Wide Visible‐NIR Luminescence by Ce³⁺/Cr³⁺/Yb³⁺‐alloying Sc‐Based Oxides for Multifunctional Optical Applications

Advanced Optical Materials, Год журнала: 2024, Номер 12(15)

Опубликована: Янв. 28, 2024

Abstract Visible‐to‐near‐infrared (VIS‐NIR) luminescent materials are in great demand the field of non‐destructive testing such as component determination and hyperspectral imaging. Although Cr 3+ ‐activated phosphors widely reported, controllable tailoring ultra‐wide VIS‐NIR luminescence excited by blue light is still a challenge. The strategies cationic substitution energy transfers effective for adjusting phosphors. In this work, series ‐doped Sc‐based solid solution (Ba 3‐m Sr m Sc 4 O 9 :Cr ) reported. Under excitation light, these exhibit broadband emission due to different centers induced occupying sites. Because weaker crystal strength, realizes with longer peak position (λ em = 820 nm) broader full width at half maximum (FWHM≈182 Ba 2 SrSc . Furthermore, Ce /Yb ions introduced into , achieving an (460–1200 →Cr →Yb multiple transfers. Designing beneficial improve quantum efficiency weaken thermal quenching. Finally, NIR phosphor‐converted light‐emitting diode (pc‐LED) fabricated demonstrates potential night‐vision water detection. This work provides design idea chemical transfer.

Язык: Английский

---

Multicolor and multimodal luminescence in an Er³⁺ single-doped double perovskite for advanced anti-counterfeiting and encryption

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(15), С. 4721 - 4730

Опубликована: Янв. 1, 2024

The Er 3+ single-doped NaGdTi 1.8 Al 0.2 O 6 double perovskite material achieves multicolor luminescence, afterglow, and upconversion emission by responding to several types of excitation ranging from UV NIR thermal disturbance.

Язык: Английский

---

Photoluminescence Analysis and Judd–Ofelt Studies in Sr2MgSi2O7:Sm3+ Phosphor

Brazilian Journal of Physics, Год журнала: 2024, Номер 55(1)

Опубликована: Ноя. 26, 2024

Язык: Английский

---

Tailor Traps in Bi³⁺-Doped NaGdGeO₄ Phosphors by Introducing Eu³⁺ Ions to Switch Multimodal Phosphorescence Emission

Inorganic Chemistry, Год журнала: 2023, Номер 62(33), С. 13362 - 13369

Опубликована: Авг. 4, 2023

Featured with a tunable excitation/emission wavelength and excellent physicochemical stability, inorganic fluorescent materials are widely used in the fields of anti-counterfeiting. Here, we design multi-stimuli-responsive dynamic fluorescence phosphorescence anti-counterfeiting material by introducing Eu3+ ions NaGdGeO4: Bi3+ to tailor trap structure. The photoluminescence (PL), long persistent luminescence (LPL), photo-stimulated (PSL) colors Bi3+, can be switched varying excitation modes (ultraviolet, near infrared, X-ray light). Especially, LPL PSL vary increasing decay stimulation times. In addition, ensures specificity compared ultraviolet excitation. This rapidly-changing-color offers possibility sophisticated applications future.

Язык: Английский

---

Visualizing temperature inhomogeneity using thermo-responsive smart materials

Materials Horizons, Год журнала: 2023, Номер 10(12), С. 5684 - 5693

Опубликована: Янв. 1, 2023

Thermo-responsive smart material with abundant colors and amazing color-changing luminescence feature can achieve highly efficient simple visualization of invisible thermal distribution in industry beyond.

Язык: Английский

---

Multimode-Responsive Luminescence of Er³⁺ Single-Activated CaF₂ Phosphor for Advanced Information Encryption

Inorganic Chemistry, Год журнала: 2023, Номер 62(40), С. 16485 - 16492

Опубликована: Сен. 22, 2023

The current optical anticounterfeit strategies that rely on multimode luminescence in response to the photon or thermal stimuli have significant importance field of anticounterfeiting and information encryption. However, dependence light heat sources might limit their flexibility practical applications. In this work, Er3+ single-doped CaF2 phosphors show multistimuli-responsive been successfully prepared. as-obtained CaF2:Er3+ phosphor exhibits green photoluminescence (PL) color-tunable up-conversation (UC) from red due cross-relaxation ions. Additionally, also display mechano-luminescence behavior, which is induced by contact electrification between particles PDMS polymers, enabling flexibly respond mechanical stimuli. Moreover, feasible schemes with capability flexible decryption constructed, further expanding application materials advanced

Язык: Английский

---

Dual Regulation of Energy/Electron Transfer in MOF@COP Heterojunctions through Ingenious Molecular Engineering for Enhanced Sonodynamic Cancer Therapy

ACS Materials Letters, Год журнала: 2024, Номер 6(9), С. 4302 - 4311

Опубликована: Авг. 20, 2024

Sonosensitization-mediated reactive oxygen species generation associated with energy and electron transfer is an essential process of sonodynamic therapy. However, the development sonosensitizers both high intersystem crossing (ISC) rates efficient carrier separation remains greatly challenging. Herein, we present a new scheme to construct class heterojunctions (MC-R, R = −H, −OCH3, −Br) by Zr-based metal–organic framework (NU-901) porphyrin-based covalent organic polymers (COPs) different substituents. In this sonocatalytic system, type-II heterojunction based on NU-901 COPs can effectively promote electron–hole pairs, increasing superoxide anions, while introduction substituents (−OCH3, extend conjugation p-π binding enhance spin–orbit coupling through heavy atom effects, which could regulate ISC improve quantum yield singlet oxygen. Remarkably, MC-Br as representative MC-R exhibits best tumor inhibition efficiency in vivo.

Язык: Английский

---

Multi-color Ca3Ga4O9: Pr3+ phosphors for high-security-level optical information storage

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179800 - 179800

Опубликована: Март 1, 2025

Язык: Английский

---

Luminescent afterglow and storage behavior in Mg2+/Sr2+-doped C12A7: Tb3+ photo-stimulate phosphors

Journal of Materials Science Materials in Electronics, Год журнала: 2025, Номер 36(10)

Опубликована: Апрель 1, 2025

Язык: Английский

---