Investigating the influence of mono-, di-, and trivalent co-dopants (Li+, Na+, K+, Ca2+, Bi3+) on the photoluminescent properties and their prospective role in data security applications for SrAl2O4:Tb3+ nanophosphors synthesized via an eco-friendly combustion method

Materials Science and Engineering B, Journal Year: 2023, Volume and Issue: 299, P. 117008 - 117008

Published: Nov. 21, 2023

Language: Английский

---

Preparation and properties of Tm3+/Eu3+/Tb3+ co-doped La2(PO4)1.5(BO3)0.5 phosphors

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116691 - 116691

Published: Jan. 1, 2025

Language: Английский

---

Deciphering the Photophysical Properties of Nonplanar Heterocyclic Compounds in Different Polarity Environments

The Journal of Physical Chemistry B, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Nonplanar (butterfly-shaped) phenothiazine (PTZ) and its derivative's (M-PTZ) photophysical spectral properties have been tuned by varying the solvents their polarity investigated employing spectroscopic techniques such as UV-Vis, steady-state time-resolved fluorescence, TDDFT calculations. The UV-Vis absorption studies calculations reveal two distinct bands for both compounds: a strong π-π* transition at shorter wavelengths weaker n-π* transition, which displays little bathochromic shift in polar solvents. detailed emission that dual is result of photoinduced excited-state conjugation enhancement (ESCE) process. band wavelength corresponds to locally excited (LE) state, while longer arises from planarized state resulting ESCE. With increase solvent polarity, LE less affected, whereas positive solvatochromism observed ESCE band. As increases, demonstrates significant solvatochromism, intensity decreases with higher suggesting stabilization state. biexponential decay fluorescence lifetimes further corroborates behavior PTZ M-PTZ. exhibits photoluminescence quantum yield (PLQY) than M-PTZ, viscosity influences PLQY, indicating nonradiative activated during planarization also known enhancement. Furthermore, (time-dependent) density functional theory (TD) DFT performed understand geometrical parameters electronic transitions these model molecules corroborate experimental findings. These findings underscore influence molecular structure on dynamics eventually hold substantial implications advanced applications.

Language: Английский

---

Well-Organized Single White-Emitting GdMoBO₆:Eu³⁺, Tb³⁺, Dy³⁺/Bi³⁺ Phosphors Enabled by the Energy Transfer Process for White LED-Based Indoor Lighting

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Language: Английский

---

Luminescence Properties of Bi³⁺-Doped Gd₂O₃ Phosphor under UV and X-ray Excitation

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(47), P. 65024 - 65036

Published: Nov. 18, 2024

X-ray excited luminescence in scintillators plays a crucial role applications ranging from medical diagnostics to industrial quality inspection and scientific research. This study explores the potential of Bi3+-doped Gd2O3 phosphors as next-generation scintillators, leveraging their broad-spectrum emission characteristics achieve higher light yields. We synthesized Gd2O3:Bi3+ two crystalline phases─cubic monoclinic─using high-temperature solid-phase method. These demonstrate varied applications, backlighting displays imaging opaque biological samples. Under UV excitation, each phase exhibits distinct properties due different Bi3+ occupancy environments. The monoclinic phase, at λex = 370 nm, showed stronger broader peak (fwhm 70 nm) with photoluminescence quantum yield (67.94%), compared cubic which under optimal conditions (λex 377 exhibited narrower peaks 40 lower (44.41%). Notably, outperformed (48,900 photons/MeV) detection limits (380 nGy·s–1 λem 430 nm 285 520 nm). Both were also embedded PMMA create thin films for imaging, achieving high-resolution outputs (14 lp·mm–1).

Language: Английский

---

Dual emissive and stable surface-capped silica based nanoparticles for white light emission

Journal of Luminescence, Journal Year: 2024, Volume and Issue: 269, P. 120546 - 120546

Published: March 7, 2024

Language: Английский

---

Synthesis and warm white luminescence properties of single-phase Ca7Mg1.5Zn0.5(PO4)6: Dy3+, Sm3+ phosphor applied for white LEDs

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: unknown, P. 140971 - 140971

Published: Nov. 1, 2024

Language: Английский

---

Dual Emissive and Stable Surface-Capped Silica Based Nanoparticles for White Light Emission

Published: Jan. 1, 2024

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI

Language: Английский

---

Sr0.99Zr(PO4)2:0.01Eu3+ ceramic glass for photoluminescence applications

Journal of Ovonic Research, Journal Year: 2024, Volume and Issue: 20(2), P. 155 - 161

Published: March 1, 2024

This paper reports the first-time synthesis of Sr0.99Zr(PO4)2:0.01Eu3+ nanophosphor via solution combustion method using glycine as fuel at a fuel-to-oxidizer ratio 1:1. The PXRD pattern confirmed formation desired phase, while Scherrer calculation revealed an average particle size approximately 60 nm. Scanning electron microscopy (SEM) further corroborated size, estimating it around 75 material exhibited characteristic mesoporous structure, hallmark technique. Photoluminescence (PL) spectroscopy two intense emission peaks 590 nm and 615 nm, attributed to Eu3+ ions, suggesting potential applications in LED technology. CIE coordinates indicated close white region defined by NTSC standard

Language: Английский

---

Decision making method for accessing the risk factors of blood pressure and cholesterol using Crisp Topsis method

Malaya Journal of Matematik, Journal Year: 2020, Volume and Issue: 8(4), P. 1867 - 1871

Published: Jan. 1, 2020

Language: Английский

---