Novel “Anti-Zeolite” Ba3Sr3B4O12: Eu3+ Phosphors: Crystal Structure, Optical Properties, and Photoluminescence DOI Open Access
Р. С. Бубнова, A.P. Shablinskii, Alexey V. Povolotskiy

et al.

Symmetry, Journal Year: 2023, Volume and Issue: 15(7), P. 1399 - 1399

Published: July 11, 2023

Novel Ba3Sr3B4O12: Eu3+ phosphors were synthesized by crystallization from a melt. The crystal structures of Ba3(Sr3−1.5xEux)B4O12 (x = 0.03, 0.06, 0.15, 0.20, 0.25) solid solutions refined SCXRD data. can be described in terms the cationic sublattice and belong to “anti-zeolite” family borates. Its framework is constructed Ba Sr atoms. ions occupy Sr(1) extraframework site 0.01–0.20) phosphors. Ba3Sr2.625Eu0.25B4O12 borate crystallizes new structure type (I4/mcm, 13.132(3), c 14.633(4) Å, V 2523.5(11) Å3, Z 8, R1 0.067). In structure, Ba/Sr(1) sites, which leads changes structure. Wyckoff letter occupancy O(5) are changed; B–O anion groups contain two BO3 triangles (B(3) B(4)), orientationally disordered over four orientations, ordered (B(1) B(2)) contrast Ba3Sr3B4O12, these 4 8 orientations. emission spectra show characteristic lines corresponding intraconfigurational 4f-4f transitions ions. Ba3Sr2.7Eu0.20B4O12 demonstrates strongest luminescent intensity among solutions. increase content results gradual change chromaticity light red orange-red/red. It concluded that promising phosphor.

Language: Английский

Robust luminescent material with superior color purity: Sm3+ ion-doped CaAl4O7 phosphor synthesized in a cost-effective approach for solid-state lighting applications DOI
Rajashree Panda, Mitrabhanu Behera,

Mahesha Hegde

et al.

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 409, P. 125441 - 125441

Published: July 5, 2024

Language: Английский

Citations

4
Manganese- and bismuth-containing phosphors based on MMeBO3 (M = Li, Na, K; Me = Mg, Ca, Sr, Ba, Zn) for white LEDs DOI Creative Commons
Т. Н. Хамаганова, А. В. Логвинова

Chimica Techno Acta, Journal Year: 2025, Volume and Issue: 12(2)

Published: Jan. 23, 2025

White light-emitting diodes (LEDs) are a new generation of light sources that used in solid-state lighting and information display devices. They generate less thermal radiation than incandescent fluorescent lamps. Phosphor light-emiting (PC-LEDs), which based on this technology, have high luminous efficiency energy efficiency; they compact havу long service life. LED materials subject to such requirements asenvironmental friendliness, transparency the source excitation process, color rendering efficiency. For use LEDs, it is necessary investigate optical properties inorganic doped not only with rare earth elements (due their cost) but also transition metal ions as Mn2+. This review summarizes analyses synthesis, structure, photoluminescent borates MMeBO3, where M = Li, Na, K; Me Mg, Ca, Sr, Ba, Zn Mn2+ Bi3+ co-doped metals (Ce3+, Eu3+). Impurity activators, when introduced into compound's lattice, become main luminescent centers phosphors. Processes transfer from sensitizer activator mechanisms discussed. The dependence size morphology particles materials' luminescence possibility using matrices for phosphors emitting red shown, along tunable white LEDs autoemission displays.

Language: Английский

Citations

0
Research on luminescent TPU composites based on selective lasering sintering DOI
Qiuyang Yu, Wei Wu, Junjian Ye

et al.

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 111908 - 111908

Published: Feb. 1, 2025

Language: Английский

Citations

0
Multifunction Materials Optoelectronic DOI Open Access
Krishna Srivastava, Prashant Kumar Mishra, Aakash Mathur

et al.

Multifunctional Materials, Journal Year: 2025, Volume and Issue: unknown, P. 295 - 333

Published: March 28, 2025

Language: Английский

Citations

0
Construction of thermally stable Tb3+-activated green-emitting phosphors: dual driving strategy of doping concentration and excitation wavelength DOI
Die Hu, Ran Xiao, Xiang Lv

et al.

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(11), P. 5202 - 5211

Published: Jan. 1, 2024

Different concentration gradient Tb 3+ ions are doped into GdTaO 4 to produce effective regulation of anti-thermal quenching performance, which has applications in solid-state lighting.

Language: Английский

Citations

3
Novel red-emitting SrBi2B4O10:Eu3+ phosphors: synthesis, crystal structure and luminescence DOI
A.P. Shablinskii, Alexey V. Povolotskiy, Р. С. Бубнова

et al.

Solid State Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 107853 - 107853

Published: Feb. 1, 2025

Language: Английский

Citations

0
Efficient, stable, broadband cyan‐emitting Ca‐substituted Ba9Lu2Si6O24:Eu2+ with multisite luminescence for NUV‐wLEDs DOI
Min Cao, Junhang Tian, Weidong Zhuang

et al.

Journal of the American Ceramic Society, Journal Year: 2023, Volume and Issue: 106(9), P. 5392 - 5402

Published: May 19, 2023

Abstract In order to develop an efficient and stable broadband cyan phosphor for full spectrum white lighting emitting diodes (wLEDs), novel Ba 9 Lu 2 Si 6 O 24 :Eu 2+ , xCa is designed synthesized. Ca‐substitution induces Eu ions into 3+ crystallographic site, which achieve rare nonequivalent cation substitution of . Effects on crystal structure matrix are investigated by X‐ray photoelectron spectroscopy, powder diffraction, transmission electron microscopy, density functional thoery (DFT). can be effectively excited with near‐ultraviolet (NUV) exhibit emission width at half maximum (FWHM) 119.7 nm x = 0.2, due the multisite luminescence centers. For sample internal quantum efficiency 92.61%, luminous intensity 423 K remains 89% that measured room temperature. The rigid [SiO4]‐[LuO6]‐[SiO4] doped Eu2+ ion makes Ca‐substituted samples excellent thermal stability. Our work develops a significant strategy based regulation explore NUV‐excited phosphors wLEDs.

Language: Английский

Citations

5
Charge Transfer and Charge Trapping Processes in Ca- or Al-Co-doped Lu2SiO5 and Lu2Si2O7 Scintillators Activated by Pr3+ or Ce3+ Ions DOI Open Access
V. V. Laguta, Lubomír Havlák, V. Babin

et al.

Materials, Journal Year: 2023, Volume and Issue: 16(12), P. 4488 - 4488

Published: June 20, 2023

Lutetium oxyorthosilicate Lu2SiO5 (LSO) and pyrosilicate Lu2Si2O7 (LPS) activated by Ce3+ or Pr3+ are known to be effective fast scintillation materials for the detection of X-rays γ-rays. Their performances can further improved co-doping with aliovalent ions. Herein, we investigate Ce3+(Pr3+) → Ce4+(Pr4+) conversion formation lattice defects stimulated Ca2+ Al3+ in LSO LPS powders prepared solid-state reaction process. The were studied electron paramagnetic resonance (EPR), radioluminescence spectroscopy, thermally luminescence (TSL), decays measured. EPR measurements both LSO:Ce LPS:Ce showed Ce4+ conversions co-doping, while effect was less effective. In Pr-doped LPS, a similar Pr4+ not detected EPR, suggesting that charge compensation ions is realized via other impurities and/or defects. X-ray irradiation creates hole centers attributed trapped an oxygen ion neighborhood Ca2+. These contribute intense TSL glow peak at 450–470 K. contrast only weak peaks no visible EPR. decay curves show bi-exponential slow component times 10–13 ns 30–36 ns, respectively. time shows small (6–8%) decrease due co-doping.

Language: Английский

Citations

4
Synthesis and optical properties of novel red-emitting phosphors Ba3Lu1–Eu B9O18 (x = 0–0.85) DOI
Y.P. Biryukov, Р. С. Бубнова, Alexey V. Povolotskiy

et al.

Ceramics International, Journal Year: 2023, Volume and Issue: 50(2), P. 3491 - 3496

Published: Nov. 10, 2023

Language: Английский

Citations

2
Novel “Anti-Zeolite” Ba3Sr3B4O12: Eu3+ Phosphors: Crystal Structure, Optical Properties, and Photoluminescence DOI Open Access
Р. С. Бубнова, A.P. Shablinskii, Alexey V. Povolotskiy

et al.

Symmetry, Journal Year: 2023, Volume and Issue: 15(7), P. 1399 - 1399

Published: July 11, 2023

Novel Ba3Sr3B4O12: Eu3+ phosphors were synthesized by crystallization from a melt. The crystal structures of Ba3(Sr3−1.5xEux)B4O12 (x = 0.03, 0.06, 0.15, 0.20, 0.25) solid solutions refined SCXRD data. can be described in terms the cationic sublattice and belong to “anti-zeolite” family borates. Its framework is constructed Ba Sr atoms. ions occupy Sr(1) extraframework site 0.01–0.20) phosphors. Ba3Sr2.625Eu0.25B4O12 borate crystallizes new structure type (I4/mcm, 13.132(3), c 14.633(4) Å, V 2523.5(11) Å3, Z 8, R1 0.067). In structure, Ba/Sr(1) sites, which leads changes structure. Wyckoff letter occupancy O(5) are changed; B–O anion groups contain two BO3 triangles (B(3) B(4)), orientationally disordered over four orientations, ordered (B(1) B(2)) contrast Ba3Sr3B4O12, these 4 8 orientations. emission spectra show characteristic lines corresponding intraconfigurational 4f-4f transitions ions. Ba3Sr2.7Eu0.20B4O12 demonstrates strongest luminescent intensity among solutions. increase content results gradual change chromaticity light red orange-red/red. It concluded that promising phosphor.

Language: Английский

Citations

1