Novel bismuth silicate based upconversion phosphors: Facile synthesis, structure, luminescence properties, and applications

Zhang, Lei; Wang, Guojing; Lu, Yaxian; Zhang, Fangbo; Jia, Guang; Zhang, Cuimiao

doi:10.1016/j.jlumin.2019.116718

Cited by 15 publications

(3 citation statements)

References 47 publications

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“…As disclosed, there are several bands in the recorded curve. Particularly, the two intense bands at 3441 and 1625 cm –1 are attributed to the O–H stretching vibration, whereas the H–O–H blending vibration corresponds to the vibrational band at around 1388 cm –1 . Aside from these bands, we also observe another two peaks at 2357 and 1038 cm –1 , which originate from featured absorption peaks of ethylene glycol .…”

Section: Resultsmentioning

confidence: 73%

“…Particularly, the two intense bands at 3441 and 1625 cm −1 are attributed to the O− H stretching vibration, whereas the H−O−H blending vibration corresponds to the vibrational band at around 1388 cm −1 . 30 Aside from these bands, we also observe another two peaks at 2357 and 1038 cm −1 , which originate from featured absorption peaks of ethylene glycol. 31 Notably, the peak at 2357 cm −1 is associated with the CH 2 group asymmetric stretching vibration, and the band at 1038 cm −1 is ascribed to the stretching mode of C−O.…”

Section: Resultsmentioning

confidence: 99%

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Thermally Stable Tb³⁺/Eu³⁺-Codoped K_0.3Bi_0.7F_2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Wan

Luo

et al. 2021

ACS Appl. Nano Mater.

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A new series of Tb 3+ -doped and Tb 3+ /Eu 3+codoped K 0.3 Bi 0.7 F 2.4 nanoparticles were rapidly synthesized at low temperature. Upon near-ultraviolet light excitation, the Tb 3+doped K 0.3 Bi 0.7 F 2.4 nanoparticles emit Tb 3+ ions' emission and the intensity is sensitive to the Tb 3+ ion concentration, in which the optimal doping content is 9 mol %. Moreover, under 376 nm irradiation, dazzling color-tunable (i.e., from green to yellow and finally to red) emissions are gained in the Tb 3+ /Eu 3+ -codoped K 0.3 Bi 0.7 F 2.4 nanoparticles with the increasing Eu 3+ ion content owing to the efficient energy transfer (ET) between Tb 3+ and Eu 3+ ions. Through theoretical analysis based on the recorded emission spectra and decay time, one knows that the ET in the resultant nanoparticle is efficient and its mechanism is dominated by dipole−dipole interaction. Furthermore, the internal and external quantum efficiencies of the final products are as high as 50.8 and 15.5%, respectively. Aside from the satisfactory photoluminescent behaviors, the developed nanoparticles also exhibit splendid thermal stability, in which the activation energies of Tb 3+ and Eu 3+ ions in the selected host are 0.26 and 0.23 eV, respectively. Additionally, via the use of the resultant nanoparticles acting as yellowemitting components, we packaged a white-light-emitting diode (LED), which is able to emit glaring white light with an appropriate corrected color temperature (5854 K) and high color-rendering index (90.1). These findings imply that Tb 3+ /Eu 3+ -codoped K 0.3 Bi 0.7 F 2.4 nanoparticles may serve as potential multicolor-emitting converters for white-LED applications.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Thermally Stable Tb³⁺/Eu³⁺-Codoped K_0.3Bi_0.7F_2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Wan

Luo

et al. 2021

ACS Appl. Nano Mater.

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“…The latter bismuth silicates (BSOs) are attractive materials for a number of applications, such as sensors [1], capacitors [2,3], nanothermometers [4,5], acoustic devices and optical devices [6,7], fuel-cells [8], spatial light modulators [9], holographic grafting recorders [10], etc. Moreover, Bi-Si-O based materials find their application as bioactive materials [11], luminescent materials [12,13], and photocatalysts [14,15].…”

Section: Introductionmentioning

confidence: 99%

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

et al. 2022

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Laser methods are successfully used to prepare complex functional nanomaterials, especially for biomedicine, optoelectronics, and heterogeneous catalysis. In this paper, we present complex oxide and composite nanomaterials based on Bi and Si produced using laser ablation in liquid followed by subsequent powder annealing. Two synthesis approaches were used, with and without laser post-treatment of mixed (in an atomic ratio of 2:1) laser-generated Bi and Si colloids. A range of methods were used to characterize the samples: UV-Vis diffusion reflection, IR and Raman spectroscopy, synchronous thermal analysis, X-ray diffraction, transmission electron microscopy, as well as specific surface-area evaluation. We also followed the dynamics of phase transformations, as well as composition, structure and morphology of annealed powders up to 800 °C. When heated, the non-irradiated series of samples proceeded from metallic bismuth, through β-Bi2O3, and resulted in bismuth silicates of various stoichiometries. At the same time, in their laser-irradiated counterparts, the formation of silicates proceeded immediately from the amorphous Bi2SiO5 phase formed after laser treatment of mixed Bi and Si colloids. Finally, we show their ability to decompose persistent organic molecules of Rhodamine B and phenol under irradiation with a soft UV (375 nm) source.

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Investigation of luminescence spectroscopic characteristics in Eu3+-doped Zn2SiO4 by Judd–Ofelt parameters

Prathibha

Krishna

Nagesh

et al. 2021

J Mater Sci: Mater Electron

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Novel bismuth silicate based upconversion phosphors: Facile synthesis, structure, luminescence properties, and applications

Cited by 15 publications

References 47 publications

Thermally Stable Tb³⁺/Eu³⁺-Codoped K_0.3Bi_0.7F_2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Thermally Stable Tb³⁺/Eu³⁺-Codoped K_0.3Bi_0.7F_2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

Investigation of luminescence spectroscopic characteristics in Eu3+-doped Zn2SiO4 by Judd–Ofelt parameters

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Novel bismuth silicate based upconversion phosphors: Facile synthesis, structure, luminescence properties, and applications

Cited by 15 publications

References 47 publications

Thermally Stable Tb3+/Eu3+-Codoped K0.3Bi0.7F2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Thermally Stable Tb3+/Eu3+-Codoped K0.3Bi0.7F2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Phase and Structural Thermal Evolution of Bi–Si–O Catalysts Obtained via Laser Ablation

Investigation of luminescence spectroscopic characteristics in Eu3+-doped Zn2SiO4 by Judd–Ofelt parameters

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Product

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Thermally Stable Tb³⁺/Eu³⁺-Codoped K_0.3Bi_0.7F_2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes

Thermally Stable Tb³⁺/Eu³⁺-Codoped K_0.3Bi_0.7F_2.4 Nanoparticles with Multicolor Luminescence for White-Light-Emitting Diodes