Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route

Bispo‐Jr, Airton G.; Lima, Sergio A. M.; Pires, Ana Maria

doi:10.1016/j.jlumin.2018.03.057

Cited by 27 publications

(10 citation statements)

References 35 publications

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“…The ET values vary depending on the matrix and the co-doped ion. For comparison, for other proposed sensitizers for Eu 3+ , an ET of 68% was obtained for Tm 3+ →Eu 3+ in Li-LaSiO4:Tm 3+ , Eu 3+ [56]; 78% for Tb 3+ →Eu 3+ in Ba2SiO4 [57]; or 17% for Sm 3+ →Eu 3+ on TeO2−GeO2-ZnO glasses [24].…”

Section: Photoluminescence Studymentioning

confidence: 97%

“…The ET values vary depending on the matrix and the co-doped ion. For comparison, for other proposed sensitizers for Eu 3+ , an ET of 68% was obtained for Tm 3+ →Eu 3+ in LiLaSiO 4 :Tm 3+ , Eu 3+ [56]; 78% for Tb 3+ →Eu 3+ in Ba 2 SiO 4 [57]; or 17% for Sm 3+ →Eu 3+ on TeO 2− GeO 2− ZnO glasses [24]. On the other hand, the energy transfer from the sensitizers to the activators could be achieved through electric multipole interactions.…”

Section: Photoluminescence Studymentioning

confidence: 99%

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Luminescence Properties and Energy Transfer of Eu3+, Bi3+ Co-Doped LuVO4 Films Modified with Pluronic F-127 Obtained by Sol–Gel

et al. 2022

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Nowadays, orthovanadates are studied because of their unique properties for optoelectronic applications. In this work, the LuVO4:Eu3+, Bi3+ films were prepared by the sol–gel method, using a new simple route, and deposited by the dip-coating technique. The obtained films are transparent, fracture-free, and homogenous. The sol–gel process was monitored by Fourier-transform infrared spectroscopy (FTIR), and according to X-ray diffraction (XRD) results, the crystal structure was tetragonal, and films that were highly oriented along the (200) low-energy direction were obtained. The morphological studies by scanning electron microscopy (SEM) showed uniformly distributed circular agglomerations of rice-like particles with nanometric sizes. The luminescence properties of the films were analyzed using a fixed concentration of 2.5 at. % Eu3+ and different concentrations of Bi3+ (0.5, 1.0, and 1.5 at. %); all the samples emit in red, and it has been observed that the light yield of Eu3+ is enhanced as the Bi3+ content increases when the films are excited at 350 nm, which corresponds to the 1S0→3P1 transition of Bi3+. Therefore, a highly efficient energy transfer mechanism between Bi3+ and Eu3+ has been observed, reaching up to 71%. Finally, it was established that this energy transfer process occurs via a quadrupole–quadrupole interaction.

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Section: Photoluminescence Studymentioning

confidence: 97%

Section: Photoluminescence Studymentioning

confidence: 99%

Luminescence Properties and Energy Transfer of Eu3+, Bi3+ Co-Doped LuVO4 Films Modified with Pluronic F-127 Obtained by Sol–Gel

et al. 2022

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“…Different excitation wavelengths were used by various researchers while investigating the Tb 3+* → Eu 3+ energy transfer. ,,,− For example, in some cases, the host moiety is excited, while in others, this interaction is studied by directly exciting one of the Tb 3+ direct bands. A wide range of excitation energies indicate the involvement of different initially excited electronic energy levels in investigating the inter-Ln 3+ interactions.…”

Section: Introductionmentioning

confidence: 99%

Maximizing Terbium–Europium Electronic Interaction: Insight from Variation of Excitation Energy

2023

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This work investigates the tuning of electronic interaction between excited Tb3+ (Tb3+*) and Eu3+ by varying the excitation wavelengths, which consist of different electronic origins spanning the entire range of excitation spectra. Direct excitation bands of trivalent lanthanide cations (Ln3+) are accessed in the Ln-doped calcium fluoride, Ca(Ln)F2, nanoparticles (NPs). The experimental outcomes from the NPs are compared to that in the bulk solvent with freely floating entities. Remarkable excitation wavelength-dependent Tb3+–Eu3+ electronic interaction is observed in the NPs, with 370 nm excitation of Tb3+ being found to provide the optimum energy to maximize the Eu3+ emission. This excitation energy dependence is found to be less prominent in the bulk medium. Different mechanisms for Tb3+–Eu3+ electronic interaction are argued to be operative in the confined NP and bulk environments. The energy transfer efficiency from Tb3+* to Eu3+ in NPs can be maximized by (i) sole excitation of Tb3+ and (ii) maintaining the energy difference between the excitation energy and the Eu2+ ground energy level in the range of 4500–7500 cm–1. Additionally, we suggest the necessity of concomitant consideration of the steady-state and time-resolved response of both Tb3+ and Eu3+ emissions to decipher the Tb3+* → Eu3+ electronic interactions, instead of considering a single parameter to gauge such a process. These findings collectively provide important insights to design Tb–Eu-containing luminophores for their potential use in multiplex assays.

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“…Ba 2 SiO 4 has orthorhombic structure and P nam space group [13]. Recently, we have published the successful sol-gel synthesis of a silica xerogel containing Ba 2+ and Eu 3+ ions [14] which can also act as precursor to obtain Ba 2 SiO 4 :Eu 3+ red phosphors [15,16]. Besides the red strong emission, Eu 3+ ions can easily be quenched by CO 2 or H 2 O molecules, so the use of a protector as a polymeric matrix is a simple alternative to enhance the Eu 3+ phosphor emission [17].…”

Section: Introductionmentioning

confidence: 99%

Red-light-emitting polymer composite based on PVDF membranes and Europium phosphor using Buriti Oil as plasticizer

Bispo‐Jr

Oliveira

Cardoso

et al. 2018

Materials Chemistry and Physics

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Energy transfer between terbium and europium ions in barium orthosilicate phosphors obtained from sol-gel route

Cited by 27 publications

References 35 publications

Luminescence Properties and Energy Transfer of Eu3+, Bi3+ Co-Doped LuVO4 Films Modified with Pluronic F-127 Obtained by Sol–Gel

Luminescence Properties and Energy Transfer of Eu3+, Bi3+ Co-Doped LuVO4 Films Modified with Pluronic F-127 Obtained by Sol–Gel

Maximizing Terbium–Europium Electronic Interaction: Insight from Variation of Excitation Energy

Red-light-emitting polymer composite based on PVDF membranes and Europium phosphor using Buriti Oil as plasticizer

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