White light upconversion emission and color tunability in Er3+/Tm3+/Yb3+ tri-doped YNbO4 phosphor

Carmo, F. F. do; Nascimento, João Paulo Costa do; Façanha, Marcello X.; Sales, Tasso O.; Santos, W.Q.; Gouveia‐Neto, A. S.; Jacinto, Carlos; Sombra, A. S. B.

doi:10.1016/j.jlumin.2018.08.079

Cited by 39 publications

(5 citation statements)

References 44 publications

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“…In this case, the willingly studied pathway for generation a white light is related to the mixing of three primary colors-red, green and blue (RGB)-in optical materials. Such red-green-blue multicolor visible light can be achieved via up-conversion of near-infrared radiation (NIR) [3][4][5][6][7] or via the conversion of near-ultraviolet (NUV) photons [8][9][10]. Since rare-earth ions (RE 3+ ) exhibit a broad range of emission in the visible (VIS) spectral scope via interactions with NIR and NUV irradiation, they are considered as essential parts in the development of white-light-emitting RGB materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

Energy Transfer Study on Tb3+/Eu3+ Co-Activated Sol-Gel Glass-Ceramic Materials Containing MF3 (M = Y, La) Nanocrystals for NUV Optoelectronic Devices

2020

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In the present work, the Tb3+/Eu3+ co-activated sol-gel glass-ceramic materials (GCs) containing MF3 (M = Y, La) nanocrystals were fabricated during controlled heat-treatment of silicate xerogels at 350 °C. The studies of Tb3+ → Eu3+ energy transfer process (ET) were performed by excitation and emission spectra along with luminescence decay analysis. The co-activated xerogels and GCs exhibit multicolor emission originated from 4fn–4fn optical transitions of Tb3+ (5D4 → 7FJ, J = 6–3) as well as Eu3+ ions (5D0 → 7FJ, J = 0–4). Based on recorded decay curves, it was found that there is a significant prolongation in luminescence lifetimes of the 5D4 (Tb3+) and the 5D0 (Eu3+) levels after the controlled heat-treatment of xerogels. Moreover, for both types of prepared GCs, an increase in ET efficiency was also observed (from ηET ≈ 16% for xerogels up to ηET = 37.3% for SiO2-YF3 GCs and ηET = 60.8% for SiO2-LaF3 GCs). The changes in photoluminescence behavior of rare-earth (RE3+) dopants clearly evidenced their partial segregation inside low-phonon energy fluoride environment. The obtained results suggest that prepared SiO2-MF3:Tb3+, Eu3+ GC materials could be considered for use as optical elements in RGB-lighting optoelectronic devices operating under near-ultraviolet (NUV) excitation.

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Section: Introductionmentioning

confidence: 99%

Energy Transfer Study on Tb3+/Eu3+ Co-Activated Sol-Gel Glass-Ceramic Materials Containing MF3 (M = Y, La) Nanocrystals for NUV Optoelectronic Devices

2020

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“…Blue (462 nm: 1 D 2 → 3 F 4 and 484 nm: 1 G 4 → 3 H 6 of the Tm 3+ ion), green (531 nm: 2 H1 1/2 → 4 I 15/2 and 553 nm: 4 S 3/2 → 4 I 15/2 of the Er 3+ ion), and red (659 nm: 1 G 4 → 3 F 4 of the Tm 3+ ion, 666 nm: 4 F 9/2 → 4 I1 5/2 of the Er 3+ ion, and 678 nm: 3 F 2 → 3 H 6 of the Tm 3+ ion) emissions were successfully obtained from the UC emission spectra of α-NiMoO 4 :Yb 3+ /Er 3+ /Tm 3+ (15/0.25-0.75/0.50 mol %) nanoparticles in the wavelength range of 450-700 nm upon 980 nm excitation at room temperature [9,11,27,[32][33][34][35] (figure 8). By increasing the dopant concentration of the Er 3+ ion, the green and red intensities first increase and reach the maximum at 0.50 mol% of Er 3+ ions, which was followed by their decrease because of the concentration quenching effect.…”

Section: Ucl Propertiesmentioning

confidence: 96%

White-light emission in Yb³⁺/Er³⁺/Tm³⁺- and Yb³⁺/Er³⁺/Tm³⁺/Ho³⁺-doped α-NiMoO₄ nanoparticles

2022

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Yb3+/Er3+/Tm3+ and Yb3+/Er3+/Tm3+/Ho3+ doped α-NiMoO4 nanoparticleswere synthesized by microwave hydrothermal method and studied for white light emission under 980 nm laser diode excitation. White upconversion (UC) light was successfully obtained with the appropriate control of blue, green, and red emissions via successfully tuning Er3+ and Ho3+ concentration in Yb3+/Er3+/Tm3+ and Yb3+/Er3+/Tm3+/Ho3+ doped α-NiMoO4, respectively. In addition, the white color emission was also shown by the CIE chromaticity coordinates of samples. The energy transfer mechanisms were explained in detail based on emission spectra and pump power density-dependent UC luminescence intensity in rare earth (Yb3+/Er3+/Tm3+ and Yb3+/Er3+/Tm3+/Ho3+) doped α-NiMoO4 nanoparticles. The results indicate thatYb3+/Er3+/Tm3+ and Yb3+/Er3+/Tm3+/Ho3+ doped α-NiMoO4 nanoparticles can be good candidates for white light device.

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“…Com a introdução de 2mol% de Li + , a intensidade das emissões vermelha, verde e azul diminui de aproximadamente 2,1, 2,4 e 2,0 vezes, respectivamente. Devido ao ajuste decorrente desses decréscimos desiguais de intensidade, o fósforo BBN2LTEY atinge uma proporção X:Y:Z de 0,946:1,000:0,960 (Figura 65b) que é muito próxima daquela da luz branca padrão no iluminante D65 (0,950:1,000:1,088) (DO CARMO et al, 2018).…”

Section: Coordenadas Cromáticas Temperatura De Cor Correlata E Pureza...unclassified

Propriedades fotoluminescentes da matriz cerâmica BaBi2Nb2O9 (BBN) tri-dopada com Er3+/Tm3+/Yb3+

FAÇANHA¹

2022

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AGRADECIMENTOSÀ CAPES, pelo apoio financeiro com a manutenção da bolsa de auxílio.À Universidade Federal do Ceará pelo suporte fornecido para minha formação nos cursos de graduação, mestrado e doutorado.Ao professor Dr. Antonio Sergio Bezerra Sombra pelo suporte, orientação, e incentivo na realização desse trabalho.Ao laboratório de Difração de Raios-X da UFC pelas medidas realizadas.A todos os integrantes da Central Analítica -UFC pelas análises de MEV.

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White light upconversion emission and color tunability in Er3+/Tm3+/Yb3+ tri-doped YNbO4 phosphor

Cited by 39 publications

References 44 publications

Energy Transfer Study on Tb3+/Eu3+ Co-Activated Sol-Gel Glass-Ceramic Materials Containing MF3 (M = Y, La) Nanocrystals for NUV Optoelectronic Devices

Energy Transfer Study on Tb3+/Eu3+ Co-Activated Sol-Gel Glass-Ceramic Materials Containing MF3 (M = Y, La) Nanocrystals for NUV Optoelectronic Devices

White-light emission in Yb³⁺/Er³⁺/Tm³⁺- and Yb³⁺/Er³⁺/Tm³⁺/Ho³⁺-doped α-NiMoO₄ nanoparticles

Propriedades fotoluminescentes da matriz cerâmica BaBi2Nb2O9 (BBN) tri-dopada com Er3+/Tm3+/Yb3+

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White light upconversion emission and color tunability in Er3+/Tm3+/Yb3+ tri-doped YNbO4 phosphor

Cited by 39 publications

References 44 publications

Energy Transfer Study on Tb3+/Eu3+ Co-Activated Sol-Gel Glass-Ceramic Materials Containing MF3 (M = Y, La) Nanocrystals for NUV Optoelectronic Devices

Energy Transfer Study on Tb3+/Eu3+ Co-Activated Sol-Gel Glass-Ceramic Materials Containing MF3 (M = Y, La) Nanocrystals for NUV Optoelectronic Devices

White-light emission in Yb3+/Er3+/Tm3+- and Yb3+/Er3+/Tm3+/Ho3+-doped α-NiMoO4 nanoparticles

Propriedades fotoluminescentes da matriz cerâmica BaBi2Nb2O9 (BBN) tri-dopada com Er3+/Tm3+/Yb3+

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White-light emission in Yb³⁺/Er³⁺/Tm³⁺- and Yb³⁺/Er³⁺/Tm³⁺/Ho³⁺-doped α-NiMoO₄ nanoparticles