Energy transfer mechanism and color-tunable luminescence properties of Eu3+-doped BaMg2V2O8 vanadate phosphors

Li, Hongwei; Fang, Minghao; Huang, Zhaohui; Liu, Yangai; Zhu, Hui; Zhang, Lina

doi:10.1016/j.cplett.2016.09.032

Cited by 28 publications

(5 citation statements)

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“…To further correlate the structure and luminescence properties of the La 2 Hf 2 O 7 NPs, we doped them with trivalent Eu 3+ ions to serve as the most preferred spectroscopic probe because of its nondegenerate ground state ( 7 F 0 ) and emissive state ( 5 D 0 ). Europium is known as an efficient red-emitting ion doped in various kinds of inorganic phosphors such as zirconate, aluminate, tungstate, vanadate, etc. − …”

Section: Introductionmentioning

confidence: 99%

Correlating Structure and Luminescence Properties of Undoped and Eu³⁺-Doped La₂Hf₂O₇ Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

et al. 2018

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Understanding the structure-property relationship and optimizing properties of phosphors for use in lighting and scintillation fields is an important materials challenge. In this work, we investigated the effects of the pH value of the coprecipitating solution adjusted by the concentration of NHOH(aq) on the structure and optical properties of the obtained LaHfO nanoparticles (NPs). The obtained NPs stabilize in the ideal pyrochlore structure, but the extent of ordering increased with an increase in the pH value used. The NPs prepared at pH = 12.1 displayed the best optical performance owing to the balance of the crystallinity, agglomeration, and surface defects. On the basis of density functional theory (DFT) calculations, the origin of violet-blue emission in undoped LaHfO NPs was attributed to defect states in the electronic band gap arising due to oxygen defects. For the LaHfO:Eu NPs, the Eu dopants possess low symmetry and their occupancy is more favorable at the LaO site. DFT calculations further justify the complete host-to-dopant energy transfer and origin of the most intense red emission observed experimentally. Understanding the interplay of the experimental and theoretical results thus is a very useful general approach for improving the efficiency of luminescent materials.

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Section: Introductionmentioning

confidence: 99%

Correlating Structure and Luminescence Properties of Undoped and Eu³⁺-Doped La₂Hf₂O₇ Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

et al. 2018

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“…Li et.al investigated the luminescent and color tuning properties of Eu 3+ doped BaMg2V2O8 and found it's potentiality in various applications [7]. In this work, we have explored the structural and luminescent properties of BaMg2V2O8 as well as Sm 3+ doped BaMg2V2O8 and investigated the color tuning property for the first time.…”

Section: Introductionmentioning

confidence: 97%

Spectroscopic investigation on color-tunable luminescence of Samarium doped BaMg2V2O8 phosphor

Jose¹,

Biju²

2023

Women in Optics and Photonics in India 2022

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Self-luminescent BaMg 2 V 2 O 8 and Sm 3+ doped BaMg 2 V 2 O 8 phosphors have been obtained by high temperature solid state reaction method. Detailed Structural and optical analyses were carried out and compare the result of pure and Sm doped samples for checking their suitability in various photonic applications. Broad emission band centered at 516 nm of BaMg2V 2 O 8 , under near UV excitation arises due to 3 T 1 → 1 A 1 and 3 T 2 → 2 A 1 transition of (VO4) 3and gives blue-green emission. Incorporation of Sm 3+ into the luminescent host lattice leads to the enhancement of the emission intensity and color tuning ability of the host. The CIE chromaticity coordinates for BaMg 2 V 2 O 8 give a blue green emission following the coordinates (x, y) as (0.29, 0.43) and for Sm 3+ doped BaMg 2 V 2 O 8 show the yellow emission following the coordinates (x, y) as (0.36, 0.41).

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“…De modo geral, o processo de transferência de energia resultante para as nanopartículas de (Y,Eu)VO4 decorre da absorção de energia UV pelo grupo vanadato e a subsequente transferência de energia para os íons Eu 3+ . Este processo pode ser simplificado utilizando o diagrama de Jablonski, como ilustrado na Figura 4 [24]. Em suma, o processo de excitação é decorrente da transferência de carga entre os íons O 2-→ V 5+ , que possuem absortividade molar maior em comparação ao do processo O 2-→ Eu 3+ .…”

Section: Propriedades Espectroscópicas Do (Yeu)vo4unclassified

“…Primeiramente, ocorre a absorção de energia (hνex), proveniente da luz UV, pelo grupo VO4 3e, subsequentemente, ocorrem as transições 1 A1← 1 T1 e 1 A1←1T2, que se referem, respectivamente, as transferências de carga entre O 2-→ V 5+ e O 2-→ Eu 3+ . A transferência de energia sucede entre os estados excitados do VO4 3para os estados excitados do Eu 3+ seguido das transições típicas 5 D0→ 7 FJ do Eu 3+ , com J=0 a 6 [24,25]. em tratamentos com cisplatina [26].…”

Section: Propriedades Espectroscópicas Do (Yeu)vo4unclassified

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Guida¹

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Aos meu pais Adriana e Ricardo, que nunca deixaram de acreditar em meu potencial, por todos os conselhos e apoio. Sempre serei grata a vocês! Vocês são e sempre serão minha admiração. Agradeço imensamente ao prof. Paulo Cesar por ter me cedido um espaço em seu grupo de pesquisa. Obrigada pelo ensino e paciência durante estes dois anos! Agradeço aos amigos cultivados durante este tempo, Rafael, Milena, Giulia e Gustavo. Estar no laboratório todos os dias com vocês sempre foi divertido. Obrigada por todas as conversas, conselhos e ajuda para as discussões deste trabalho! À minha irmã Carolina, por todo o apoio e amor. Você sempre foi essencial em todos os momentos, obrigada por ser presente em todos estes anos! Aos meus amigos Lucas, Dominique e Marina, que mesmo longe, sempre foram muito presentes em minha vida. Obrigada por todas as risadas, brincadeiras e pela sincera amizade, meu muito obrigada. Amo vocês! Um agradecimento especial a minha avó Nereide, que sempre orou por mim, apoiou e incentivou a fé para não desistir. As incríveis pessoas que conheci em Campinas, em especial a Ya e Caio, pela imensa amizade, paciência, conselhos e abraços que me ajudaram, e tanto, durante todo este tempo. Me sinto imensamente abençoada por ter vocês em minha vida. Agradeço a todos do IQ/UNICAMP, em especial ao LQES por ter disponibilizado o ASAP para análises. Agradeço a CNPq pela bolsa concedida (processo n° 134526/2017-1). Agradeço a FAPESP pelo auxílio concedido para estágio na Universidade de Warwick (SPRINT-FAPESP 2018/08334-9).

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Energy transfer mechanism and color-tunable luminescence properties of Eu3+-doped BaMg2V2O8 vanadate phosphors

Cited by 28 publications

References 24 publications

Correlating Structure and Luminescence Properties of Undoped and Eu³⁺-Doped La₂Hf₂O₇ Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

Correlating Structure and Luminescence Properties of Undoped and Eu³⁺-Doped La₂Hf₂O₇ Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

Spectroscopic investigation on color-tunable luminescence of Samarium doped BaMg2V2O8 phosphor

Síntese de nanopartículas luminescentes de vanadatos de terras raras via templates coloidais

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Energy transfer mechanism and color-tunable luminescence properties of Eu3+-doped BaMg2V2O8 vanadate phosphors

Cited by 28 publications

References 24 publications

Correlating Structure and Luminescence Properties of Undoped and Eu3+-Doped La2Hf2O7 Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

Correlating Structure and Luminescence Properties of Undoped and Eu3+-Doped La2Hf2O7 Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

Spectroscopic investigation on color-tunable luminescence of Samarium doped BaMg2V2O8 phosphor

Síntese de nanopartículas luminescentes de vanadatos de terras raras via templates coloidais

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Product

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Correlating Structure and Luminescence Properties of Undoped and Eu³⁺-Doped La₂Hf₂O₇ Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies

Correlating Structure and Luminescence Properties of Undoped and Eu³⁺-Doped La₂Hf₂O₇ Nanoparticles Prepared with Different Coprecipitating pH Values through Experimental and Theoretical Studies