Synthesis and luminescence properties of Li+, Bi3+ ions co-doped CaSiO3:Eu3+ red emitting phosphors

Liang, Chunping; Huang, Xuefei; Huang, Weigang

doi:10.1007/s10854-018-9214-x

Cited by 9 publications

(4 citation statements)

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“…35 The emission band intensity at $588, 594, and 600 nm is ascribed to the magnetic dipole transition of 5 D 0 / 7 F 1 at 8b crystallographic cation site and S 6 (C 3i ) (centrosymmetric) symmetry of Y 2 O 3 (25%) host lattice. 36 The most prominent red emission band at 612 nm and a small band at 632 nm were attributed to the 5 to the shielding effect of 4f electrons by 5s and 5p in the outer shell in the Eu 3+ ion. 40 By observing all the red emission bands under various excitations were varies with different Li + codoping concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, Eu 3+ doped phosphors are used to produce blue, green, and red luminescence efficiently based on various host materials. 5 The Eu 3+ ion exhibits a prominent red emission band due to the 5 D 0 / 7 F 2 transition at about 612 nm and is used as a red component for white LED fabrication. 6 Because of the special character, Eu 3+ ion has been widely used as an activator in different nanophosphors.…”

Section: Introductionmentioning

confidence: 99%

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The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs

2020

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs

2020

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“…In order to eliminate such defects in the host material and improve the luminescence intensity, ions Na + or Li + can be doped in the Tb 3+ /Sm 3+ co-doped CaSiO 3 phosphors to make the charge balance in the host materials. As a result, the luminescent efficiency of phosphors can be improved [48,49]. Another way for improving the PL properties of the phosphors is to improve their particle morphology through other phosphor synthesis methods such as combustion [50] or citrate gel methods [51].…”

Section: Resultsmentioning

confidence: 99%

Study on luminescent properties of Tb³⁺ and Sm³⁺ co-doped CaSiO₃ phosphors for white light emitting diodes

Khan

Dang

Jabarov

et al. 2019

Mater. Res. Express

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A series of CaSiO 3 :x%Tb 3+ , y%Sm 3+ compounds was synthesized by the conventional solid state reaction. X-ray diffraction, scanning electron microscopy, and energy dispersive x-ray spectroscopy investigations were conducted to determine crystal structure. The photoluminescence (PL) excitation spectrum of Tb 3+ and Sm 3+ doped compounds consists of a series of peaks corresponding to electronic transitions of Tb 3+ and Sm 3+ ions. The wavelength of 375 nm was optimal to excite the luminescence of Tb 3+ /Sm 3+ co-doped compounds. The PL emission spectrum consists of a set of intense lines at wavelengths of 415 nm, 436 nm, 457 nm, 488 nm, 543 nm, 586 nm, and 622 nm, corresponding to Tb 3+ electronic transitions of 5 D , respectively. The PL emission spectrum of the Sm 3+ doped compound has a series of three peaks located at wavelengths of 565 nm, 602 nm, and 648 nm, corresponding to the electronic transitions of Sm 3+ from 4 G 5/2 to 6 H 5/2 , 6 H 7/2 , and 6 H 9/2 , respectively. The energy level diagram was proposed. The lifetime measurements were conducted for all samples and energy transfer process was also examined by this way. The Commission Internationale de I'Eclairage chromaticity coordinates, correlated color temperature, and color rendering index of phosphors were determined and the results indicate that the obtained materials are optimal candidate for white LED applications.

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“…. In the last years, CaSiO 3 , doped or not, has received great attention because of its luminescence properties and the sensitivity shown for gamma radiation[103,[116][117][118][119][120]. Bailiff and collaborates[121] have studied the use of calcium silicate bricks from the populated settlement of Narodychi in Ukraine for retrospective dosimetry.Souza et.…”

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Production of synthetic polycrystals of CaSiO3 and their study as new detectors of gamma radiation, thermal neutrons and accelerated ions.

Lorenzo¹

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Em especial ao prof. Shigueo Watanabe pela sua orientação, paciência, disposição e apoio no desenvolvimento deste trabalho, incentivando a maioria das minhas decisões, agradeço muito. Ao Conselho Nacional de desenvolvimento Científico e Tecnológico (CNPq) pelo apoio financeiro. À Eng. Elizabeth Ribeiro Somessari, ao Eng. Carlos Gaia da Silveira do CTR-IPEN-SP; ao Aldo Oliveira e Vicente de Paulo Campos do GMR-IPEN-SP pelas inúmeras vezes que nos atenderam gentilmente para as irradiações gama realizadas neste trabalho. À Professora Carmen Cecilia Bueno do Centro de Tecnologia das Radiações-IPEN pela ajuda nas irradiações com nêutrons no reator nuclear de pesquisa IEA-R1 do IPEN. Ao Prof. Gundu Rao pela análise das medidas de EPR as quais ajudaram muito no aprimoramento do presente trabalho, e pela ajuda na revisão do inglês. Ao prof. Satoshi Kodaira do Instituto Nacional de Ciências Radiológicas (NIRS) em Chiba-Japão e à Dra. Luana Nascimento do Centro Belga de Pesquisa Nuclear (SCK•CEN) pela ajuda nas irradiações das nossas amostras com prótons e íons de carbono no NIRS. Ao Prof. Sergey Nikiforov e à colega Daria Ananchenko do Instituto de Física e Tecnologia da Universidade Federal dos Urais em Ecaterimburgo-Rússia por me aceitar no seu laboratório como parte de um estágio de pesquisa. ii Ao Dr. Tássio A. Cavalieri do Centro de Engenharia Nuclear do Instituto de Pesquisas Energéticas e Nucleares (CEN-IPEN-SP) pela importante colaboração e ajuda com as simulações de Monte Carlo. À Nancy Kuniko Umisedo do Laboratório de Dosimetria do IFUSP pelas irradiações com raios X. Aos Professores Nilo Cano, René Rojas e Fernando Chubaci pela paciência, compreensão e pela sua disponibilidade para responder às minhas dúvidas no desenvolvimento deste trabalho. À Dra. Roseli Gennari pela ajuda na mistura das amostras e pelas sugestões na produção dos policristais usados neste trabalho. À Edna Toledo pela ajuda e disposição nos processos burocráticos e os muitos momentos agradáveis na hora do café no LACIFID.

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Synthesis and luminescence properties of Li+, Bi3+ ions co-doped CaSiO3:Eu3+ red emitting phosphors

Cited by 9 publications

References 37 publications

The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs

The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs

Study on luminescent properties of Tb³⁺ and Sm³⁺ co-doped CaSiO₃ phosphors for white light emitting diodes

Production of synthetic polycrystals of CaSiO3 and their study as new detectors of gamma radiation, thermal neutrons and accelerated ions.

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Synthesis and luminescence properties of Li+, Bi3+ ions co-doped CaSiO3:Eu3+ red emitting phosphors

Cited by 9 publications

References 37 publications

The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs

The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs

Study on luminescent properties of Tb3+ and Sm3+ co-doped CaSiO3 phosphors for white light emitting diodes

Production of synthetic polycrystals of CaSiO3 and their study as new detectors of gamma radiation, thermal neutrons and accelerated ions.

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Study on luminescent properties of Tb³⁺ and Sm³⁺ co-doped CaSiO₃ phosphors for white light emitting diodes