Original KGd2F7 nanocrystals in fluoro-oxide glass ceramics by Dy3+/Sm3+ co-doped for white light emission

Ye, Guoquan; Fang, Li‐Zhi; Xiong, Zuhong; Xia, Haiping; Song, Hongwei; Chen, Baojiu

doi:10.1016/j.jallcom.2022.165126

Cited by 19 publications

(8 citation statements)

References 30 publications

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“…In the transmittance aspect, the highest transmittance of our work can reach 88%, higher than almost all the PIG method luminescent glass. In the QY aspect, recently reported no matter whether quantum dot NC 31,37 glass or other systems are lower than 32%, 39–41 Sample A of this work can reach a better performance at 36.02%. In addition, the CRI is 71.2.…”

Section: Resultsmentioning

confidence: 64%

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu³⁺ to Eu²⁺ with Si₃N₄

Huang

Yuan

et al. 2022

J Am Ceram Soc.

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Rare-earth-doped transparent glass shows great potential in white light-emitting diodes (wLEDs) application due to its excellent optical and luminous properties. Currently reported commercial wLEDs have a drawback in red emission missing, which leads to a relatively low color rendering index (CRI) and a relatively high correlated color temperature (CCT). In this work, Ce@Eu Sr-Si-O glass is fabricated using a high-temperature quenching method. The white light is available when the ratio of Ce 3+ /Eu 3+ equals 1, and the emitting color can be adjusted from blue to red by controlling the ratio of Ce 3+ /Eu 3+ . To further optimize the white light, Eu 3+ ions can be reduced to Eu 2+ according to the reaction of 6Eu 3+ + 2N 3− → 6Eu 2+ + N 2 ↑ by introducing Si 3 N 4 . As a result, the standard white light emission can be achieved in the Ce@Eu silicate glass contributed by the blue light from Ce 3+ , red light from Eu 3+ , and yellow-green light from Eu 2+ (two elements, three emission). This glass shows excellent luminous properties, such as a color coordinate is (0.3651, 0.3269) in CIE 1931 color coordinate diagram, a CRI is over 70, a high quantum yield of 36.02%, and a CCT of 4117 K.

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Section: Resultsmentioning

confidence: 64%

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu³⁺ to Eu²⁺ with Si₃N₄

Huang

Yuan

et al. 2022

J Am Ceram Soc.

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“…31,32,[38][39][40][41] Ye et al successfully synthesized glass-ceramics with Dy 3+ /Sm 3+ co-doping and KGd 2 F 7 nanocrystals through a hightemperature melt quenching method, where energy transfer was demonstrated. 19 Chen et al 30 prepared a transparent glass-ceramic material that contained Na 5 Y 9 F 32 nanocrystals. The introduction of Dy 3+ and Sm 3+ doping allowed for the control of emission color in the material, ranging from yellow to white by adjusting the quantity of Sm 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

“…Ye et al. successfully synthesized glass–ceramics with Dy 3+ /Sm 3+ co‐doping and KGd 2 F 7 nanocrystals through a high‐temperature melt quenching method, where energy transfer was demonstrated 19 . Chen et al 30 .…”

Section: Introductionmentioning

confidence: 99%

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Tong,

Luo,

Liu

et al. 2024

J Am Ceram Soc.

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The transparent glass–ceramics with Dy3+ and/or Sm3+ doping, which include the NaGd(MoO4)2 single‐crystal phase, were synthesized using the melt‐quenching method followed by heat treatment in the SiO2–B2O3–Na2O–ZnO–MoO3–Gd2O3 system. The formation and fluorescent properties of Dy3+ single‐doped precursor glasses were thoroughly examined, and the optimal doping amount of Dy2O3 was determined to be 0.3 mol% by fluorescence spectroscopy. The ideal heat treatment procedure for glass–ceramics containing Dy3+ and Sm3+ was determined to be crystallized at a temperature of 650°C for a duration of 7 h. After undergoing heat treatment, the luminescence performance of glass–ceramic is significantly boosted, exhibiting an improvement that is roughly twice as substantial when compared to the precursor glass. Extensive research has been conducted to thoroughly examine the fluorescence capabilities of glass–ceramics doped with both Dy3+ and Sm3+, and the intricate mechanism of energy transfer has been extensively explored. The transparent glass–ceramics doped with Dy3+ and Sm3+ and containing NaGd(MoO4)2 crystal phase can produce tunable luminescence from yellow to orange with a high color purity and a low correlated color temperature, which indicates that they have the potential to be applied to warm white light scenes such as household lighting under ultraviolet excitation.

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“…8,9 In fact, photoluminescent energy transfer between two rare earth cations is common and has been widely investigated; for example, Sr 4 Al 14 O 25 :Ce 3+ ,Tb 3+ , Sr 2 MgAl 22 O 36 :Ce 3+ , Dy 3+ , KGd 2 F 7 :Dy 3+ ,Sm 3+ , N a 2 CaSiO 4 :Dy 3+ ,Eu 3+ , YGa 1.5 Al 1.5 (BO 3 ) 4 :Tb 3+ ,Eu 3+ , and LaOCl:Tb 3+ ,Sm 3+ . [10][11][12][13][14][15] Among the rare earth activators, Tb 3+ is an efficient activator for green emission due to the 5 D 4 → 7 F 5 transition; however, there are several weak points prohibiting the practical application of Tb 3+ . For instance, the 4f to 4f transitions lie in the near-UV range, but they show line absorption and are parity-forbidden, which prohibits the high energy efficiency; the broad and parity-allowed 4f 8 to 4f 7 5d 1 absorption locates in the deep UV region (<300 nm), which does not match with that of the low-cost LED chips.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Color-tunable emissions realized by Tb³⁺ to Eu³⁺ energy transfer in ZnGdB₅O₁₀ under near-UV excitation

Gao¹,

Cong²,

Yang³

2023

Dalton Trans.

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Original KGd2F7 nanocrystals in fluoro-oxide glass ceramics by Dy3+/Sm3+ co-doped for white light emission

Cited by 19 publications

References 30 publications

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu³⁺ to Eu²⁺ with Si₃N₄

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu³⁺ to Eu²⁺ with Si₃N₄

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Color-tunable emissions realized by Tb³⁺ to Eu³⁺ energy transfer in ZnGdB₅O₁₀ under near-UV excitation

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Original KGd2F7 nanocrystals in fluoro-oxide glass ceramics by Dy3+/Sm3+ co-doped for white light emission

Cited by 19 publications

References 30 publications

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu3+ to Eu2+ with Si3N4

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu3+ to Eu2+ with Si3N4

Dy3+‐ and/or Sm3+‐doped glass–ceramics containing NaGd(MoO4)2 crystalline phase for warm white light applications

Color-tunable emissions realized by Tb3+ to Eu3+ energy transfer in ZnGdB5O10 under near-UV excitation

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Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu³⁺ to Eu²⁺ with Si₃N₄

Improving white light emission and quantum yield of Ce@Eu co‐doped silicate glass by reducing Eu³⁺ to Eu²⁺ with Si₃N₄

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Color-tunable emissions realized by Tb³⁺ to Eu³⁺ energy transfer in ZnGdB₅O₁₀ under near-UV excitation