A novel solid-state synthesis of long afterglow, Si–N co-doped, Y 3 Al 5 O 12 :Ce 3+ phosphor

Zhu, Qiangqiang; Lu, Hao; Xu, Xin; Agathopoulos, Simeon; Zheng, Dongdong; Fang, Chaohe

doi:10.1016/j.jlumin.2015.12.030

Cited by 25 publications

(16 citation statements)

References 28 publications

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“…With increasing the temperature from 1500 to 1650 °C, formed N will be introduced into YAG lattice and replace the O atom. The replacement of O by N results in a larger crystal field splitting of the 5d energy level of Ce 3+ , and thus a shift of the 5d → 4f emission peak of C@YAG:Ce 3+ -1650 °C to lower energy compared to that of untreated YAG:Ce 3+ [17,30]. As the XRD pattern of C@YAG:Ce 3+ -1500 °C shows the existence of secondary phases, the excitation wavelength has been changed in order to investigate any possible secondary emission bands.…”

Section: Resultsmentioning

confidence: 99%

“…Especially, white light can be generated through a simple combination of blue-emitting devices and yellow emitting phosphor YAG:Ce 3+ , i.e., phosphor-converted LEDs (PC-LEDs), which have been successfully commercialized [9]. Therefore, adjusting luminescence properties of YAG:Ce 3+ attract much attention via codoping with another lanthanide ions (La 3+ , Pr 3+ , Tb 3+ , Sm 3+ codoping) [10,11,12,13,14] or modification of the host-lattice by substitution (Lu/Y, Ga/Al, Si/Al, N/O, Si-N/Al-O) [15,16,17,18,19,20]. …”

Section: Introductionmentioning

confidence: 99%

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Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors

et al. 2017

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To modify the luminescence properties of Ce3+-doped Y3Al5O12 (YAG) phosphors, they have been coated with a carbon layer by chemical vapor deposition and subsequently heat-treated at high temperature under N2 atmosphere. Luminescence of the carbon coated YAG:Ce3+ phosphors has been investigated as a function of heat-treatment at 1500 and 1650 °C. The 540 nm emission intensity of C@YAG:Ce3+ is the highest when heated at 1650 °C, while a blue emission at 400–420 nm is observed when heated at 1500 °C but not at 1650 °C. It is verified by X-ray diffraction (XRD) that the intriguing luminescence changes are induced by the formation of new phases in C@YAG:Ce3+-1500 °C, which disappear in C@YAG:Ce3+-1650 °C. In order to understand the mechanisms responsible for the enhancement of YAG:Ce3+ emission and the presence of the blue emission observed for C@YAG:Ce3+-1500 °C, the samples have been investigated by a combination of several electron microscopy techniques, such as HRTEM, SEM-CL, and SEM-EDS. This local and cross-sectional analysis clearly reveals a gradual transformation of phase and morphology in heated C@YAG:Ce3+ phosphors, which is related to a reaction between C and YAG:Ce3+ in N2 atmosphere. Through reaction between the carbon layer and YAG host materials, the emission colour of the phosphors can be modified from yellow, white, and then back to yellow under UV excitation as a function of heat-treatment in N2 atmosphere.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors

et al. 2017

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“…Y 3 Si 5 N 9 O has a higher nitrogen content [N/(N+O) = 0.9] than other 2 Y-oxonitridosilicate quaternary compounds, the high covalence of the host-lattice and strong nephelauxetic effect can thus be anticipated. 27 It therefore makes Y 3 Si 5 N 9 O to be an interesting host for luminescent materials.…”

Section: Introductionmentioning

confidence: 99%

“…Y 3 Si 5 N 9 O was first reported to have the composition of Y 2 Si 3 N 6 in 1986 and was revised to the current composition in 2001 due to the existence of a small amount of oxygen and the variation of the Y:Si ratio. Y 3 Si 5 N 9 O has a higher nitrogen content [N/(N + O) = 0.9] than other Y-oxonitridosilicate quaternary compounds, the high covalence of the host-lattice and strong nephelauxetic effect thus can be anticipated . It therefore makes Y 3 Si 5 N 9 O an interesting host for luminescent materials.…”

Section: Introductionmentioning

confidence: 99%

Extra-Broad Band Orange-Emitting Ce³⁺-Doped Y₃Si₅N₉O Phosphor for Solid-State Lighting: Electronic, Crystal Structures and Luminescence Properties

et al. 2016

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Luminescent materials play an important role in making solid state white light-emitting diodes (w-LEDs) more affordable home lighting applications. To realize the next generation of solid-state w-LEDs with high color-rendering index (CRI), the discovery of broad band and long emission wavelength luminescent materials is an urgent mission. Regarding this, the oxonitridosilicate Y 3 Si 5 N 9 O with a high nitrogen concentration should be a suitable host material to achieve those promising luminescent properties. In this work, a phase-pure Ce 3+ -doped Y 3 Si 5 N 9 O was successfully synthesized through the carbothermal reduction and nitridation method. Y 3 Si 5 N 9 O:Ce 3+ shows an emission maximum at 620 nm and an extremely broad emission band with a full-width at half maximum (FWHM) of 178 nm. The electronic and crystal structure calculations indicate an indirect band gap of 2.6 eV (experimental value: 4.0 eV), and identify two Ce 3+ sites with different local environments that determine the luminescence properties. The orange-emitting phosphor has the absorption, internal and external quantum efficiencies of 89.5, 17.2 and 15.6% under 450 nm excitation, respectively. The valence state of Ce, cathodoluminescence, decay time, and thermal quenching of the phosphor were also investigated to understand the structure-property relationships.

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“…In recent years several chemical synthesis methods have been developed and successfully used for the production of pure phase YAG powders. These methods include the coprecipitation [10,11], spray-pyrolysis [12,13], homogeneous precipitation [14,15], sol-gel method [16,17], solid-state method [18,19] and others.…”

Section: Introductionmentioning

confidence: 99%

Influence of different diffusion rates of reaction reagents on the synthesis of yttrium aluminium garnet (YAG)

Dabulytė-Bagdonavičienė

Nečiporenko

Ivanauskas

et al. 2021

J Math Chem

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A mathematical model for the synthesis of yttrium aluminium garnet (Y 3 Al 5 O 12 , YAG) is presented in the article. The preparation of YAG by two synthesis methods, namely the sol-gel chemistry approach and the solid-state reaction method is considered. The model of YAG synthesis is based on the system of non-stationary diffusion equations containing the nonlinear terms related to the kinetics of the reaction and diffusion rates. The periodisation of the synthesis space is considered. In this study, the computer simulation tool was developed to solve the system of partial differential equations. The developed software is employed to investigate the influence of the concentration of YAG on diffusion rates and the synthesis duration as well as on the duration when the rate of change in reaction product mass is at a maximum.

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A novel solid-state synthesis of long afterglow, Si–N co-doped, Y 3 Al 5 O 12 :Ce 3+ phosphor

Cited by 25 publications

References 28 publications

Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors

Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors

Extra-Broad Band Orange-Emitting Ce³⁺-Doped Y₃Si₅N₉O Phosphor for Solid-State Lighting: Electronic, Crystal Structures and Luminescence Properties

Influence of different diffusion rates of reaction reagents on the synthesis of yttrium aluminium garnet (YAG)

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A novel solid-state synthesis of long afterglow, Si–N co-doped, Y 3 Al 5 O 12 :Ce 3+ phosphor

Cited by 25 publications

References 28 publications

Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors

Transition of Emission Colours as a Consequence of Heat-Treatment of Carbon Coated Ce3+-Doped YAG Phosphors

Extra-Broad Band Orange-Emitting Ce3+-Doped Y3Si5N9O Phosphor for Solid-State Lighting: Electronic, Crystal Structures and Luminescence Properties

Influence of different diffusion rates of reaction reagents on the synthesis of yttrium aluminium garnet (YAG)

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Extra-Broad Band Orange-Emitting Ce³⁺-Doped Y₃Si₅N₉O Phosphor for Solid-State Lighting: Electronic, Crystal Structures and Luminescence Properties