Energy transfer from Ce3+to Dy3+ ions for white light emission in Sr2MgAl22O36:Ce3+, Dy3+ phosphor

Dev, Kapil; Selot, Anupam; Nair, Govind B.; Barai, Vijay L.; Haque, Fozia Z.; Aynyas, Mahendra

doi:10.1016/j.jlumin.2018.10.092

Cited by 21 publications

(11 citation statements)

References 35 publications

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“…Energy transfer in phosphors with sensitizer-activator ion pairs means that part of the excitation energy of the sensitizer ion transfers to activator ion through a non-radiative process and it subsequently enhances or generates the emission of the activator. The energy transfer among Ce 3+ and other 4f ions is well known and used to synthesize phosphors with expected properties [12][13][14][15][16][17][18].…”

Section: Ce 3+ Fluorescencementioning

confidence: 99%

“…After using laser induction [4], time-resolved measurements of the Gd 3+ fluorescence for zircon, anhydrite, and hardystonite have been prepared. The energy transfer among Gd 3+ and many RE 3+ have been analyzed [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. For the studied agrellite sample, the energy transfer from Gd 3+ to RE 3+ could be excluded.…”

Section: Ce 3+ Fluorescencementioning

confidence: 99%

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Luminescence of Agrellite Specimen from the Kipawa River Locality

Czaja

Lisiecki

2019

Minerals

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Using steady-state luminescence measurements, the luminescence spectra of Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Dy3+, Er3+ and Yb3+ for the agrellite sample from the Kipawa River region have been measured. The emission spectra of Eu3+ and Dy3+ next to those of Sm3+ and Pr3+ have been measured for characteristic excitation conditions. The most efficient luminescence activator in the studied sample was Ce3+. This ion was also a sensitizer of Pr3+, Sm3+, Eu3+, and Dy3+ luminescence.

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Section: Ce 3+ Fluorescencementioning

confidence: 99%

Section: Ce 3+ Fluorescencementioning

confidence: 99%

Luminescence of Agrellite Specimen from the Kipawa River Locality

Czaja

Lisiecki

2019

Minerals

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“…1,4 Generally, an ET process occurs in a phosphor by a resonance path between a pair formed from a separated sensitizer and activator. 5 To date, a large number of phosphors with tunable luminescence have been obtained based on the ET process between a sensitizer and activator, including Sr 8 ZnY(PO 4 ) 7 :Tb 3+ /Eu 3+ , 6 12 and many more.…”

Section: Introductionmentioning

confidence: 99%

“…The emission bands of Ce 3+ ions shift from the ultraviolet region to red region depending on the crystal structure of the host when Ce 3+ ions act as activators. 14 Meanwhile, Ce 3+ ions can also transfer energy to other ions through the ET process, including Eu 2+ , 8 Tb 3+ , 9 Mn 2+ , 11 and Dy 3+ , 12 when they act as sensitizers. Dy 3+ is also widely used as an activator in phosphors, generally emitting light in the blue, yellow, and red regions.…”

Section: Introductionmentioning

confidence: 99%

Energy-Transfer-Induced Tunable Luminescence in Mg2Al4Si5O12:Ce3+/Dy3+ Phosphors

Yang

Sun²,

Qiu

et al. 2021

Journal of Elec Materi

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Ce 3+ -or/and Dy 3+ -doped Mg 2 Al 4 Si 5 O 18 phosphors have been fabricated via a sintering process at 1400°C for 5 h and their crystallinity and luminescence characteristics investigated. x-Ray powder diffraction analysis demonstrated that Ce 3+ /Dy 3+ ions entered the Mg 2 Al 4 Si 5 O 18 host and formed a solid solution. When excited at 345 nm, Ce 3+ -doped Mg 2 Al 4 Si 5 O 18 phosphor emitted light in the blue region while Dy 3+ -doped Mg 2 Al 4 Si 5 O 18 phosphor emitted light in the yellow region. When excited at 345 nm, emission bands located in both the blue and yellow regions were observed for the Ce 3+ /Dy 3+ -codoped Mg 2 Al 4-Si 5 O 18 phosphor. Because of Ce 3+ fi Dy 3+ energy transfers, the Ce 3+ /Dy 3+codoped Mg 2 Al 4 Si 5 O 18 phosphor showed tunable luminescence, changing from the blue to yellow-green region through the white region with increasing Dy 3+ concentration in the Ce 3+ /Dy 3+ -codoped Mg 2 Al 4 Si 5 O 18 phosphor. The decay characteristics of the Ce 3+ emission in the Ce 3+ /Dy 3+ -codoped Mg 2 Al 4 Si 5 O 18 phosphors were also investigated. With increasing Dy 3+ concentration, the lifetime of the Ce 3+ emission decreased continuously, further confirming the occurrence of Ce 3+ fi Dy 3+ energy transfer.

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“…The chemical environment near Dy 3+ ions has a strong effect on yellow emission, while there is a relatively invariable effect on blue emission. The color range of Dy 3+ ‐doped phosphors may be balanced, therefore, through changes in yellow light intensity due to the crystal field. By adjusting the excitation wavelength, RE ion concentrations, and host composition, white light may be produced from the Dy 3+ ‐doped materials by regulating the intensity of yellow to blue (Y/B) emissions.…”

Section: Introductionmentioning

confidence: 99%

Study of luminescence properties of dysprosium‐doped CaAl₁₂O₁₉ phosphor for white light‐emitting diodes

Dev

Selot²,

Nair

et al. 2019

Luminescence

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Dy 3+ -doped CaAl 12 O 19 phosphors were synthesized utilizing a combustion method.Crystal structure and morphological examinations were performed respectively using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques to identify the phase and morphology of the synthesized samples. Fourier transform infrared spectroscopy (FTIR) estimations were carried out using the KBr method.Photoluminescence properties (excitation and emission) were recorded at room temperature. CaAl 12 O 19 :Dy 3+ phosphor showed two emission peaks respectively under a 350-nm excitation wavelength, centered at 477 nm and 573 nm. Dipole-dipole interaction via nonradiative energy shifting has been considered as the major cause of concentration quenching when Dy 3+ concentration was more than 3 mol%. The CIE chromaticity coordinates positioned at (0.3185, 0.3580) for the CaAl 12 O 19 :0.03Dy 3+ phosphor had a correlated color temperature (CCT) of 6057 K, which is situated in the cool white area. Existing results point out that the CaAl 12 O 19 :0.03Dy 3+ phosphor could be a favorable candidate for use in white light-emitting diodes (WLEDs). KEYWORDS aluminate, concentration quenching, Dy 3 + , photoluminescence, WLEDs | INTRODUCTIONAt the present time, the development of energy-saving lighting is an essential core interest for researchers. Large amounts of power can be saved by using efficient energy-saving light sources. Traditional incandescent and fluorescent lamps, with their resulting heat or gas release, have related colossal energy losses. [1] The use of energy proficient solid-state lighting appliances, for example compact fluorescent lamps (CFLs) and light-emitting diodes (LEDs), to deliver white light is an attractive alternative. Due to the above concern, the production of phosphors with excellent properties is an essential prerequisite. The efficacy of white light-emitting diodes (WLEDs) has surpassed that of incandescent lamps and fluorescent lamps. Due to their exceptional luminescence features, improved stability, energy-efficient nature, prominent luminescence efficiency, ecological amicability, and low cost, research into WLEDs has become more important. [2][3][4] WLEDs are mostly fabricated by applying three different techniques: (i) by making use of a mixture of red-green-blue (RGB) LEDs;(ii) through the utilization of ultraviolet (UV) LEDs to excite RGB phosphors; and (iii) by employing blue LEDs to pump single-phase yellow or blended green and red phosphors. [1,5] At the present time, blue emitting chips combined with yellow phosphors (YAG:Ce 3+ ) are acknowledged as existing industrial WLEDs. Nevertheless, inferable from red light effect insufficiency, low color rendering index and high correlated color temperature (CCT) are commonly experienced by phosphors in this group. High CCT and low color rendering index (CRI) are not good factors when providing domiciliary or office lighting. This hindrance can be resolved by utilizing tricolor WLEDs dependent on red, green, and blue phosphors [6][7][8] . This ...

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Energy transfer from Ce3+to Dy3+ ions for white light emission in Sr2MgAl22O36:Ce3+, Dy3+ phosphor

Cited by 21 publications

References 35 publications

Luminescence of Agrellite Specimen from the Kipawa River Locality

Luminescence of Agrellite Specimen from the Kipawa River Locality

Energy-Transfer-Induced Tunable Luminescence in Mg2Al4Si5O12:Ce3+/Dy3+ Phosphors

Study of luminescence properties of dysprosium‐doped CaAl₁₂O₁₉ phosphor for white light‐emitting diodes

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Energy transfer from Ce3+to Dy3+ ions for white light emission in Sr2MgAl22O36:Ce3+, Dy3+ phosphor

Cited by 21 publications

References 35 publications

Luminescence of Agrellite Specimen from the Kipawa River Locality

Luminescence of Agrellite Specimen from the Kipawa River Locality

Energy-Transfer-Induced Tunable Luminescence in Mg2Al4Si5O12:Ce3+/Dy3+ Phosphors

Study of luminescence properties of dysprosium‐doped CaAl12O19 phosphor for white light‐emitting diodes

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Study of luminescence properties of dysprosium‐doped CaAl₁₂O₁₉ phosphor for white light‐emitting diodes