Temperature dependence of energy transfer in tunable white light-emitting phosphor BaY2Si3O10:Bi3+,Eu3+ for near UV LEDs

Zhou, Hongpeng; Wang, Qingping; Jin, Yongxing

doi:10.1039/c5tc02514a

Cited by 93 publications

(45 citation statements)

References 40 publications

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“…Broad excitation band from 200 to 450 nm was observed monitored at 616 nm. The strongest peak at about 270 nm is ascribed to Eu 3+ −O 2− charge transfer transition (CTB) from negative oxygen 2p orbit to the empty 4f orbit of Eu 3+ , which is easy to influence by host environment [27]. Other narrow absorption peaks in the regionof 300 to 450 nm at 363, 382, 394, and 467 nm are attributed to 7 F 0 → 5 D 4 , 7 F 0 → 5 G 4 , 7 F 0 → 5 L 6 , and 7 F 0 → 5 D 2 transitions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Wang

Deng

et al. 2017

Materials

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A series of Tb3+, Eu3+-doped Sr2MgSi2O7 (SMSO) phosphors were synthesized by high temperature solid-state reaction. X-ray diffraction (XRD) patterns, Rietveld refinement, photoluminescence spectra (PL), and luminescence decay curves were utilized to characterize each sample’s properties. Intense green emission due to Tb3+ 5D4→7F5 transition was observed in the Tb3+ single-doped SMSO sample, and the corresponding concentration quenching mechanism was demonstrated to be a diople-diople interaction. A wide overlap between Tb3+ emission and Eu3+ excitationspectraresults in energy transfer from Tb3+ to Eu3+. This has been demonstrated by the emission spectra and decay curves of Tb3+ in SMSO:Tb3+, Eu3+ phosphors. Energy transfer mechanism was determined to be a quadrupole-quadrupole interaction. And critical distance of energy transfer from Tb3+ to Eu3+ ions is calculated to be 6.7 Å on the basis of concentration quenching method. Moreover, white light emission was generated via adjusting concentration ratio of Tb3+ and Eu3+ in SMSO:Tb3+, Eu3+ phosphors. All the results indicate that SMSO:Tb3+, Eu3+ is a promising single-component white light emitting phosphor.

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Section: Resultsmentioning

confidence: 99%

Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Wang

Deng

et al. 2017

Materials

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“…Meanwhile, the rotation speed of the mill is 200 rpm and ball‐milling time is 10 hours. After mixing and drying, a small amount of powders were pressed into plates of 15 mm diameter and 1.5 mm thickness; then, the plates were embedded into powders of each composition for presintering at 780‐1000°C for 3 hours . During the presintering process, the major reaction was as follows:

{Na}_{2} {CO}_{3} + {Bi}_{2} O_{3} + 4 {TiO}_{2} \to 4 false({Bi}_{0.5} {Na}_{0.5} false) {TiO}_{3} + {CO}_{2} false↑

…”

Section: Methodsmentioning

confidence: 99%

“…Typically, Bi‐doped materials can be developed as phosphors to radiate from UV to IR region . Therefore, in this paper, we have studied Eu 3+ ‐doped BNT ceramic in order to improve its electrical properties and achieve excellent luminescence properties …”

Section: Introductionmentioning

confidence: 99%

Luminescence and electrical properties of Eu‐modified Bi_0.5Na_0.5TiO₃ multifunctional ceramics

et al. 2019

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The Eu3+‐modified Bi0.5Na0.5TiO3 (BNT) ceramics have been fabricated by the solid‐state reaction method. The impact of Eu3+ doping on the structure, photoluminescence, and electrical properties has been studied by XRD, SEM, PL spectra, and LCR meter. X‐ray diffraction analysis reveals that the crystal structure of the samples is well matched with the trigonal perovskite, and the optimal temperature of presintering is 880°C. The Eu3+‐doped BNT ceramics show excellent red fluorescence at 614 nm corresponding to the 5D0→7F2 transition of Eu3+ under 466 nm excitation and relatively long fluorescence lifetime. The BNT‐0.02Eu ceramic density is up to 5.68 g/cm3 and the relative density is up to 94.6% with sintering temperature 1075°C. The piezoelectric constant (d33) of samples has been significantly improved up to 110 pC/N by Eu3+ doping. The BNT‐0.03Eu ceramic presintered at 880°C and sintered at 1050°C has good dielectric properties and excellent luminescence properties. Eu3+‐doped BNT ceramics make it potential applications for novel integrated electro‐optical and multifunctional devices.

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“…Meanwhile, with the development of LED chip technology, the emission bands of LED chips shifted from blue light to near-UV range which can offer higher energy to pump the phosphor 9 . For the above reasons, more and more attentions have been paid on phosphors with high absorption in the near-UV spectral region 10–12 .…”

Section: Introductionmentioning

confidence: 99%

Break the Interacting Bridge between Eu3+ Ions in the 3D Network Structure of CdMoO4: Eu3+ Bright Red Emission Phosphor

Noh

Park

Moon

et al. 2018

Sci Rep

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Eu3+ doped CdMoO4 super red emission phosphors with charge compensation were prepared by the traditional high temperature solid-state reaction method in air atmosphere. The interrelationships between photoluminescence properties and crystalline environments were investigated in detail. The 3D network structure which composed by CdO8 and MoO4 polyhedra can collect and efficiently transmit energy to Eu3+ luminescent centers. The relative distance between Eu3+ ions decreased and energy interaction increased sharply with the appearance of interstitial occupation of O2− ions (). Therefore, fluorescence quenching occurs at the low concentration of Eu3+ ions in the 3D network structure. Fortunately, the charge compensator will reduce the concentration of which can break the energetic interaction between Eu3+ ions. The mechanism of different charge compensators has been studied in detail. The strong excitation band situated at ultraviolet and near-ultraviolet region makes it a potential red phosphor candidate for n-UV based LED.

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Temperature dependence of energy transfer in tunable white light-emitting phosphor BaY₂Si₃O₁₀:Bi³⁺,Eu³⁺ for near UV LEDs

Cited by 93 publications

References 40 publications

Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Luminescence and electrical properties of Eu‐modified Bi_0.5Na_0.5TiO₃ multifunctional ceramics

Break the Interacting Bridge between Eu3+ Ions in the 3D Network Structure of CdMoO4: Eu3+ Bright Red Emission Phosphor

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Temperature dependence of energy transfer in tunable white light-emitting phosphor BaY2Si3O10:Bi3+,Eu3+ for near UV LEDs

Cited by 93 publications

References 40 publications

Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Luminescence and electrical properties of Eu‐modified Bi0.5Na0.5TiO3 multifunctional ceramics

Break the Interacting Bridge between Eu3+ Ions in the 3D Network Structure of CdMoO4: Eu3+ Bright Red Emission Phosphor

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Product

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Temperature dependence of energy transfer in tunable white light-emitting phosphor BaY₂Si₃O₁₀:Bi³⁺,Eu³⁺ for near UV LEDs

Luminescence and electrical properties of Eu‐modified Bi_0.5Na_0.5TiO₃ multifunctional ceramics