Facile synthesis of bifunctional Eu3+-activated NaBiF4 red-emitting nanoparticles for simultaneous white light-emitting diodes and field emission displays

Du, Peng; Huang, Xiaoyong; Yu, Jae Su

doi:10.1016/j.cej.2017.12.063

Cited by 377 publications

(95 citation statements)

References 61 publications

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“…Rare‐earth doped phosphors, which show characteristics of superior chemical stability, better thermal and environment‐friendliness, have received considerable attention and exhibit promising applications in optical temperature sensor, solid‐state lighting, plasma display panel, solar cell, medical diagnostic and field emission display . In these applications, phosphor converted (pc)‐LED devices and fluorescence thermometers are very compatible with a variety of applications themes.…”

Section: Introductionmentioning

confidence: 99%

NUV light induced visible emission in Er³⁺‐activated NaSrLa(MoO₄)O₃ phosphors for green LEDs and thermometer

et al. 2019

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Er3+‐activated NaSrLa(MoO4)O3 phosphors were synthesized by a traditional solid‐state reaction technique, which exhibited bright green emissions ascribing to the (2H11/2, 4S3/2) → 4I15/2 transitions of Er3+ ions under 377 nm excitation. The luminescence intensity increased with increasing the Er3+ ion concentration and achieved its maximum value when the doping concentration was 4 mol%. Moreover, the critical distance was estimated to be 25.32 Å, and the dipole‐dipole interaction played a significant role in NR energy transfer between Er3+ ions in NaSrLa(MoO4)O3 host lattices. At a forward bias current of 100 mA, the Light Emitting Diode (LED) device emitted a bright green emission with the color coordinate of (0.2547, 0.5996) that can be observed by the naked eye. Besides, based on the thermally coupled levels of 2H11/2 and 4S3/2, the temperature sensing performances of the prepared phosphors in the temperature range of 303‐483 K were studied using the fluorescence intensity ratio technique. The maximum sensor sensitivity was about 0.0150 K−1 when the temperature was 483 K, and the Er3+ ion concentration largely influenced the sensor sensitivity of studied samples. Furthermore, the prepared phosphors exhibited excellent water resistance and thermal stability behavior. These characteristics demonstrated that the Er3+ activated NaSrLa(MoO4)O3 phosphors were dual‐functional materials for solid‐state illumination and non‐contact temperature measurement.

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Section: Introductionmentioning

confidence: 99%

NUV light induced visible emission in Er³⁺‐activated NaSrLa(MoO₄)O₃ phosphors for green LEDs and thermometer

et al. 2019

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“…The representative excitation spectrum of the Cs 3 Cu 2 I 5 halides doped with 11 mol% of Mn 2+ ions monitored at the emission wavelength of 562 nm was tested and shown in Figure 2A. Evidently, the excitation spectrum was composed of two intense absorption bands centered at around 378 and 482 nm which were assigned to the 6 A 1 (6S) → 4 T 2 (4D) and 6 A 1 (6S) → 4 T 1 (4G) transitions, respectively. 22 Although the intensity of the absorption peak at 482 nm was higher than that of the band at 378 nm, it is far away from the emission wavelength of the commercial blue chip (~450 nm) which makes it unsuitable for blue chip-based white-LED.…”

Section: Resultsmentioning

confidence: 99%

“…The commercial white‐LED device, which is constructed by applying the Y 3 Al 5 O 12 :Ce 3+ yellow phosphors and blue chip, emits cold white light with unsatisfied color rendering index (CRI < 75) and superior high‐color correlated temperature (CCT > 7000 K) because the Y 3 Al 5 O 12 :Ce 3+ yellow phosphors do not have enough red‐emitting component in its luminescent profile . In comparison, the other route utilizing the commercial near‐ultraviolet (NUV) chip to pump three hybrid (red‐green‐blue) emitting phosphors was put forward to generate high‐quality white‐LED lamp with high CRI and low CCT values . Significantly, the optical performance of the phosphors plays a crucial role in determining the colorific properties of the phosphor‐converted white‐LED.…”

Section: Introductionmentioning

confidence: 99%

Neoteric Mn²⁺‐activated Cs₃Cu₂I₅ dazzling yellow‐emitting phosphors for white‐LED

Luo

Cheng

2019

J Am Ceram Soc

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Neoteric Mn2+‐activated Cs3Cu2I5 yellow‐emitting halides were achieved by the simple solid‐state reaction route. The near‐ultraviolet light was the suitable excitation lighting source for the resultant halides. The resultant halides exhibited bright yellow emission under the excitation of 378 nm and the optimum dopant content was 11 mol%. The multipole‐multipole interaction contributed to the concentration quenching mechanism and the critical distance was 28.65 Å. The thermal resistance of the prepared compounds was identified by the temperature‐dependent emission spectra. Ultimately, the designed light‐emitting diode showed bright white light with satisfied color rendering index, proper color coordinate, and suitable correlated color temperature. These results indicated that the prepared yellow‐emitting halides were suitable for indoor illumination.

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“…Currently, luminescent materials doped with rare‐earth (RE) ions have wide applications in many fields, such as optical temperature sensors, photosensitive devices, and solar cells, owing to the characteristic energy level structure and admirable luminescent emission properties of the RE ions . In terms of the upconversion (UC) mission, it can convert the low‐energy light to the high‐energy light by a multiphoton absorption process .…”

Section: Introductionmentioning

confidence: 99%

Reversible luminescence modulation and temperature‐sensing properties of Pr³⁺/Yb³⁺ codoped K_0.5Na_0.5NbO₃ ceramics

et al. 2019

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In this work, we have prepared a novel (K0.5Na0.5)0.99‐xPrxYb0.01NbO3 (abbreviated as KNN:xPr3+/0.01Yb3+, x = 0.0006, 0.0008, 0.001, 0.002, 0.003, and 0.004) ceramics, which possess visible UC emissions, photochromic (PC) and optical thermometric properties. Under the excitation of a 980‐nm diode laser, all the samples show the featured emissions of Pr3+ ions and the UC emission intensity is greatly dependent on the Pr3+ doping content. The optimal UC luminescence intensity is obtained at x = 0.001. All the prepared samples show a strong PC reaction, and a large luminescence quenching degree (ΔRt) of 74.94% is found. The optical thermometric properties of both the irradiated and unirradiated KNN:0.001Pr3+/0.01Yb3+ ceramics in the temperature range of 123‐573 K have been investigated via measuring the temperature‐dependent UC emission spectra of green emissions, which originate from the two 3P1 and 3P0 thermally coupled levels. It has been found that the prepared samples have both excellent PC behaviors and temperature‐sensing performances. These results suggest that the KNN:xPr3+/0.01Yb3+ ceramics are promising candidates for the applications in PC reaction and thermometers.

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Facile synthesis of bifunctional Eu3+-activated NaBiF4 red-emitting nanoparticles for simultaneous white light-emitting diodes and field emission displays

Cited by 377 publications

References 61 publications

NUV light induced visible emission in Er³⁺‐activated NaSrLa(MoO₄)O₃ phosphors for green LEDs and thermometer

NUV light induced visible emission in Er³⁺‐activated NaSrLa(MoO₄)O₃ phosphors for green LEDs and thermometer

Neoteric Mn²⁺‐activated Cs₃Cu₂I₅ dazzling yellow‐emitting phosphors for white‐LED

Reversible luminescence modulation and temperature‐sensing properties of Pr³⁺/Yb³⁺ codoped K_0.5Na_0.5NbO₃ ceramics

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Facile synthesis of bifunctional Eu3+-activated NaBiF4 red-emitting nanoparticles for simultaneous white light-emitting diodes and field emission displays

Cited by 377 publications

References 61 publications

NUV light induced visible emission in Er3+‐activated NaSrLa(MoO4)O3 phosphors for green LEDs and thermometer

NUV light induced visible emission in Er3+‐activated NaSrLa(MoO4)O3 phosphors for green LEDs and thermometer

Neoteric Mn2+‐activated Cs3Cu2I5 dazzling yellow‐emitting phosphors for white‐LED

Reversible luminescence modulation and temperature‐sensing properties of Pr3+/Yb3+ codoped K0.5Na0.5NbO3 ceramics

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Product

Resources

About

NUV light induced visible emission in Er³⁺‐activated NaSrLa(MoO₄)O₃ phosphors for green LEDs and thermometer

NUV light induced visible emission in Er³⁺‐activated NaSrLa(MoO₄)O₃ phosphors for green LEDs and thermometer

Neoteric Mn²⁺‐activated Cs₃Cu₂I₅ dazzling yellow‐emitting phosphors for white‐LED

Reversible luminescence modulation and temperature‐sensing properties of Pr³⁺/Yb³⁺ codoped K_0.5Na_0.5NbO₃ ceramics