A new red phosphor BaGeF<sub>6</sub>:Mn<sup>4+</sup>: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

Zhou, Qiang; Zhou, Yayun; Liu, Yong; Luo, Liang; Peng, Jinhui; Yan, Jing; Wu, Mingmei

doi:10.1039/c4tc02956a

Cited by 142 publications

(51 citation statements)

References 29 publications

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“…1 Currently, the commercially available WLEDs are based on a blue chip with yellow phosphor (YAG : Ce). 1 Currently, the commercially available WLEDs are based on a blue chip with yellow phosphor (YAG : Ce).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

et al. 2015

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A series of LiGd 5 P 2 O 13 : Eu 3+ phosphors with a red-emitting band centered at 622 nm were synthesized by a high temperature solid-state reaction method. Structure-luminescence correlation, concentration quenching and thermal stability of the LiGd 5 P 2 O 13 : Eu 3+ phosphors were studied combined with XRD, PL/PLE spectra as well as temperature-dependent PL and decay curves. The optimum concentration of Eu 3+ doped in the LiGd 5 P 2 O 13 is 20 mol%, and the corresponding concentration quenching mechanism is found to be via dipole/quadrupole-quadrupole interactions. Intensity parameters (U 2 and U 4 ) andvarious radiative properties such as transition rates (A), branching ratios (b) and stimulated emission cross-section (d e ) were calculated using the Judd-Ofelt theory. LiGd 5 P 2 O 13 : Eu 3+ exhibited good thermal stability and its emission intensity decreased slightly at temperature above 150 C. The CIE coordinates of LiGd 5 P 2 O 13 : 0.20Eu 3+ (0.644, 0.339) are very close to s-RGB standard red (0.640, 0.330), and the corresponding quantum efficiency is 46.5%. The results show that LGPO : Eu 3+ may be considered as a potential red emitting phosphor for NUV/blue pumped WLEDs.

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Section: Introductionmentioning

confidence: 99%

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

et al. 2015

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“…31-38 and BMF 6 :Mn 4+ (B ¼ Ba, Zn, M ¼ Si, Ti, Ge) [39][40][41][42][43][44][45] were reported. Some of them show high quantum efficiency, thermal stability against quenching and so on.…”

Section: -6mentioning

confidence: 99%

Photoluminescence properties of a novel red fluoride K₂LiGaF₆:Mn⁴⁺nanophosphor

Zhu

Liu

et al. 2017

RSC Adv.

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Red K 2 LiGaF 6 :Mn 4+ phosphors have been synthesized by the facile cation-exchange method. To optimize the optical properties, the phosphors were synthesized by using different reaction conditions. The highest luminescence intensity was increased 3.6 times for the Mn concentration of 1%, reaction temperature of 20 C, and reaction time of 1 h. Replacement of the trivalent Al by Ga resulted in K 2 LiGaF 6 :Mn 4+ having better photoluminescence properties than K 2 LiAlF 6 :Mn 4+ . Furthermore, the studies of the temperaturedependent emission intensity of the phosphors confirmed their good thermal stability, making them promising red phosphor candidates for white light-emitting diodes.

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“…In fact, the activation with Mn

^{4 +}

ions results in a strong red-emitting luminescence which is excited by blue light. For this reason, Mn

^{4 +}

is an attractive substitute for well-established rare-earth activators in red phosphors [24,25,26,27,28,29]. …”

Section: Introductionmentioning

confidence: 99%

Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing

Venturini

Baumgärtner

Borisov

2018

Sensors

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Phosphors based on magnesium titanate activated with Mn4+ ions are of great interest because, when excited with blue light, they display a strong red-emitting luminescence. They are characterized by a luminescence decay which is strongly temperature dependent in the range from −50 ∘C to 150 ∘C, making these materials very promising for temperature sensing in the biochemical field. In this work, the optical and thermal properties of the luminescence of Mg2TiO4 are investigated for different Mn4+ doping concentrations. The potential of this material for temperature sensing is demonstrated by fabricating a fiber optic temperature microsensor and by comparing its performance against a standard resistance thermometer. The response of the fiber optic sensor is exceptionally fast, with a response time below 1 s in the liquid phase and below 1.1 s in the gas phase.

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A new red phosphor BaGeF₆:Mn⁴⁺: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

Cited by 142 publications

References 29 publications

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

Photoluminescence properties of a novel red fluoride K₂LiGaF₆:Mn⁴⁺nanophosphor

Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing

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A new red phosphor BaGeF6:Mn4+: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

Cited by 142 publications

References 29 publications

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd5P2O13 : Eu3+ phosphors for white LEDs

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd5P2O13 : Eu3+ phosphors for white LEDs

Photoluminescence properties of a novel red fluoride K2LiGaF6:Mn4+nanophosphor

Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing

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A new red phosphor BaGeF₆:Mn⁴⁺: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd₅P₂O₁₃ : Eu³⁺ phosphors for white LEDs

Photoluminescence properties of a novel red fluoride K₂LiGaF₆:Mn⁴⁺nanophosphor