Monodispersed spherical YAG:Ce3+ phosphor particles by one-pot synthesis

Kim, Yeon; Shim, Kwang Bo; Wu, Mihye; Jung, Ha‐Kyun

doi:10.1016/j.jallcom.2016.09.129

Cited by 23 publications

(6 citation statements)

References 18 publications

(16 reference statements)

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“…One such compound is YAG:Ce 3þ (Y 3 Al 5 O 12 :Ce 3þ ) which absorbs between 420 and 500 nm and emits between 500 and 650 nm. 30 Another possibility is a dye with similar absorption and emission properties. A dye would also minimize scattering.…”

Section: Cool Roofing and Facadesmentioning

confidence: 99%

High quantum yield of the Egyptian blue family of infrared phosphors (MCuSi4O10, M = Ca, Sr, Ba)

Berdahl

Boocock

Chan

et al. 2018

Journal of Applied Physics

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The alkaline earth copper tetra-silicates, blue pigments, are interesting infrared phosphors. The Ca, Sr, and Ba variants fluoresce in the near-infrared (NIR) at 909, 914, and 948 nm, respectively, with spectral widths on the order of 120 nm. The highest quantum yield / reported thus far is ca. 10%. We use temperature measurements in sunlight to determine this parameter. The yield depends on the pigment loading (mass per unit area) x with values approaching 100% as x ! 0 for the Ca and Sr variants. Although maximum quantum yield occurs near x ¼ 0, maximum fluorescence occurs near x ¼ 70 g m À2 , at which / ¼ 0.7. The better samples show fluorescence decay times in the range of 130 to 160 ls. The absorbing impurity CuO is often present. Good phosphor performance requires long fluorescence decay times and very low levels of parasitic absorption. The strong fluorescence enhances prospects for energy applications such as cooling of sunlit surfaces (to reduce air conditioning requirements) and luminescent solar concentrators.

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Section: Cool Roofing and Facadesmentioning

confidence: 99%

High quantum yield of the Egyptian blue family of infrared phosphors (MCuSi4O10, M = Ca, Sr, Ba)

Berdahl

Boocock

Chan

et al. 2018

Journal of Applied Physics

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“…420 and 500 nm and emits between 500 and 650 nm. 29 Another possibility is a dye with similar absorption and emission properties. A dye would also minimize scattering.…”

Section: N-90mentioning

confidence: 99%

Solar-Reflective “Cool” Walls: Benefits, Technologies, and Implementation

Levinson

Ban-Weiss

Berdahl

et al. 2019

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This report was prepared as the result of work sponsored by the California Energy Commission. It does not necessarily represent the views of the Energy Commission, its employees or the State of California.The Energy Commission, the State of California, its employees, contractors and subcontractors make no warranty, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the uses of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the California Energy Commission nor has the California Energy Commission passed upon the accuracy or adequacy of the information in this report. i ACKNOWLEDGEMENTSThe authors thank the California Energy Commission for funding this project. We are grateful to David Hungerford of the Energy Commission for his guidance and management of the project. We also thank our industry partners 3M, Behr, Dexerials, Metal Construction Association (MCA), PPG, Saint Gobain, Sherwin Williams, Tex-Cote, and Valspar for supporting this project through donation of product samples, testing, analysis, and guidance. Tim Hebrink at 3M;

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“…16 Moreover, the spherical nature of phosphors can provide good rheological properties, presenting the advantage of improving optical efficiency in the preparation process of devices. 17 Unfortunately, AlN cannot be transformed to spherical morphology just by the surface tension method, due to no liquid phase existence of nitrides. AlN solid phase decomposes directly rather than melts to liquid phase at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescence properties of red‐emitting AlN:Mn²⁺ spherical phosphors

Chen

et al. 2022

J Am Ceram Soc.

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In this study, we successfully prepared red‐emitting AlN:Mn2+ spherical phosphors by using nitrogen pressure–assisted carbothermal reduction–nitridation method. The optimum preparation parameters were explored by changing nitrogen pressure, CaF2 content, reaction temperature, and the amount of MnCO3. It was confirmed that uniform spherical shape, large particle size, less impurity content, and suitable Mn2+ concentrations could effectively enhance the luminous intensity of AlN:Mn2+ phosphors. The structural compositions of the AlN:Mn2+ phosphors were characterized by X‐ray diffraction and X‐ray photoelectron spectroscopy, indicating that Mn2+ ions were successfully doped into AlN lattice by substitution of Al3+ ions, thus providing the red‐emitting luminescence centers. Based on the experimental results, we further proposed the underlying growth mechanism of spherical AlN phosphors. It was suggested that an adequate amount of liquid Ca‐aluminates was essential to achieve uniform spherical morphology and high fluorescence efficiency.

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Monodispersed spherical YAG:Ce3+ phosphor particles by one-pot synthesis

Cited by 23 publications

References 18 publications

High quantum yield of the Egyptian blue family of infrared phosphors (MCuSi4O10, M = Ca, Sr, Ba)

High quantum yield of the Egyptian blue family of infrared phosphors (MCuSi4O10, M = Ca, Sr, Ba)

Solar-Reflective “Cool” Walls: Benefits, Technologies, and Implementation

Synthesis and luminescence properties of red‐emitting AlN:Mn²⁺ spherical phosphors

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Monodispersed spherical YAG:Ce3+ phosphor particles by one-pot synthesis

Cited by 23 publications

References 18 publications

High quantum yield of the Egyptian blue family of infrared phosphors (MCuSi4O10, M = Ca, Sr, Ba)

High quantum yield of the Egyptian blue family of infrared phosphors (MCuSi4O10, M = Ca, Sr, Ba)

Solar-Reflective “Cool” Walls: Benefits, Technologies, and Implementation

Synthesis and luminescence properties of red‐emitting AlN:Mn2+ spherical phosphors

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Synthesis and luminescence properties of red‐emitting AlN:Mn²⁺ spherical phosphors