123results about How to "Improve luminosity" patented technology

The invention provides rare earth doped fluorescent powder capable of emitting light through polychromatic light excitation and thermal excitation and a preparation method and application of the rare earth doped fluorescent powder. The fluorescent powder comprises rare earth doped fluoride, the chemical formula of the rare earth doped fluoride is Cs2NaLnF6: xRe < 3 + >, wherein Ln represents a rare earth element, Re < 3 + > represents a doped rare earth ion, and Ln and Re < 3 + > are respectively selected from different rare earth elements; x is the doping amount of Re in each mole of rare earth doped fluoride, 0 lt; xlt; and 100 mmol%. According to the invention, the advantages of wide band gap and appropriate fluorine vacancy trap of the Cs2NaLnF6 material are utilized, and the trap distribution and luminescence performance of the material can be effectively regulated and controlled by doping different types of rare earth ions with different concentrations and contents; polychromatic light excitation and thermal excitation luminescence of one or more rare earth ions under different doping concentrations are realized, and the application potential is high. The Cs2NaLnF6 fluorescent powder composite film material disclosed by the invention is excellent in flexibility, good in water resistance, high in stability and simple in preparation process, and has a great application prospect in the fields of information storage, encryption, counterfeiting prevention and the like.

The present invention relates to a novel compound having excellent carrier transport capability, light emission capability, and thermal stability, and an organic electroluminescent device having improved characteristics such as light emission efficiency, driving voltage, and lifespan by including the compound in one or more organic material layers, and to an organic electroluminescent device.

The invention relates to the technical field of lighting lamps, and discloses a modular line lamp easy to disassemble and assemble, the modular line lamp comprises at least one lamp body, the lamp body comprises a shell, a lower light-emitting module and end covers, and the lower light-emitting module is integrally and detachably hung in a cavity defined by the shell and the two end covers; the LED lamp further comprises splicing pieces, the splicing pieces are used for linearly splicing the two lamp bodies, the splicing pieces can be detachably installed on the inner sides of the two ends of shells of the lamp bodies through threaded fasteners, and when the two lamp bodies are spliced, the shells at the adjacent ends of the two lamp bodies and the lower light-emitting modules are tightly spliced respectively. According to the line lamp, the light-emitting areas of the spliced lamp bodies can be tightly spliced in a mode of internally arranging the splicing pieces, so that dark areas are effectively prevented from being generated at the spliced positions of the lamp bodies of the line lamp, and the light-emitting effect is good; the lower light-emitting module which is composed of the main light-emitting components and can be independently assembled in advance and integrally disassembled and assembled is integrally and detachably hung in the shell in a hanging installation mode, assembly is easy, disassembly and assembly are convenient, and disassembly, assembly and maintenance are convenient.

According to the display panel, the preparation method thereof and the display device provided by the invention, the thicknesses of the electrodes with different colors are set to be different, so that the light-emitting effects of the pixels with different colors are optimal, and the display effect of the display panel is improved; meanwhile, due to the fact that the thicknesses of the electrodes of different colors are different, when the packaging layers of different colors are etched by adopting the same etching amount, the thin electrodes are difficult to resist etching and easy to be etched through, and then pits appear on the film layer below. Therefore, the thicknesses of the sub-packaging layers with lower density in the different isolation openings are set to be different, the thinner first color electrode corresponds to the thinner sub-packaging layer, and the thinner sub-packaging layer can be etched with less etching amount, so that the thinner first color electrode is prevented from being etched through, and the processing performance of the display panel is improved.

The invention discloses a preparation method for improving water resistance and dyeing stability of noctilucent fiber and application thereof.The preparation method comprises the steps that firstly, a rare earth luminescent material SAOED is modified, hydroxyl on a chain of the rare earth luminescent material SAOED and hydroxyl generated by hydrolysis of HDTMS under the conditions of heating and the like are subjected to a dehydration condensation reaction, and the problem that the rare earth luminescent material SAOED is prone to hydrolysis in water is effectively solved; the water resistance of the luminescent powder is improved; in consideration of subsequent processing and application of the prepared noctilucent fiber, SiO2 with good light transmission is used for carrying out inorganic coating on the modified SAOED, so that a good luminous master batch protection effect is achieved under the condition of relatively small influence on the brightness of the noctilucent fiber, and dyeing of the noctilucent fiber is facilitated. According to the method, a low-temperature carrier dyeing method is adopted, the dye is diffused to the fiber by utilizing the plasticizing and puffing effects of the carrier, the dyed noctilucent fiber is high in afterglow intensity and good in dyeing fastness, and the method is simple in process, low in cost and high in safety.

The invention provides a triazine-containing carbazole compound and application thereof, the triazine-containing carbazole compound has a structure as shown in a formula I. The triazine-containing carbazole compound obtained by designing the structure of the triazine-containing carbazole compound has good luminescence performance, can be used for preparing organic electroluminescent devices, and can be used for preparing organic electroluminescent devices. Particularly, as a green light main body material in the organic electroluminescent device, the compound can effectively reduce the driving voltage of the organic electroluminescent device and improve the current efficiency of the organic electroluminescent device.

The invention discloses an electroluminescent fiber as well as a preparation method and application thereof. The electroluminescent fiber comprises n conductive fiber bodies and an electroluminescent layer, wherein n is greater than or equal to 2; wherein the conductive fiber bodies are parallel to one another and are arranged at intervals; the electroluminescent layer is coated on the surfaces of the conductive fiber bodies and is filled in gaps among the conductive fiber bodies. The electroluminescent fiber provided by the invention has the advantages of being adjustable in mechanical property and capable of keeping good luminescence stability in a tensile state.

The invention relates to a preparation method of semi-raspberry-shaped Janus particles, preparation of carbon dot modified semi-raspberry-shaped Janus particles and application of the particles in fluorescence detection.According to the preparation method of the semi-raspberry-shaped Janus particles, polystyrene is used as a seed, glycidyl methacrylate (GMA) is used as a monomer, ethylene glycol dimethacrylate (EDMA) is used as a cross-linking agent, and the carbon dot modified semi-raspberry-shaped Janus particles are prepared. The semi-raspberry-shaped Janus particles with morphology and chemical anisotropy are prepared through a photo-initiation seed swelling method. The invention also provides a method for preparing a chiral carbon dot by taking citric acid and S-1, 1 '-co-2-naphthylamine / R-1, 1'-co-2-naphthylamine as precursors through a hydrothermal method, and grafting the chiral carbon dot onto the half raspberry-shaped Janus particle to obtain the half raspberry-shaped Janus particle modified by the chiral carbon dot. And finally, realizing fluorescence detection of the L-lysine by the chiral carbon dot modified semi-raspberry-shaped Janus particles by using a fluorescence spectrophotometric method.

The invention discloses a quinoxalinone boride with efficient bi-state luminescence and preparation and application thereof.The material mainly takes a quinoxalinone-BF2 structure as a core, the luminescent material has the advantages that synthesis steps are simple, the preparation method is convenient, the luminescent property is excellent, the efficient bi-state photoluminescence property of a solution state and a solid state is achieved, and the luminescent material is suitable for large-scale production. The biotoxicity is low, the biocompatibility is high, and the long-time cell imaging function is realized. And the probe can become a novel biological probe molecular platform.

The invention discloses a rare earth doped upconversion single near-infrared luminescent scandium molybdate material and a preparation method thereof, and belongs to the technical field of luminescent materials. The structural formula of the up-conversion near-infrared luminescent material provided by the invention is (Sc < 1-x-y > Yb < x > Er < y >) < 2 > Mo < 3 > O < 12 >, x is equal to 0.1 to 0.3, and y is equal to 0.005 to 0.04. The preparation method is a high-temperature solid-phase method and comprises the following steps: weighing scandium oxide, ytterbium oxide, erbium oxide and molybdenum oxide as raw materials according to stoichiometry, uniformly mixing with absolute ethyl alcohol, drying, sufficiently grinding, pressing into sheets, presintering at 800 DEG C in a muffle furnace, heating to 1100 DEG C, and carrying out high-temperature solid-phase sintering. The prepared rare earth doped scandium molybdate up-conversion luminescent material has excellent near-infrared luminescence performance, and the regulation and control of the luminescence intensity can be realized by adjusting the rare earth doping proportion. Meanwhile, the preparation method is good in repeatability, high in yield, simple and feasible in preparation process, more energy-saving and environment-friendly in preparation process and suitable for industrial popularization.

The invention relates to a preparation method of surface-passivated red-light perovskite quantum dots, which comprises the following steps: preparing an amine sulfate solution from primary amine, sulfuric acid and an organic solvent; preparing a monovalent cation precursor from at least one of cesium carbonate, methylamine and formamidine, oleic acid and 1-octadecene; preparing a lead source precursor from lead halide, zinc halide, oleylamine, oleic acid and 1-octadecene; and thermally injecting the monovalent cation precursor into the lead source precursor, cooling, and injecting an amine sulfate solution to prepare a surface passivation red light perovskite quantum dot solution. The purpose of preparing the halogen perovskite quantum dots with excellent optical performance and good stability is achieved.

The invention discloses a gallium germanate near-infrared luminescent material, a preparation method and an LED light-emitting device. The general chemical formula of the luminescent material is Ca3Sn2Ga2GeO12: xFe < 3 + > (0lt; x is greater than or equal to 0.10), can be effectively excited by an ultraviolet or blue light band light source and emits high-intensity near-infrared light covering a range from far-infrared light to near-infrared light of 650-1000nm, and has very excellent light-emitting quantum efficiency (greater than 50%) and thermal stability (greater than 70% at 423K) compared with materials of the same type. The preparation method of the luminescent material is simple in process and environment-friendly, and the obtained product is pure in phase and stable in physicochemical property. The infrared LED light-emitting device formed by combining the light-emitting material and a commercial LED chip is excellent in light-emitting intensity, energy conversion efficiency and the like, and has wide application potential in the fields of near-infrared night vision, non-contact detection, food analysis, information anti-counterfeiting and the like.

The invention discloses a radioactive medical isotope Ra-223 stably-labeled rare earth nano diagnosis and treatment preparation as well as a preparation method and application thereof. According to the invention, by constructing a dual protection mechanism of the shell layer and the functional biomolecular layer, the Ra-223 is effectively packaged, the recoil nuclei of the Ra-223 are reserved at the tumor part and are prevented from escaping to the surrounding environment of the tumor, the safety of the Ra-223 treatment process can be enhanced, the radioactive energy is ensured to accurately act on the focus, and the treatment effect of the Ra-223 is improved. Meanwhile, the damage risk to healthy tissues is minimized.

This invention belongs to the field of near-infrared luminescent materials technology, and provides a tungstate-based broadband near-infrared luminescent material, its preparation method, and its applications. The preparation method includes: (1) weighing SrCO3, La2O3, WO3, and Bi2O3 raw material powders respectively; (2) grinding the weighed raw material powders in an agate mortar, obtaining a mixture after grinding, and pouring the mixture into a clean alumina crucible; (3) transferring the alumina crucible containing the mixture to a high-temperature box furnace for sintering to obtain the tungstate-based broadband near-infrared luminescent material. This tungstate-based broadband near-infrared luminescent material can achieve continuous control of luminescence behavior by adjusting the concentration of doped ions, the external field temperature, and the excitation wavelength. This tungstate-based luminescent material has wide applications and can be used in lighting, bioimaging, temperature sensing, anti-counterfeiting coding, multi-channel optical information storage / encryption, and many other fields.

The invention discloses a multi-element rare earth doped vanadate-based luminescent material and a preparation method thereof, and belongs to the field of rare earth luminescent material preparation. A multi-element rare earth doped vanadate-based luminescent material comprises A, B and C, A, B and C are rare earth elements, A, B and C are different, the chemical formula of the luminescent material is (AxB1-x) 1-yVO4: Cy, x is more than or equal to 0.10 and less than or equal to 1.00, and y is more than or equal to 0.01 and less than or equal to 0.10; the invention can overcome the problems of general luminous intensity, poorer stability and shorter service life of the luminescent material.

The invention discloses a long-life room-temperature phosphorescent material based on polyphosphazene and application thereof. The phosphorescent material is obtained by functionalizing tripolyphosphazene and doping the functionalized phosphor with a polyvinyl alcohol matrix. The functionalized phosphor obtained by functionalization of the tripolyphosphazene comprises THMD, THDD, THMOD or THDOD. The invention also discloses a phosphorescent film prepared from the phosphorescent material. The phosphorescent film shows excellent luminescence performance, high transparency and good processing performance. The film is applied to a flexible electronic device and a fingerprint recording technology, the doped film has extremely high mechanical flexibility and transparency, large-area preparation can be realized without generating cracks, and the application field of an organic long-life room-temperature phosphorescent material is expanded.

This application provides a light-emitting diode (LED) and its fabrication method. The LED includes a stress-relieving layer and a quantum well layer protection structure. The quantum well layer protection structure includes at least one sequentially deposited cyclic structure. Each cyclic structure includes: an AlGaN barrier layer, a first AlN protective layer, a second AlN protective layer, a first AlInN protective layer, an InGaN well layer, a second AlInN protective layer, a third AlN protective layer, and a fourth AlN protective layer sequentially deposited on the stress-relieving layer. The In content in both the first and second AlInN protective layers gradually increases from away from the InGaN well layer to closer to the InGaN well layer. By setting the first and second AlInN protective layers, a high In content is ensured in the InGaN well layer, thereby obtaining a high-quality, high-efficiency red-yellow light InGaN well layer and ensuring the luminous efficiency of the LED.

The invention provides a mercury ion detection method based on a paper chip, and belongs to the technical field of mercury ion detection. The mercury ion detection method based on the paper chip comprises the following steps: firstly preparing nanogold, then preparing graphene quantum dots, mixing the nanogold and the graphene quantum dots to obtain a nanogold-graphene quantum dot compound, and then dropwise adding the nanogold-graphene quantum dot compound to filter paper to obtain a nanogold-graphene quantum dot paper chip, the paper chip is used for detecting the mercury ion concentration of a to-be-detected sample. According to the invention, sodium borohydride is used as a reducing agent and sodium citrate is used as a stabilizer to prepare nanogold, so that the particle size of the nanogold is more controllable, the particle size of the nanogold-graphene quantum dot compound obtained by combining with the graphene quantum dots is smaller, and the nanogold-graphene quantum dot compound is more tightly combined with mercury ions during detection; and finally, the result of measuring the mercury ion concentration by adopting the paper chip is more accurate.

The invention provides a 6, 6-dimethyl-6H-benzo [cd] pyrene compound, an intermediate thereof, an organic electroluminescent device and a display device, and relates to the technical field of organic photoelectricity. The structural general formula of the 6, 6-dimethyl-6H-benzo [cd] pyrene compound is # imgabs0 #, and m and n are respectively and independently selected from 0 or 1; hydrogen atoms in the formula I are respectively and independently substituted or not substituted by deuterium atoms, F, CN, C1-C12 alkyl, C6-C30 aryl or C3-C30 aromatic heterocyclic groups. According to the present invention, the structure of the 6, 6-dimethyl-6H-benzo [cd] pyrene compound is designed, such that the obtained 6, 6-dimethyl-6H-benzo [cd] pyrene compound has excellent performance, and the organic light-emitting device prepared by using the 6, 6-dimethyl-6H-benzo [cd] pyrene compound as the light-emitting layer material has characteristics of low driving voltage, high current efficiency and long service life.

The invention discloses a 2-(N-chitosan-1,8-naphthalimide-4-yl)-N-(naphthalene-1-yl) thiosemicarbazide fluorescent probe and a preparation method and application thereof. In the method, N-chitosan-4-hydrazine-1,8-naphthalimide is used as a raw material, and reacts with 1-naphthyl isothiocyanate to prepare 2-(N-chitosan-1,8-naphthalimide-4-yl)-N-(naphthalene-1-yl) thiosemicarbazide. Under 365nm ultraviolet light irradiation, the 2-(-(N-chitosan-1,8-naphthalimide-4-yl)-N-(naphthalene-1-yl) thiosemicarbazide fluorescent probe solution does not emit fluorescence, and Hg is added thereto. 2+ After that, the fluorescent color of the solution changes from colorless to bright yellow, which is 2+ The detection limit reached 7.3×10 ‑8 M, response time 5min, as detection of Hg 2+ Fluorescent probes for ions have good application prospects.

The invention relates to the technical field of photovoltaic modules, and particularly discloses a tetraphenyl ethylene-benzotriazole derivative compound and application thereof in the photovoltaic field. The absorption spectrum of the tetraphenyl ethylene-benzotriazole derivative compound disclosed by the invention can be subjected to red shift to 420 nm, so that high-energy ultraviolet light can be completely absorbed; the maximum emission wavelength of a fluorescence emission spectrum is more than 440nm and even can reach 500nm, so that the light utilization level of the crystalline silicon solar cell is improved; the absolute light-emitting quantum efficiency is very high, and the converted wavelength can be better utilized by a photovoltaic device. The substituted tetraphenyl ethylene part contained in the derivative compound has AIE performance, and the fluorescence quenching effect of traditional small organic molecules in high concentration, solid state and aggregation state is avoided. The light conversion film can overcome the problem that the fluorescence quantum yield is remarkably reduced in the laminating process, the performance of the film is not affected when the phenomena of precipitation, agglomeration and the like of auxiliaries in the film occur, and the light conversion film is used for preparing a photovoltaic module.

This invention provides a carbazole compound, an organic electroluminescent device, and a display device, relating to the field of organic optoelectronic display technology. Through structural design of the carbazole compound, this invention yields a carbazole compound with excellent performance. The organic electroluminescent device prepared using this compound as the host material for the light-emitting layer exhibits low driving voltage and high current efficiency.

The invention discloses a carbonyl condensed boron heterocyclic compound as well as a preparation method and application thereof. The structural general formula of the carbonyl fused boron heterocyclic compound is # imgabs0 #, Ar1, Ar2, Ar3, Ar4 and Ar5 are respectively and independently selected from one of C6-C60 aromatic rings and C3-C60 heteroaromatic rings, X1, X2, X3 and X4 are respectively and independently selected from one of alkyl nitrogen, aryl nitrogen, nitrogen, oxygen, sulfur, selenium, carbonyl, sulfoxide, sulfuryl and phosphorus oxygen, and dotted lines are bonded or not bonded. The carbonyl condensed boron heterocyclic compound provided by the invention is a long-wavelength luminescence MR-TADF material with a large anti-intersystem crossing rate, and a device prepared from the material has excellent luminescence performance and good stability, and is suitable for large-scale application in the field of electroluminescence.

The utility model relates to the technical field of electronic candle production, in particular to a wick for an electronic candle. The rotating rod is manually pushed to rotate by a certain angle, so that the bulb is lighted, meanwhile, the tooth-shaped protrusions can clamp the circular protrusions of the rotating disc, the rotating rod is more compact in the rotating process, the pins make contact with the battery more tightly, and the lighting effect of the bulb is improved. The flashlight comprises a lamp tube, a lamp holder, a battery and the like, wherein a lamp holder is arranged in one lamp tube, and two batteries are placed in the lamp holder. When the two batteries are powered on, the rotating rod is manually pushed, the curved protrusion of the rotating disc can abut against the other pin, voltage in the two batteries enters the bulb through the two pins, the bulb is lighted at the moment, the rotating rod is manually pushed to rotate, the rotating disc drives the other pin to move, meanwhile, the tooth-shaped protrusion can clamp the round protrusion of the rotating disc, and the bulb is powered on. Therefore, the pins are more attached to the battery, and the lighting effect of the bulb is improved.

The invention belongs to the technical field of fluorescent ceramic preparation, and relates to an enhanced near-infrared luminescence MgAl2O4: Cr < 3 + > fluorescent ceramic and a preparation method thereof, and the preparation method comprises the following steps: dissolving Mg (NO3) 2.6 H2O, Al (NO3) 3.9 H2O and Cr (NO3) 3.9 H2O in deionized water, then adding urea, stirring and dissolving; transferring the mixed solution into a reaction kettle for hydrothermal reaction to obtain MgAl2O4: Cr < 3 + > powder; adding a sintering aid CaF2 into the MgAl2O4: Cr < 3 + > powder, and carrying out ball milling and mixing; the ball-milled powder is poured into a mold to be compacted and then put into an SPS sintering furnace to be sintered; the sintered ceramic is subjected to annealing treatment; the surface of the annealed ceramic is sequentially subjected to coarse grinding and polishing operation, and the MgAl2O4: Cr < 3 + > fluorescent ceramic is obtained. According to the method, the luminescent property of Cr < 3 + > is remarkably promoted, and meanwhile, the high density and excellent mechanical property of the ceramic are guaranteed.

The utility model discloses a warning post, which comprises a first shell, a second shell, a third shell and a fourth shell, wherein a first mounting cavity is defined in the first shell; a second mounting cavity is defined in the second shell, and the second shell is detachably connected with the first shell; the photovoltaic panel is arranged on the first shell; the lighting assembly is arranged in the second shell, and a part of the lighting assembly extends out of the second shell; the control panel is arranged in the first shell, and the control panel is electrically connected with the lighting assembly; and the warning cover is arranged on the second shell in a sleeving manner and is detachably connected with the first shell. The warning column, the first shell and the second shell are detachably connected, the warning cover and the first shell are detachably connected, and therefore the warning column can be conveniently disassembled and assembled and can be conveniently arranged on other warning columns. The photovoltaic panel absorbs energy in the daytime and is used for the lighting assembly to emit light at night, extra power consumption is reduced, the light emitting effect is better, and more electricity is saved.

The invention relates to high-purple-light-absorption yellow fluorescent powder as well as a preparation method and application thereof, the chemical expression of the high-purple-light-absorption yellow fluorescent powder is (CaSrBa) 2-xSiO4: xEu < 2 + >, and x is more than or equal to 0.01 and less than or equal to 0.5. The preparation method comprises the following steps: (1) weighing a Ca-containing compound, a Sr-containing compound, a Ba-containing compound, a Si-containing compound and an Eu-containing compound according to a stoichiometric ratio, grinding and uniformly mixing, and placing in a crucible; (2) calcining the powder obtained in the step (1) in an air atmosphere, and cooling to obtain a precursor; and (3) uniformly grinding the precursor synthesized in the step (2) again, sintering in a reducing atmosphere, and cooling to obtain the purple light high-absorption yellow fluorescent powder. Compared with the prior art, the yellow fluorescent powder covers a wider emission spectrum range, and the prepared yellow fluorescent powder is stable in physical and chemical performance and can be combined with a purple light chip to prepare a glare-free LED (light-emitting diode).

The invention relates to the technical field of solid-state lighting, and particularly discloses a far-red light-emitting material, a preparation method thereof and a light-emitting device. The general chemical formula of the luminescent material is A (2-m) / 3BmC0. 5W0. 5O3: xMn < 4 + >, and A is one or a combination of La, Gd, Lu, Sc and Y rare earth ions; b is one or a combination of Li, Na, K, Rb and Cs alkaline earth metals; c is one or a combination of Mg, Ca, Sr and Ba alkaline earth metals; 0 < = m < = 2; 0.01 mol% < = x < = 50 mol%. The powder material is prepared by adopting a high-temperature solid-phase method, and the method is simple in process, environment-friendly and low in cost. The light-emitting material can emit far-red light, and the technical problems that an existing far-red light-emitting material is few in matrix and poor in performance are effectively solved.

The invention discloses a phosphorescent iridium complex with an inherent chiral structure, a luminescent material, an organic electroluminescent device and electronic equipment, and relates to the technical field of organic photoelectric materials, the phosphorescent iridium complex has a delta-Ir (LA) (LB) 2 or lambda-Ir (LA) (LB) 2 structure, and LA is a chiral auxiliary ligand and has at least one chiral center. The corresponding iridium complex at least has two chiral centers, not only has the circularly polarized luminescence characteristic, but also can be separated through column chromatography in the preparation process, so that the separation cost and the dependence on equipment are reduced; lB is a main ligand, is a rigid ligand with a large conjugate area, can effectively inhibit structural vibration, realizes a narrow phosphorescence emission spectrum, and has high color purity.

The invention discloses heat-quenching-resistant fluorescent powder as well as a preparation method and application thereof, and belongs to the field of thermal imaging. ZrMgMo3O12 is used as a matrix, rare earth element Dy is doped to obtain the fluorescent powder which emits yellow light and has a general formula of ZrMgMo3O12: Dy, luminescence thermal quenching resistance is realized by utilizing energy transfer and defect action between the rare earth element Dy and the matrix, light sources of 292 nm, 360 nm, 393 nm and 471 nm are used for excitation, the temperature of the fluorescent powder is increased from 20 DEG C to 300 DEG C, and an image of temperature distribution is obtained by detecting the intensity and wavelength of fluorescence. The preparation method of the fluorescent powder comprises the following steps: respectively adding Dy2O3 into a mixture of ZrO2, MgO and MoO3, adding ethanol, and grinding to obtain a mixed material A; and calcining the mixed material A to obtain the ZrMgMo3O12: Dy fluorescent powder.