摘要:
An object of the present invention is to prepare a fine particle with high durability and high brightness, in which semiconductor nanoparticles are assembled. The present invention provides fluorescent fine particles comprising Cd- and Se-containing semiconductor nanoparticles dispersed in silicon-containing fine particles, wherein the average particle size of the silicon-containing fine particles is 20 to 100 nm, and the number of semiconductor nanoparticles dispersed in the silicon-containing fine particles is 10 or more.
摘要:
The present invention provides a novel fluorescent material which has a luminance higher than that of the conventional rare earth ion-dispersed fluorescent materials and is excellent in light resistance and long-term stability, and also an optical device, such as a high-luminance display panel or lighting equipment, which uses such a fluorescent material. Semiconductor ultrafine particles are characterized by maintaining 50% or more fluorescence quantum yield of photoluminescence when they are kept dispersed in water at 10° C. to 20° C. in air for 5 days. The fluorescent material is obtained by dispersing such semiconductor ultrafine particles in a glass matrix using a sol-gel process.
摘要:
The present invention provides a luminescent fiber, which retains a certain shape with assembled nanoparticles, and a method for producing the luminescent fiber. Specifically, the present invention provides a luminescent fiber comprising silicon and semiconductor nanoparticles having a mean particle size of 2 to 12 nm, the luminescent fiber having a diameter of 20 nm to 2 μm, a length of 40 nm to 500 μm, an aspect ratio of 2 to 1,000, and photoluminescence efficiency of not less than 5%.
摘要:
The present invention provides a thin-film fluorescent material in which semiconductor nanoparticles in a stable condition maintain a high fluorescence quantum yield and can be held at a high concentration in a glass matrix. The present invention also provides optical devices using the thin-film fluorescent material, such as high-brightness displays and lighting systems. The present invention relates to a fluorescent material, in which semiconductor nanoparticles with a fluorescence quantum yield of 15% or more and a diameter of 2 to 5 nanometers are dispersed in a glass matrix at a concentration of 5×10−4 mol/l or more and a method for manufacturing the same.
摘要:
The present invention provides semiconductor-nanoparticle-dispersed small silica glass particles that emit bright fluorescent light with high fluorescence quantum yield and high density, compared to the conventional semiconductor-nanoparticle-dispersed small glass particles, and that have excellent fluorescence intensity stability over time; and a process for preparing the same. The semiconductor-nanoparticle-dispersed silica glass particles have a mean particle size of not less than 10 nanometers and not more than 5 micrometers, and contain a hydrolyzed alkoxide and semiconductor nanoparticles at a concentration of not less than 2×10−5 mol/l and not more than 1×10−2 mol/l. The particles emit fluorescent light with a fluorescence quantum yield (quantum yield) of 25% or more (and 60% or more), when dispersed in a solution.
摘要:
The present invention provides a thin-film fluorescent material in which semiconductor nanoparticles in a stable condition maintain a high fluorescence quantum yield and can be held at a high concentration in a glass matrix. The present invention also provides optical devices using the thin-film fluorescent material, such as high-brightness displays and lighting systems. The present invention relates to a fluorescent material, in which semiconductor nanoparticles with a fluorescence quantum yield of 15% or more and a diameter of 2 to 5 nanometers are dispersed in a glass matrix at a concentration of 5×10−4 mol/l or more and a method for manufacturing the same.
摘要:
This invention provides a novel phosphor material that has better brightness than conventional phosphors using dispersed rare earth ions, and that possesses excellent light resistance, temporal stability, and the like, and a light-emitting device with high brightness comprising such phosphor material and an excitation ultraviolet light source corresponding to the properties thereof. A phosphor comprising a silicon-containing solid matrix and semiconductor superfine particles dispersed therein at a concentration of 5×10−4 to 1×10−2 mol/L, said semiconductor superfine particles having a fluorescence quantum yield of 3% or greater and a diameter of 1.5 to 5 nm, and a light-emitting device including said phosphor and a light source for excitation light with an intensity of 3 to 800 W/cm2.
摘要:
The present invention provides ice nucleating-active materials which are free from problems like corrosiveness against a device owing to the materials used and harmfulness of the materials themselves; and have a function of elevating freezing temperature of water which is effective for releasing an over-cooling state of it, and generates a method for an ice bank system exhibiting a large energy-saving effect. This invention relates to ice nucleating-active materials containing trioctahedral smectites capable of being dispersive in water as effective components, and a method for an ice bank system comprising adding the trioctahedral smectites into a liquid in the ice bank system at a concentration of at least 30 ppm and freezing it by using a freezer.
摘要:
This invention provides a novel phosphor material that has better brightness than conventional phosphors using dispersed rare earth ions, and that possesses excellent light resistance, temporal stability, and the like, and a light-emitting device with high brightness comprising such phosphor material and an excitation ultraviolet light source corresponding to the properties thereof. A phosphor comprising a silicon-containing solid matrix and semiconductor superfine particles dispersed therein at a concentration of 5×10−4 to 1×10−2 mol/L, said semiconductor superfine particles having a fluorescence quantum yield of 3% or greater and a diameter of 1.5 to 5 nm, and a light-emitting device including said phosphor and a light source for excitation light with an intensity of 3 to 800 W/cm2.
摘要:
The present invention provides semiconductor-nanoparticle-dispersed small silica glass particles that emit bright fluorescent light with high fluorescence quantum yield and high density, compared to the conventional semiconductor-nanoparticle-dispersed small glass particles, and that have excellent fluorescence intensity stability over time; and a process for preparing the same. The semiconductor-nanoparticle-dispersed silica glass particles have a mean particle size of not less than 10 nanometers and not more than 5 micrometers, and contain a hydrolyzed alkoxide and semiconductor nanoparticles at a concentration of not less than 2×10−5 mol/l and not more than 1×10−2 mol/l. The particles emit fluorescent light with a fluorescence quantum yield (quantum yield) of 25% or more (and 60% or more), when dispersed in a solution.