Provided are a polycrystalline phosphor film applicable to a high-power optical device, a preparation method therefor, and a vehicle lamp device using the same, wherein the polycrystalline phosphor film comprises a plurality of phosphor crystals and pores formed between the phosphor crystals, and the phosphor crystal can be a synthesized product comprising at least one rare earth material and cerium (Ce). In addition, the method for preparing a polycrystalline phosphor film can comprise the steps of: preparing a phosphor powder comprising a plurality of phosphor particles; injecting the phosphor powder into a predetermined mold so as to mold the same into a predetermined shape; generating a sintered body by primarily sintering, at a first temperature, the phosphor powder having the predetermined shape; secondarily sintering the sintered body, having been primarily sintered, at a second temperature lower than the first temperature; and forming a polycrystalline phosphor film by processing the sintered body having been secondarily sintered.

Disclosed is a method for manufacturing crystals of aluminates of one or more element(s) other than aluminium, referred to as A. The method includes: placing starting reagents, including at least one aluminium element source and a source of the element(s) A that has a degree of oxidation of between 1 and 6, in suspension in a liquid medium, forming a suspension referred to as the starting suspension; milling the starting suspension at 50 C., in a three-dimensional liquid medium ball mill for 5 minutes; recovering, at the outlet of the three-dimensional ball mill, a suspension referred to as the end suspension including the starting reagents in activated form or crystals of aluminate of the element(s) A generally in hydrated form; if required, calcination of the end suspension when it includes the starting reagents in activated form, to obtain generally non-hydrated crystals of aluminate of the element(s) A.

A light source for emitting emitted light having an SPD comprising: (a) a plurality of light emitters including at least one violet solid-state emitter, (b) at least one phosphor; wherein said light emitters and said at least one phosphor being configured such that: at least 25% of the power within the SPD is in the range 390-420 nm, and the emitted light has a chromaticity which is within a Duv distance of less than 5 points from the Planckian locus.

A phosphor, combined with LED having not exceeding 470 nm, of high emission intensity and with chemical and thermal stability is provided. The phosphor according to the present invention comprises an inorganic compound in which element A (A is one or two or more kinds of elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb) is solid solved in an inorganic crystal including at least metal element M and non-metal element X and represented by M.sub.nX.sub.n+1 (3n5), an inorganic crystal having the same crystal structure, or an inorganic crystal including a solid solution thereof. Here, M comprises at least Al and Si, and if necessary element L (L is a metal element other than Al and Si) and X comprises N, O if necessary, and element Z if necessary (Z is a non-metal element other than N and O).

A wavelength conversion phosphor having a wavelength conversion function, which is high in fluorescence output and excellent in heat resistance. The wavelength conversion phosphor including a first metal oxide phase as a phosphor phase containing activated metal ions which emit fluorescence, and a second metal oxide phase adjacent to the first metal oxide phase through an interface, in which a concentration of the activated metal ions in the interface is higher than a concentration of the activated metal ions contained in the first metal oxide phase.

A halide material, such as scintillator crystals of LaBr.sub.3:Ce and SrI.sub.2:Eu, with a passivation surface layer is disclosed. The surface layer comprises one or more halides of lower water solubility than the scintillator crystal that the surface layer covers. A method for making such a material is also disclosed. In certain aspects of the disclosure, a passivation layer is formed on a surface of a halide material such as a scintillator crystal of LaBr.sub.3:Ce of SrI.sub.2:Eu by fluorinating the surface with a fluorinating agent, such as F.sub.2 for LaBr.sub.3:Ce and HF for SrI.sub.2:Eu.

The invention relates to the field of lighting technology and addresses the issues of poor light efficiency and stability in existing full spectrum white light LED implementations, which provides a full spectrum semiconductor lighting device and health lighting fixture, which includes: blue light LED chips and fluorescent powders. The blue light LED chips comprise at least a first and second blue light chip, each with peak wavelengths within a specific wavelength range, differing from each other. The fluorescent powders include first, second, third, and fourth fluorescent powders, each with peak wavelengths in distinct wavelength ranges. Through the synergistic use of chips and fluorescent powders, the invention enables the resulting full spectrum lighting devices to have higher light efficiency and stability.

A family of optionally substituted oxonitridoberyllosilicate photoluminescent compositions (i.e., phosphors) is characterized by the formula AE.sub.1?x?y?uA.sub.y+uBe.sub.1?y?z?vB.sub.y+z+vSi.sub.1?z Al.sub.zO.sub.1?vN.sub.2+v: Eu.sub.x,Ce.sub.u, where AE=Ba, Sr, Ca, Mg; A=Li, Na, K, Rb; 0?x?0.1; 0? u?0.1; 0<(x+u); 0?y?1; 0?z?1; (y+z+v)?1; and (x+y+u)?1. These phosphors may be used in phosphor converted LEDs which may be advantageously employed in illumination and display applications, for example.

There is provided a scintillator array to be used for a neutron detector capable of detecting high energy neutrons with high definition and high efficiency. A scintillator array comprises a structure including a plurality of stacks layered each other. Each of the stacks has in sequence: a light reflector including ceramics or single-crystal silicon; a first film to react with a neutron incident along a direction intersecting a lamination direction of the stacks and thus emit a radiation ray; a second film including a material to reflect light; and a scintillator to emit light in response to the radiation ray. The light from the scintillator is reflected by the reflector and the second film to propagate an inside of the scintillator and thus to be led to an outside of the structure.

An outdoor luminaire comprising a blue LED chip having a maximum peak at a wavelength of 420-480 nm and a phosphor layer disposed forward of the LED chip in its emission direction is provided. The phosphor layer comprises a phosphor of the formula: Lu.sub.3Al.sub.5O.sub.12:Ce.sup.3+ which is activated with up to 1 mol % of Ce relative to Lu, the phosphor being dispersed in a resin. In scotopic and mesopic vision conditions, the luminaire produces illumination affording brighter lighting, higher visual perception and brightness over a broader area.