A luminescent composition of matter is characterized by the formula REM.sub.2+xE.sub.y, where RE may be one or more Rare Earth elements (for example, Eu or Gd), M may be one or more elements selected from the group Al, Ga, B, In, Sc, Lu, and Y; E is one or more elements selected from the group S, Se, O, and Te; x is greater than zero; and y has the value that achieves charge balance in the formula assuming that E has a charge of 2.

Provided are a phosphor-containing capable of suppressing deterioration of phosphors and can be manufactured with high efficiency and a backlight unit. Specifically, provided is a phosphor-containing film 1, including a first substrate film 10; and a phosphor-containing layer 30 at which a plurality of regions 35 containing phosphors 31, which, if exposed to oxygen, deteriorate by reacting with the oxygen, are discretely disposed on the first substrate film 10, and at which a resin layer 38 having an impermeability to oxygen is disposed between the discretely disposed regions 35 containing phosphors 31, in which a width S of the resin layer 38 between the regions 35 containing phosphors 31 is 0.01S<0.5 mm, and wherein a ratio of a volume Vp of the regions containing phosphors, to a sum of the volume Vp and a volume Vb of the resin layer in the phosphor-containing layer, is 0.1Vp/(Vp+Vb)<0.9.

A method is for the production of a scintillator fiber. In an embodiment, the method includes provisioning a suspension of a binder dissolved in a solvent and a scintillator material; and pressing the suspension into a precipitation bath in which the binder is insoluble.

A phosphor includes a phosphor body including a phosphor phase formed of A.sub.3B.sub.5O.sub.12:Ce having a garnet structure, a matrix phase having a refractive index higher than a refractive index of the phosphor phase, and an oxide layer provided between the phosphor phase and the matrix phase. The oxide layer includes a composite oxide of a metal contained in the phosphor phase and a metal contained in the sintering additive. A content of the oxide layer is equal to or more than 0.1 vol % and is equal to or less than 0.9 vol % in a volume ratio with respect to the phosphor body. A is at least one selected from a group including Lu, Gd, Tb, Ga, and Y, and B is Al.

A production method of rare earth oxysulfide comprising a step of mixing a rare earth compound with sulfuric acid and/or sulfate in such a proportion that sulfate ions are 0.75-1.75 mol to 1 mol of a rare earth element, thereby preparing a reaction solution to obtain a product; a step of calcining the product to obtain calcined powder; and a step of reducing the calcined powder to obtain rare earth oxysulfide.

A method of forming a lanthanide or transition metal doped metal halide perovskite material whereby the method includes combining a monovalent metal cation-halide compound, a divalent metal cation-halide compound, and a lanthanide or transition metal halide compound in a solvent; evaporating the solvent to form a powder; and annealing the powder to form the lanthanide or transition metal doped metal halide perovskite material. The resultant materials or devices may be applied to various industrial applications or implemented as a scintillator and applied to various industrial applications.

A light-emitting element includes a hole transport layer between a light-emitting layer and an anode, the hole transport layer containing either a metal oxide of (NiO).sub.1-x(LaNiO.sub.3).sub.x (composition formula 1) or (Cu.sub.yO).sub.1-x(LaNiO.sub.3).sub.x (composition formula 2), where 0<x1 and 1y2.

The present invention provides a scintillator panel including: a plate-like substrate; a barrier rib provided on the substrate; and a scintillator layer including a phosphor filled in cells divided by the barrier rib, wherein the barrier rib is formed of a material which is mainly composed of a low-melting-point glass containing 2 to 20% by mass of an alkali metal oxide, a value obtained by dividing a top width Lt of the barrier rib or a 90%-height width L90 of the barrier rib by a half-value width Lh of the barrier rib is 0.45 to 1, and a value obtained by dividing a bottom width Lb of the barrier rib or a 10%-height width L10 of the barrier rib by the half-value width Lh is 1 to 3.

A colored contact lens includes an iris region made of a first mixed liquid, and the first mixed liquid includes a colored material and a contact lens material. The colored material absorbs and stores light when in a well lit environment and emits lights when in a poorly lit environment or a dark environment. Therefore, when the colored contact lens is located in a well lit environment, light is absorbed and stored, and when the contact lens is in a poorly lit environment or the dark environment light is emitted.

The present invention relates to an application control composition comprising an indicator, wherein the indicator is modifiable and comprises at least one organic compound having a conjugated binding system, an organometallic compound or an inorganic compound. It further relates to an application control method and to the use of the composition according to the invention.