An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer includes an emission layer and at least one organometallic compound of Formula 1. ##STR00001## An organic light-emitting device including an organometallic compound of Formula 1 may have low driving voltage, high efficiency, and excellent color purity.

A light-emitting element that emits light with high color purity, a light-emitting element that emits light at high emission efficiency, or a light-emitting element with reduced power consumption. The light-emitting element includes a first electrode, a second electrode, and an EL layer. The first electrode is configured to reflect light. The second electrode is configured to reflect light and transmit light. The EL layer is between the first electrode and the second electrode. The EL layer includes a guest material. The guest material is configured to convert triplet excitation energy into light emission. The emission spectrum of the guest material in a dichloromethane solution has a peak in a wavelength region ranging from 440 nm to 470 nm and has a full width at half maximum of greater than or equal to 20 nm and less than or equal to 80 nm.

The present invention identifies ? decay and other events included in the emission of an LaBr.sub.3 scintillator and only collects ? ray events. An LaBr.sub.3 scintillation detector is provided with an LaBr3 scintillator 10, a photomultiplier tube 12, an oscilloscope 14, and a computer 18. The computer 18 detects a peak value Vp and a total charge amount Q.sub.total of a voltage waveform signal and calculates an error propagation expression function for a ratio of the peak value Vp to the total charge amount Q.sub.total. This error propagation expression function is used as a threshold function for identifying and removing ? decay events. The ? decay events are identified from the peak value Vp and total charge amount Q.sub.total, which are measurement values that can be measured in real time.

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.

Embodiments of a display device are described. The display device includes a backlight unit having a light source, a quantum dot film, and a radiation absorbing element. The quantum dot film is optically coupled to the light source and is configured to process light received from the light source. The radiation absorbing element is optically coupled to the quantum dot film and is configured to tune a spectral emission width of the processed light received from the quantum dot film to achieve over 90% color gamut coverage of a standard RGB color space

An amine-based compound and an organic light-emitting device, the amine-based compound being represented by Formula 1 below: ##STR00001##

A condensed cyclic compound represented by Formula 1:
Ar.sub.1-L.sub.1-L.sub.2-Ar.sub.2Formula 1 wherein in Formula 1, Ar.sub.1, Ar.sub.2, L.sub.1, and L.sub.2 are the same as described in the specification.

Provided are a scintillator with improved energy sensitivity dependence within the energy range of diagnostic X-rays, more specifically in the range of 40-150 kV, and a radiation dosimeter using same. Due to the scintillator comprising a photopolymer resin that contains a polymerizable monomer, a filler, and a photopolymerization initiator, energy sensitivity dependence within the range of 40-150 kV is improved. Furthermore, changes in relative sensitivity within this energy range can be reduced to 3% or less by containing an inorganic fluorescent substance such as Zn.sub.2SiO.sub.4.

A wavelength conversion device includes: a substrate; and a phosphor layer on the substrate. The phosphor layer includes: a base material; phosphor particles which emit fluorescent light when excited by excitation light; and light transmissive particles each having a grain size that is within 30% of a grain size of each of the phosphor particles, and a refractive index that is within 7% of a refractive index of the base material.

A wavelength conversion device includes: a substrate; and a phosphor layer on the substrate. The phosphor layer includes: a base material; phosphor particles which emit fluorescent light when excited by excitation light; and light transmissive particles each having a grain size that is within 30% of a grain size of each of the phosphor particles, and a refractive index that is within 7% of a refractive index of the base material.