A scintillator panel includes a substrate made of an organic material, a barrier layer formed on the substrate and including thallium iodide as a main component, and a scintillator layer formed on the barrier layer and including cesium iodide as a main component. According to this scintillator panel, moisture resistance can be improved by providing the barrier layer between the substrate and the scintillator layer.

Provided are a scintillator panel and an X-ray detector which have high sensitivity and sharpness. The scintillator panel includes a substrate and a scintillator layer containing a binder resin and a phosphor, wherein the scintillator panel further contains an organic compound having the maximum peak wavelength of light emission in the wavelength region of from 450 to 600 nm.

A nanocrystal scintillator that contains a thin-film layer of perovskite-based quantum dots coated on a substrate layer. The quantum dots each have a formula of CsPbX.sub.aY.sub.3-a, CH.sub.3NH.sub.3PbX.sub.3, or NH.sub.2CH═NH.sub.2PbX.sub.3, in which each of X and Y, independently, is Cl, Br, or I, and a is 0-3. The substrate layer is an aluminum substrate, a fluoropolymer substrate, a fiber optic plate, a ceramic substrate, or a rubber substrate. Also disclosed are an ionizing radiation detector and an ionizing radiation imaging system containing such a nanocrystal scintillator.

A fluorescent screen is configured to convert an X-ray into visible light to one embodiment. The screen includes a gadolinium oxysulfide phosphor activated with praseodymium and cerium. The phosphor contains praseodymium having a concentration of 0.01 mass % or more and 0.3 mass % or less and cerium having a concentration of 5 ppm or more and 30 ppm or less. An average particle diameter of the phosphor is 10 μm or more and 20 μm or less. A weight per unit area of the phosphor is 270 mg/cm.sup.2 or more and 380 mg/cm.sup.2 or less.

A compound of Chemical Formula 1, and an organic photoelectric device, an image sensor, and an electronic device including the same are disclosed:

##STR00001##

In Chemical Formula 1, each substituent is the same as described in the detailed description.

A charged particle detection material which can detect charged particles due to a discharge phenomenon or the like caused even in a very low voltage which cannot be observed by a prior art, as well as a charged particle detection film and a charged particle detection liquid using the material. The charged particle detection material and the charged particle detection film contain at least one of a fluorescent substance, a luminescent substance, an electroluminescent substance, a fractoluminescent substance, a photochromic substance, an afterglow substance, a photostimulated luminescent substance and a mechanoluminescent substance and can easily detect emission or incidence of charged particles in real time.

A scintillator panel includes a substrate, a resin protective layer formed on the substrate and made of an organic material, a barrier layer formed on the resin protective layer and including thallium iodide as a main component, and a scintillator layer formed on the barrier layer and including cesium iodide with thallium added thereto as a main component. According to this scintillator panel, moisture resistance can be improved due to the barrier layer provided therein.

Disclosed is a scintillator panel comprising a substrate, a grid-like barrier rib formed on the substrate, a phosphor layer in cells divided by the barrier rib, and a reflective layer surrounding the side and the bottom of the phosphor layer, the scintillator panel comprising a part where the reflective layer surrounding the side of the phosphor layer is curved and a part where opposing surfaces of the reflective layer at the side of the phosphor layer are approximately parallel, wherein a ratio in a width direction of a part where the reflective layer at the bottom of the phosphor layer is curved to a part where the reflective layer at the bottom of the phosphor layer is flat is 10.0:0 to 1.0:9.0. The brightness of the scintillator panel is improved.

A compound of Chemical Formula 1, and an organic photoelectric device, an image sensor, and an electronic device including the same are disclosed: ##STR00001## In Chemical Formula 1, each substituent is the same as described in the detailed description.

Chemically-modified silicone-based matrices for use in radiation detection. The base matrix is capable of multi-modal particle detection via pulse shape discrimination (PSD), relying in differences in the interaction mechanics between various types of radiation and the matrix itself to produce light with characteristic properties dependent on the incident particle type and energy. The materials, radiation detection devices using the materials, and methods of using the materials as radiation detectors.