Light-emitting material, scintillator containing the light-emitting material, x-ray detector equipped with the scintillator, image display device using the light-emitting material, and light source using the light-emitting material
AssigneeKabushiki Kaisha Toshiba
InventorNaotoshi Matsuda
Life of this patent
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Abstract
It is made possible to provide a light-emitting material having a short decay time of 10 μs or less and an emission wavelength of 650 nm or longer. A light-emitting material includes a material having a composition represented by ARS2:Eu, wherein A represents at least one element selected from Na, K, Rb, and Cs, and R represents at least one element selected from Y, La, Gd, and Lu.
Claims11
A light-emitting material comprising a material having a composition represented by ARS2:Eu, wherein A represents at least one element selected from Na, K, Rb, and Cs, and R represents at least one element selected from Y, La, Gd, and Lu, wherein the material has a short decay time of 10 μl or less and an emission wavelength of 650 nm or longer, and the half-width of the emission spectrum of the material is in the range of 0.25 eV to 0.35 eV.
An image display device comprising:
- a first substrate;
- a red light-emitting pixel for emitting red light, a green light-emitting pixel for emitting green light, and a blue light-emitting pixel for emitting blue light which are provided on the first substrate;
- a second substrate provided so as to be opposed to the surface of the first substrate where the pixels are provided;
- and
- a plurality of electron beam sources, each of which corresponds to each of the pixels and is provided on the surface of the second substrate opposed to the first substrate to emit an electron beam toward the corresponding pixel, wherein the blue-light emitting pixel contains a light-emitting material activated with Bi, the light-emitting material having a composition represented b ARS2:Bi wherein A represents at least one element selected from Na, K, Rb, and Cs and R represents at least one element selected from Y, La, Gd, and Lu.
A light source comprising:
- a light-emitting material activated with Bi and Pr, having a composition represented by ARS2:Bi, Pr, wherein A represents at least one element selected from Na, K, Rb, and Cs and R represents at least one element selected from Y, La, Gd, and Lu;
- and
- a light-emitting device for irradiating the light-emitting material with light having a peak wavelength of 400 nm or less to excite the light-emitting material.
Dependencies are inferred from the claim text.