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

摘要

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.