CE³⁺ activated luminescent compositions for application in imaging systems

摘要

A luminescent composition includes a host matrix sensitized by Ce³⁺ and showing emission in the ultraviolet range. Typical host matrices include fluorides, sulphates, and phosphates, in particular A(Y_1-x-yLu_xLa_y)F₄, A(Y_1-x-yLu_xLa_y)₃F₁₀, BaCa(Y_1-x-yLu_xLa_y)₂F₁₀, and Ba(Y_1-x-yLu_xLa_y)₂F₈, wherein A=Li, Na, K, Rb, or Cs. One or more of these luminescent compositions may be applied as a ceramic or single crystalline converter for CT, PET or SPECT scanners, or as a luminescent powder layer for x-ray intensifying screens.