Optical, luminescence, and scintillation properties of ZnO and ZnO:Ga ceramics

摘要

Uniaxial hot pressing has been used to obtain ceramics based on zinc oxide,and their optical, x-ray-structure, luminescence, and scintillationcharacteristics have been studied. It is shown that, by changing theconcentration of the dopant (Ga) and the codopant (N), it is possible to changethe intensities of the edge band (397.5 nm) and the intraband luminescence (510nm) of the ZnO luminescence, as well as their ratio. Undoped ZnO ceramic hasgood transparency in the visible region and fairly high luminous yield: 9050photons per MeV. Ceramic ZnO:Ga possesses intense edge luminescence with afalloff time of about 1 ns.