Ultraviolet-blue electroluminescence from Gd3Ga5O12 : Ag

UV-blue light was obtained from a thin-film electroluminescence device usin g Gd3Ga5O12:Ag as a light-emitting layer, which was deposited by using elec tron-beam evaporation. The crystal composition and structure of Gd3Ga5O12:A g were studied by x-ray powder diffraction, The Gd3Ga5O12:Ag has a photolum inescence emission which peaked at around 397 and 467 nm, which were attrib uted to the oxide vacancies and Ag+, respectively. The brightness of 32 cd/ m(2) was obtained when an alternating voltage of 130 V at 1 kHz was applied . (C) 2000 American Institute of Physics. [S0003-6951(00)05031-2].