| 摘要 |
<p>A thin-film EL element which is constructed to produce blue light of high brightness on a low voltage. The thin-film EL element is composed of a light-emitting member of SrS that contains Ce, K and Cl as luminescence center impurities. The concentration of Ce in the light-emitting member is 0.5 % to 1.0 %, and the ratio of Cl to Ce (Cl/Ce) is 2 or smaller. Further, the light-emitting layer, Sr, S, Ce and KCl are vaporized from four different sources, and are coupled together on the substrate by the multiple vapor deposition method. <IMAGE></p> |
