日本夏普公司采用独立的发光层研制成高亮度的绿色、红色场致发光器件。为了使场致发光器件多色化,该公司通过在 ZnS层中掺杂稀土类元素的氟化物得到了特有的发光颜色。掺杂的元素是 ZnS:TbF_3(绿色)和 CaS:Eu(红色),实现了场致发光器件的高亮度化。绿色场致发光器件的构造是:在玻璃衬底上形成透明电极、绝缘膜、激发层、绝缘层、反向电极;通过在氩气中溅射各自的混合粉末形成发光层,选择由 SiO_2、Si_3N_4、Al_2O_3、Y_2O_3等组成的单层或复合膜作为上下 Japan’s Sharp Corporation developed using a separate light-emitting layer of high-brightness green, red electroluminescent devices. In order to colorize electroluminescent devices, the company achieved its unique luminescent color by doping rare earth element fluorides in the ZnS layer. The doped elements are ZnS: TbF_3 (green) and CaS: Eu (red), achieving high brightness of the electroluminescent device. The green electroluminescent device is constructed by forming a transparent electrode, an insulating film, an excitation layer, an insulating layer, and a counter electrode on a glass substrate, forming a light emitting layer by sputtering each mixed powder in argon gas, Si_3N_4, Al_2O_3, Y_2O_3, or other single-layer or composite film as the upper and lower