Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device
摘要
說明書
Light-emitting elements (organic EL elements) including organic compounds and utilizing electroluminescence (EL) have been put to more practical use. In the basic structure of such light-emitting elements, an organic compound layer containing a light-emitting material (an EL layer) is interposed between a pair of electrodes. Carriers are injected by application of voltage to the element, and recombination energy of the carriers is used, whereby light emission can be obtained from the light-emitting material.
The light-emitting elements are self-luminous elements and thus have advantages such as high visibility and no need for backlight when used as pixels of a display, and are suitable as flat panel display elements. Displays including such light-emitting elements are also highly advantageous in that they can be thin and lightweight. Moreover, such a light-emitting element also has a feature that response speed is extremely fast.
Since light-emitting layers of such light-emitting elements can be successively formed two-dimensionally, planar light emission can be achieved. This feature is difficult to obtain with point light sources typified by incandescent lamps and LEDs or linear light sources typified by fluorescent lamps. Furthermore, light emission from an organic compound can be light emission which does not include UV light by selecting a material; thus, light-emitting elements also have great potential as planar light sources used in lighting devices and the like.
