Light-Emitting Element, Lighting Device, Light-Emitting Device, and Electronic Apparatus
申请人:Ushikubo Takahiro
公开号:US20100148166A1
公开(公告)日:2010-06-17
The light-emitting element comprises a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode, in which a first layer, a second layer, and a third layer are stacked from the first electrode side, the first layer contains a first light-emitting substance and a first organic compound, the second layer contains a second light-emitting substance and a second organic compound, the third layer contains the first light-emitting substance and a third organic compound, the amount of the first light-emitting substance is larger than the amount of the first organic compound, the amount of the second organic compound is larger than the amount of the second light-emitting substance, and the amount of the third organic compound is larger than the amount of the first light-emitting substance. A light-emitting element with such a structure can have high emission efficiency.
发光元件包括第一电极、第二电极和位于第一电极和第二电极之间的发光层,其中从第一电极侧堆叠了第一层、第二层和第三层,第一层包含第一发光物质和第一有机化合物,第二层包含第二发光物质和第二有机化合物,第三层包含第一发光物质和第三有机化合物,第一发光物质的量大于第一有机化合物的量,第二有机化合物的量大于第二发光物质的量,第三有机化合物的量大于第一发光物质的量。这样结构的发光元件可以具有高发射效率。