| abstract |
In the organic electroluminescent device aimed at high durability, it is an object to provide a useful organic electroluminescent device light emitting agent and its use, and the light emitting auxiliary agent for organic electroluminescent devices using a specific coumarin derivative, and its organic electroluminescence The above problems are solved by providing an organic electroluminescent element using an elemental auxiliary, and a display panel and an information display apparatus using the organic electroluminescent element. |