| abstract |
In the present invention, an electron injection composition for a light-emittingnelement, comprising a benzoxazole derivative represented by general formula 1 and atnleast one of an alkali metal, an alkali earth metal, and a transition metal, is used to formnan electron injection layer in a portion of a layer including luminescent material in anlight-emitting element, and it is an object of the present invention to provide, by usingnthe composition, a light-emitting element that has more superior characteristics and anlonger lifetime as compared to conventional ones.n nwherein Ar represents an aryl group, and each of R 1 to R 4 represents hydrogen, halogen,na cyano group, an alkyl group having 1 to 10 carbon atoms, a haloalkyl group having 1nto 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a substituted ornunsubstituted aryl group, or a substituted or unsubstituted heterocyclic group. |