Patent ID: 7695828

Claim:
An electroluminescent element comprising: a pair of electrodes; and an electroluminescent layer comprising a host material and a guest material and provided between said pair of electrodes, wherein each of said host material and said guest material is a compound having a skeleton represented by the general formula 1: Formula 1 wherein, in the guest material: R 1 is a hydrogen atom, a lower alkyl group, an aryl group which may have a substituent, or a heterocyclic group which may have a substituent, and R 2 to R 5 , each of which may be the same or different, are individually a hydrogen atom, a halogen atom, a lower alkyl group, an alkoxy group, an acyl group, a nitro group, a cyano group, an amino group, a dialkylamino group, a diarylamino group, a vinyl group which may have a substituent, an aryl group which may have a substituent, or a heterocyclic group which may have a substituent, and Ar 1 is an aryl group which may have a substituent, or a heterocyclic group which may have a substituent, and wherein, in the host material: R 1 is a hydrogen atom, a lower alkyl group, an aryl group which may have a substituent, or a heterocyclic group which may have a substituent, three of R 2 to R 5 , each of which may be the same or different, are individually a halogen atom, a lower alkyl group, an alkoxy group, an acyl group, a nitro group, a cyano group, an amino group, a dialkylamino group, a diarylamino group, a vinyl group which may have a substituent. an aryl group which may have a substituent, or a heterocyclic group which may have a substituent, and Ar 1 is an aryl group which may have a substituent, or a heterocyclic group which may have a substituent, and one of R 2 to R 5 is a hydrogen atom.