To provide an organic electroluminescent element having high electric current efficiency and light-emitting efficiency, capable of being driven by a low voltage, having excellent driving stability and heat resistance, and having stable light-emitting characteristics.
A new 2,7-diaminonaphthalene compound is expressed by general formula (I) (R1, R2, R3 and R4 are each an aromatic radical which may be substituted, or R1 and R2 are together combined to be formed into a ring which may be substituted and R3 and R4 are together combined to be formed into a ring which may be substituted, provided that at least one of R1, R2, R3, R4, the ring formed by together combining R1 and R2 and the ring formed by together combining R3 and R4 is an aromatic condensed ring radical which is formed by condensing 3 or more rings and may be substituted). The organic electroluminescent element has a layer containing the 2,7-diaminonaphthalene compound.
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SHIOTANI TAKESHI
SOMA MINORU
SATO YOSHIHARU