Patent ID: 7862909

Claim:
An organic electroluminescent element comprising an anode and a cathode having therebetween an emission layer containing a phosphorescent compound and an layer adjacent to the emission layer, the layer adjacent to the emission layer being provided between the emission layer and the cathode, wherein the layer adjacent to the emission layer exhibits an effect of blocking holes and comprises a compound having at least one electron withdrawing group represented by â€”CF 3 , and exhibiting a HOMO level of âˆ’5.7 to âˆ’7.0 eV and a LUMO level of âˆ’1.3 to âˆ’2.3 eV, wherein the compound comprised in the layer adjacent to the emission layer is represented by a formula selected from the group consisting of Formulas (2), (6), (11) and (12): wherein Ar 4 -Ar 9 each represent a phenyl group having â€”CF 3 as a substituent, and R 1 -R 3 each independently represent a hydrogen atom; wherein R 14 -R 21 each independently represent a hydrogen atom or a phenyl group having â€”F or â€”CF 3 as a substituent, and R 22 represents a phenyl group having â€”CF 3 as a substituent or a biphenyl group having â€”CF 3 as a substituent; wherein Ar 20 -Ar 25 each represent a phenyl group having â€”F as a substituent, and A 1 -A 3 each represent a phenylene group having â€”CF 3 as a substituent; and wherein Ar 26 -Ar 29 each represent a phenyl group having â€”F or â€”CF 3 as a substituent, B 1 and B 3 each represent a phenylene group, and B 2 represents a divalent linking group selected from the group consisting of â€”C(CF 3 ) 2 â€”, â€”C(CN) 2 â€” and â€”C(CH 3 ) 2 â€”C 6 H 4 â€”C(CH 3 ) 2 â€”.