Patent ID: 8901539

Claim:
An organic EL device comprising a pair of electrodes, and a first luminescent layer and a second luminescent layer adjacent to each other and located between the pair of electrodes, the first luminescent layer comprising, in one layer, a blue phosphorescent material having a luminescence peak in a range of from 420 nm to less than 500 nm and a charge-transporting material having a lowest excited triplet energy level (T 1 ) of 2.7 eV or more, each of which is mixed within the entire first luminescent layer; the second luminescent layer comprising, in one layer, a green phosphorescent material having a luminescence peak in a range of from 500 nm to less than 570 nm and a red phosphorescent material having a luminescence peak in a range of from 570 nm to 650 nm, each of which is mixed within the entire second luminescent layer; and the T 1 of the charge-transporting material being higher than the T 1 of the blue phosphorescent material by 0.08 eV or more.