Organic electroluminescence device and luminescence apparatus

摘要

The invention provides an organic EL device including a pair of electrodes and at least one luminescent layer between the pair of electrodes, the at least one luminescent layer including at least two phosphorescent materials, an electrically inert material, and a charge-transporting material, the at least two phosphorescent materials being selected from a blue phosphorescent material having a luminescence peak in a range of from 420 nm to less than 500 nm, a green phosphorescent material having a luminescence peak in a range of from 500 nm to less than 570 nm, or a red phosphorescent material having a luminescence peak in a range of from 570 nm to 650 nm. The invention also provides a luminescence apparatus including the above organic EL device.

主权项

1. An organic EL device comprising a pair of electrodes and a luminescent layer between the pair of electrodes, the luminescent layer comprising at least two phosphorescent materials, an electrically inert material, and a charge-transporting material,
wherein the at least two phosphorescent materials are selected from the group consisting of a blue phosphorescent material having a luminescence peak in a range of from 420 nm to less than 500 nm, 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, wherein the at least two phosphorescent materials, the electrically inert material, and the charge-transporting material are co-deposited and have substantially uniform concentrations in the luminescent layer; and wherein the ratio of minimum luminescence spectrum to maximum luminescence spectrum of the at least two phosphorescent materials emitted from the device is within the range of from 5:95 to 50:50.