ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL LIGHTING AND ORGANIC EL DISPLAY

摘要

The object of the invention is to provide an organic electroluminescent element comprising a hole blocking layer capable of achieving a lower driving voltage. The invention relates to an organic electroluminescent element comprising: an anode, a cathode, a first luminescent layer formed by a wet film forming method, and a second luminescent layer formed by a vacuum evaporation method, wherein the first luminescent layer contains a phosphorescent material of a low-molecular-weight compound and a first charge transporting material, and the second luminescent layer contains a fluorescent material of a low-molecular-weight compound and a second charge transporting material, and the hole blocking layer, which is adjacent to the cathode side of the second luminescent layer, contains a specific compound.

主权项

1. An organic electroluminescent element comprising an anode, a cathode, and a plurality of light emitting layers formed between the anode and the cathode,
wherein the plurality of light emitting layers includes a first light emitting layer formed by using a wet film forming method, and a second light emitting layer formed by using a vacuum evaporation method, in this order from the anode side, the first light emitting layer contains a phosphorescent material and a first charge transporting material, both of which are a low-molecular-weight compound, the second light emitting layer contains a fluorescent material and a second charge transporting material, both of which are a low-molecular-weight compound, the organic electroluminescent element includes a hole blocking layer adjacent to the cathode side of the second light emitting layer, and the hole blocking layer contains a compound represented by the following formula (1):wherein X represents C or N, Ar1 and Ar2 each independently represents an optionally substituted aromatic ring group, R1 represents an optionally substituted organic group of 50 or less carbon atoms, and may be the same or different when a plurality of R1 exists, and m represents an integer of 0 to 5.