Organic electroluminescent display device

摘要

An organic EL display device includes an organic EL element having a first light-emitting portion, a second light-emitting portion, an n-type charge-generation layer, and a p-type charge-generation layer. The first light-emitting portion has a first light-emitting layer and a hole-injection layer. The first light-emitting layer is formed between an anode and a cathode. The hole-injection layer is made of amorphous carbon and in contact with the anode. The second light-emitting portion has a second light-emitting layer, which is formed between the first light-emitting portion and the cathode. The n-type charge-generation layer is formed between the first and second light-emitting portions. The n-type charge-generation layer is in contact with the first light-emitting portion. The p-type charge-generation layer is made of amorphous carbon and formed between the n-type charge-generation layer and the second light-emitting portion. The p-type charge-generation layer is in contact with the second light-emitting portion.

主权项

1. An organic EL display device including an organic EL element, the organic EL element comprising:
an anode electrode made of a conductive material; a cathode electrode made of a conductive material; a first light-emitting portion having a first light-emitting layer and a hole injection layer, the first light-emitting layer being formed between the anode electrode and the cathode electrode to emit light in response to a potential difference applied between the anode electrode and the cathode electrode, the hole injection layer being made of amorphous carbon and in contact with the anode electrode; a second light-emitting portion having a second light-emitting layer, the second light-emitting layer being formed between the first light-emitting portion and the cathode electrode to emit light in response to the potential difference applied between the anode electrode and the cathode electrode; an n-type charge generation layer formed between the first light-emitting portion and second light-emitting portion, the n-type charge generation layer being in contact with the first light-emitting portion to supply electrons to the first light-emitting portion; and a p-type charge generation layer made of amorphous carbon and formed between the n-type charge generation layer and the second light-emitting portion, the p-type charge generation layer being in contact with the second light-emitting portion to supply holes to the second light-emitting portion.