Nitrogen-containing fused heterocyclic compound and applications thereof
The present invention provides a nitrogen-containing fused heterocyclic compound and applications thereof. When the nitrogen-containing fused heterocyclic compound of the present invention is used as a host material of an emitting layer of an organic light-emitting element, the organic light-emitting element has a lower driving voltage (3.8 V to 4.1 V), a higher current efficiency (15 Cd/A to 23 Cd/A or higher) and a longer service life (273 h or higher).
1 . A nitrogen-containing fused heterocyclic compound, wherein the nitrogen-containing fused heterocyclic compound has a structure represented by Formula (1):
wherein,
Ar is selected from
Ar 2 is selected from a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group, a phenylnaphthyl group, a naphthylphenyl group, an anthryl group, a phenanthryl group, a benzophenanthryl group, a pyridyl group, a dibenzofuryl group, a dibenzothiophenyl group, a carbazolyl group, a phenylcarbazolyl group, a pyridylcarbazolyl group, a naphthylcarbazolyl group, a biphenylylcarbazolyl group, a dibenzofurylphenyl group, a dibenzothiophenylphenyl group, a dimethylfluorenyl group, a diphenylfluorenyl group, a spiro-bifluorenyl group, a benzonaphthofuryl group, a benzonaphthothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each of which is substituted or unsubstituted;
L is selected from a phenylene group, a biphenylene group, and a naphthylene group, each of which is substituted or unsubstituted;
L 2 is a bond or a group selected from a phenylene group, a biphenylene group, and a naphthylene group, each of which is substituted or unsubstituted;
R 1 to R 4 are each independently hydrogen, or any adjacent two of R 1 to R 4 joined to form a ring A, and the ring A is a benzene ring.
2 . The nitrogen-containing fused heterocyclic compound as claimed in claim 1 , wherein the nitrogen-containing fused heterocyclic compound is any one of the following compounds:
3 . An application of the nitrogen-containing fused heterocyclic compound as claimed in claim 1 in preparation of an optical element.
4 . The application as claimed in claim 3 , wherein the optical element comprises any one of an organic electroluminescence element, an organic field-effect transistor, an organic thin film transistor, an organic light-emitting transistor, an organic integrated circuit, an organic solar cell, an organic field quenching element, a light-emitting electrochemical cell, an organic laser diode, and an organic photoreceptor.
5 . An organic electroluminescence element, wherein the organic electroluminescence element comprises an anode, a cathode, and an organic layer disposed between the anode and the cathode, and the organic layer comprises one or more the nitrogen-containing fused heterocyclic compounds as claimed in claim 1 .
6 . The organic electroluminescence element as claimed in claim 5 , wherein the organic layer comprises a hole injection layer, a hole transport layer, an emitting layer, an electron transport layer and an electron injection layer, which are sequentially layered from a side of the anode to a side of the cathode.
7 . An organic electroluminescence device, wherein the organic electroluminescence device comprises the organic electroluminescence element as claimed in claim 5 .