Polymer compound and organic electroluminescence element using the same
The present invention provides a polymer material capable of preparing organic EL elements having low driving voltage and high durability. The polymer compound of the present invention includes a constituting unit derived from a monomer represented by the formula (1); (in the formula (1), each of A 1 's is independently a condensed polycyclic aromatic group optionally having a heteroatom as a ring-constituting atom; the condensed polycyclic aromatic group links to A 2 at the meta position to the bonding position of the ring represented by the following formula; each of A 2 's is independently a six-membered ring aromatic group optionally having a heteroatom as a ring-constituting atom; at least one of A 1 and A 2 has a substituent having a polymerizable functional group; at least one of X's is a nitrogen atom, and n's are independently 1 or 2).
1. A polymer compound comprising a constituting unit derived from a monomer represented by the following formula (1):
wherein in the formula (1), one of A 1 s is a carbazolyl group, and the rest of the A 1 s are hydrogen atoms, the A 2 s to which the carbazolyl group is bonded is a m-phenylene group, and the rest of the A 2 s are the following group:
and the three Xs are all nitrogen atoms; and
two n's are independently 1 or 24.
2. The polymer compound according to claim 1 wherein the monomer represented by the formula (1) is represented by the following formula (1-i);
wherein in the formula (1-i), one of A 1 s is a carbazolyl group, and the rest of the A 1 s are hydrogen atoms, the A 2 s to which the carbazolyl group is bonded is a m-phenylene group, and the rest of the A 2 s are the following group:
and the three Xs are all nitrogen atoms.
3. The polymer compound according to claim 1 , which further comprises a constituting unit derived from a polymerizable compound having hole-transporting properties.
4. The polymer compound according to claim 3 , wherein the polymerizable compound having hole-transporting properties has a carbazole structure or a triphenylamine structure.
5. The polymer compound according to claim 4 , wherein the polymerizable compound having hole-transporting properties has a carbazole structure.
6. The polymer compound according to claim 1 , which further comprises at least one of a constituting unit derived from a polymerizable compound having electron-transporting properties and a constituting unit derived from a polymerizable compound having luminous properties.
7. The polymer compound according to claim 6 , wherein the polymerizable compound having luminous properties has phosphorescent properties.
8. The polymer compound according to claim 6 , wherein the polymerizable compound having luminous properties is a transition metal complex.
9. The polymer compound according to claim 8 , wherein the transition metal complex is an iridium complex.
10. The polymer compound according to claim 6 , wherein the polymerizable compound having electron-transporting properties has an aromatic heterocyclic substituent or a triarylboron substituent.
11. The polymer compound according to claim 1 , which is used for organic electroluminescence elements.
12. A luminous layer for organic electroluminescence elements comprising the polymer compound according to claim 1 .
13. An organic electroluminescence element comprising at least one organic layer provided between an anode and a cathode, wherein at least one luminous layer, which is contained in the organic layer, comprises the polymer compound according to claim 1 .
14. An article comprising the organic electroluminescence element according to claim 13 , which is selected from displays, back lights, electro-photographs, light sources for illumination, light sources for recording, light sources for exposure, light sources for reading, markers, signboards, interior goods and optical communication systems.
15. A process for producing an organic electroluminescence element, which process comprises a step of forming an organic layer comprising at least one luminous layer according to claim 12 on an anode, and a step of forming a cathode on the organic layer.