Organic light-emitting device using a compound having a carrier transport property and a phosphorescent property
Disclosed is an organic light-emitting device which contains one or more organic layers sandwiched between an anode and a cathode, wherein at least one of the organic layers is a light-emitting layer including a polymer compound (I), the polymer compound (I) containing structural units derived from a hole transport or electron transport and phosphorescent polymerizable compound (a1) and structural units derived from a polymerizable compound (b) capable of transporting an oppositely charged carrier, the polymerizable compound (a1) being selected from formulae (E1-1) to (E1-39) as defined herein.
1. An organic light-emitting device which contains one or more organic layers sandwiched between an anode and a cathode, wherein at least one of the organic layers is a light-emitting layer comprising a polymer compound (I), the polymer compound (I) comprising structural units derived from a hole transport and phosphorescent polymerizable compound (a1) and structural units derived from an electron transport polymerizable compound (b), the polymerizable compound (a1) being selected from the group consisting of the following formulae (E1-1) to (E1-9) and (E1-13) to (E1-32), and wherein the light-emitting layer includes the polymerizable compound (a1) as the only hole transport compound and the light-emitting layer further comprises a phosphorescent compound (d) which emits light at lower energy than the polymerizable compound (a1):
wherein at least one of the hydrogen atoms in the formula (E1-1) is replaced by a substituent selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an amino group optionally substituted with an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and a silyl group, and one of the hydrogen atoms is replaced by a polymerizable substituent represented by general formula (H1),
wherein R 25 represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms; and these substitutions apply to the hydrogen atoms in the formulae (E1-2) to (E1-9) and (E1-13) to (E1-32).
2. The organic light-emitting device according to claim 1 , wherein the polymerizable compound (a1) is represented by the formula (E1-1).
3. An organic light-emitting device which contains one or more organic layers sandwiched between an anode and a cathode, wherein at least one layer of the organic layers is a light-emitting layer comprising a compound (a2) being a hole transport and phosphorescent compound and a polymer compound (II) comprising structural units derived from an electron transport polymerizable compound (b), the compound (a2) being selected from the group consisting of the following formulae (E2-1) to (E2-9) and (E2-13) to (E2-32), and wherein the light-emitting layer includes the compound (a2) as the only hole transport compound and the light-emitting layer further comprises a phosphorescent compound (d) which emits light at lower energy than the compound (a2):
wherein at least one of the hydrogen atoms in the formula (E2-1) is replaced by a substituent selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an amino group optionally substituted with an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and a silyl group; and these substitutions apply to the hydrogen atoms in the formulae (E2-2) to (E2-9) and (E2-13) to (E2-32).
4. The organic light-emitting device according to claim 3 , wherein the compound (a2) is represented by the formula (E2-1).
5. The organic light-emitting device according to claim 1 , wherein the polymer compound (I) contains the structural units derived from the polymerizable compound (a1) in an amount of 15 to 30 wt % based on the total structural units.
6. The organic light-emitting device according to claim 3 , wherein the light-emitting layer contains the compound (a2) in an amount of 15 to 30 wt % based on the total amount of the compound (a2) and the polymer compound (II).
7. An image display device, wherein the organic light-emitting device as described in claim 1 is used.
8. An surface-emitting light source, wherein the organic light-emitting device as described in claim 1 is used.
9. A back-light for an image display device, wherein the organic light-emitting device as described in claim 1 is used.
10. An illuminating device, wherein the organic light-emitting device as described in claim 1 is used.
11. An interior, wherein the organic light-emitting device as described in claim 1 is used.
12. An exterior, wherein the organic light-emitting device as described in claim 1 is used.
13. An image display device, wherein the organic light-emitting device as described in claim 3 is used.
14. An surface-emitting light source, wherein the organic light-emitting device as described in claim 3 is used.
15. A back-light for an image display device, wherein the organic light-emitting device as described in claim 3 is used.
16. An illuminating device, wherein the organic light-emitting device as described in claim 3 is used.
17. An interior, wherein the organic light-emitting device as described in claim 3 is used.
18. An exterior, wherein the organic light-emitting device as described in claim 3 is used.