Polymer compound and light emitting device using the same

1. A polymer compound comprising a repeating unit of the following formula (1) and having a polystyrene-reduced number average molecular weight of 1×10 3 to 1×10 8 :

wherein, Ar 1 and Ar 2 represent each independently an optionally substituted arylene group, optionally divalent heterocyclic group or optionally substituted divalent aromatic amine group; when a plurality of Ar 1 s and Ar 2 s are present, these may be the same or different; Z 1 represents —CR 1 ═CR 2 — or —C═C—; here, R 1 and R 2 represent each independently a hydrogen atom, alkyl group, aryl group, monovalent heterocyclic group or cyano group; m and n represent each independently 1 or 2; and R s and R t represent each independently a hydrogen atom, alkyl group or alkoxy group.

2. The polymer compound according to claim 1 , wherein the repeating unit of the formula (1) is a unit of the following formula (1a):

wherein, R a , R b , R c and R d represent each independently a hydrogen atom, alkyl group, alkoxy group or aryl group; R c and R f represent each independently a hydrogen atom, alkyl group or aryl group; m′ and n′ represent each independently 1 or 2, and when a plurality of R a s to R d s are present, these may be the same or different.

3. The polymer compound according to claim 1 , further comprising a repeating unit of the following formula (2):

—Ar 5 —Z 2 —  (2)

wherein, Ar 5 represents an optionally substituted arylene group, optionally substituted divalent heterocyclic group or optionally substituted divalent aromatic amine group; Z 2 represents —CR 3 ═CR 4 — or —C═C—; and R 3 and R 4 represent each independently a hydrogen atom, alkyl group, aryl group, monovalent heterocyclic group or cyano group.

4. The polymer compound according to claim 3 , wherein in said formula (2), the optionally substituted arylene group represented by Ar 5 is a group of the following formula (60):

wherein, A ring and B ring represent each independently an optionally substituted aromatic hydrocarbon ring; two connecting bonds are present respectively on the A ring or the B ring; and Rw and Rx represent each independently a hydrogen atom, alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylalkyl group, arylalkoxy group, arylalkynyl group, arylalkynyl group, arylamino group, monovalent heterocyclic group, acyl group, substituted carboxyl group or cyano group, and Rw and Rx may be mutually connected to form a ring.

5. The polymer compound according to claim 4 , wherein said optionally substituted arylene group of the formula (60) is a group of any of the following formulae (2A) to (2D):

wherein, R g represents a hydrogen atom, alkyl group or aryl group; two R g s may be the same or different; and two R g s may be mutually connected to form a ring.

6. The polymer compound according to claim 3 , wherein in said formula (2), the optionally substituted divalent heterocyclic group represented by Ar 5 is a group of the following formula (70):

wherein, C ring and D ring represent each independently an aromatic ring; the C ring and D ring optionally have a substituent selected from the group consisting of alkyl groups, alkoxy groups, alkylthio groups, alkylsilyl groups, alkylamino groups, aryl groups, aryloxy groups, arylalkyl groups, arylalkoxy groups, arylalkynyl groups, arylalkynyl groups, arylamino groups, monovalent heterocyclic groups, acyl groups, acyloxy groups, substituted carboxyl groups and cyano group; when a plurality of substituents are present, they may be the same or different; and E represents O or S.

7. The polymer compound according to claim 6 , wherein said optionally substituted divalent heterocyclic group of the formula (70) is a group of the following formula (2E):

wherein, Y represents O or S; R j and R k represent each independently an alkyl group, alkoxy group or aryl group; and a and b represent each independently 0 or 1.

8. The polymer compound according to claim 3 , wherein said group represented by Z 2 is —CR 3 ═CR 4 —.

9. A composition comprising the polymer compound as described in claim 1 , and a compound having a polystyrene-reduced number average molecular weight of 10 3 to 10 8 other than the polymer compound.

10. A polymer light emitting device having electrodes composed of an anode and a cathode, and a light emitting layer containing the polymer compound as described in claim 1 provided between the electrodes.

11. A sheet light source comprising the polymer light emitting device as described in claim 10 .

12. A display comprising the polymer light emitting device as described in claim 10 .

13. A liquid composition comprising the polymer compound as described in claim 1 , and a solvent.

14. A thin film comprising the polymer compound as described in claim 1 .

15. An organic transistor comprising the polymer compound as described in claim 1 .

16. A solar battery comprising the polymer compound as described in claim 1 .