Polymer compound and polymer light-emitting device using the same

Abstract

A polymer compound comprising a repeating unit of below formula (1) or (2), and having a polystyrene reduced number average molecular weight of 10 3 to 10 8 , (wherein, Ar 1 and Ar 2 each independently represent a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group. X 1 and X 2 each independently represent O, S, C(═O), S(═O), SO 2 , C(R 1 )(R 2 ), Si(R 3 )(R 4 ), N(R 5 ), B(R 6 ), P(R 7 ) or P(═O)(R 8 ). X 1 and X 2 are not the same. X 1 and Ar 2 bond to adjacent carbons in the aromatic ring of Ar 1 , and X 2 and Ar 1 bond to adjacent carbons in the aromatic ring of Ar 2 ), (wherein, Ar 3 and Ar 4 each independently represent a trivalent aromatic hydrocarbon group or a trivalent heterocyclic group. X 3 and X 4 each independently represent N, B, P, C(R 9 ) or Si(R 10 ). X 3 and X 4 are not the same. X 3 and Ar 4 bond to adjacent carbons in the aromatic ring of Ar 3 , and X 4 and Ar 3 bond to adjacent carbons in the aromatic ring of Ar 4 .).

1 . A polymer comprising a repeating unit of below formula (2), and having a polystyrene reduced number average molecular weight of 10 3  to 10 8 , 
       
         
           
           
               
               
           
         
       
       wherein, Ar 3  and Ar 4  each independently represent a trivalent aromatic hydrocarbon group or a trivalent aromatic heterocyclic group, X 3  and X 4  each independently represent N, B, P, C(R 9 ) or Si(R 10 ), and wherein R 8  and R 10  each independently represent a hydrogen atom, halogen atom, alkyl group, alkyloxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkyloxy group, arylalkylthio group, acyl group, acyloxy group, amide group, acid imide group, imine residue, amino group, substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, a monovalent heterocyclic group, arylalkenyl group, arylethynyl group, carboxyl group or cyano group, X 3  and X 4  are not the same, X 3  and Ar 4  bond to adjacent carbons in the aromatic ring of Ar 3 , and X 4  and Ar 3  bond to adjacent carbons in the aromatic ring of Ar 4 ,
 and further comprising the repeating unit represented by the below formula (5),
   Ar 5   (5)
 
 
 wherein Ar 5  represents a divalent heterocyclic group. 
 
     
     
         2 . A polymer compound according to  claim 1 , wherein the repeating unit represented by the above formula (1) or (2) is included, and further the repeating unit represented by the below formula (15) is included, 
       
         
           
           
               
               
           
         
       
       wherein Ar 11 , Ar 12 , Ar 13 , and Ar 14  each independently represent an arylene group or a divalent heterocyclic group Ar 15 , Ar 16 , and Ar 17  each independently represent an aryl group or a monovalent heterocyclic group, o and p each independently represent 0 or l, and 0≦o+p≦1. 
     
     
         3 . A polymer compound according to  claim 1 , wherein the total of the repeating unit represented by formula (1) and (2) is 10% by mole or more based on whole repeating units. 
     
     
         4 . A polymer compound according to  claim 1 , having liquid-crystal property. 
     
     
         5 . A polymer compound according to  claim 1 , having fluorescence in the solid state. 
     
     
         6 . A composition comprising a polymer compound according to  claim 1 , and at least one kind of material selected from a hole transporting material, an electron transporting material and a light-emitting material. 
     
     
         7 . An ink composition comprising a polymer compound according to  claim 1 . 
     
     
         8 . A light emitting thin film, a conductive thin film, or an organic semiconductor thin film, comprising a polymer compound according to  claim 1 . 
     
     
         9 . A polymer light-emitting device having an organic layer between electrodes consisting of an anode and a cathode, and the organic layer containing a polymer compound according to  claim 1 . 
     
     
         10 . A polymer light-emitting device according to  claim 9 , wherein the organic layer is a light emitting layer. 
     
     
         11 . A polymer light-emitting device according to  claim 10 , wherein a light emitting layer contains further a hole transporting material, an electron transporting material, or a light-emitting material. 
     
     
         12 . A flat light source, segment display material, or dot matrix display apparatus, comprising a polymer light-emitting device according to  claim 9 , as a back light. 
     
     
         13 . A liquid crystal display, comprising a polymer light-emitting device according to  claim 9 .