Conductive polymer comprising 3,6-carbazole and organic solar cell using same

Abstract

The present invention relates a conductive polymer containing a 3,6-carbazole group represented by Chemical Formula 1 and an organic polymer thin film solar cell including the same.

1 . A copolymer comprising a 3,6-carbazole group represented by the following Chemical Formula 1: 
       
         
           
           
               
               
           
         
         wherein, Y is an electron acceptor; 
         X is an electron donor; 
         Y is represented by the following Chemical Formula: 
       
       
         
           
           
               
               
           
         
         X is represented by the following Chemical Formula: 
       
       
         
           
           
               
               
           
         
         R 1  to R 5  are independently hydrogen, C 1 -C 20  alkyl, C 1 -C 20  alkoxy, C 3 -C 20  cycloalkyl, C 1 -C 20  heterocycloalkyl, C 1 -C 20  aryl, C 1 -C 20  heteroaryl, CN, C(O)R or C(O)OR, and R is independently hydrogen, C 1 -C 20  alkyl, C 1 -C 20  heterocycloalkyl, aryl or heteroaryl; 
         for l and m, l+m=1 in a molar fraction and m has a range of 0.01≦m≦0.9; and 
         the molecular weight has a range of 5,000≦Mn≦100,000. 
       
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . The copolymer of  claim 1 , wherein m has a range of 0.01≦m≦0.7. 
     
     
         6 . The copolymer of  claim 1 , wherein m has a range of 0.01≦m≦0.1, and the copolymer is a conductive copolymer. 
     
     
         7 . 
     
     
         8 . An organic solar cell comprising a photoelectric conversion layer,
 wherein the photoelectric conversion layer comprise an electron acceptor; and a conductive polymer is a copolymer containing a 3,6-carbazole group represented by the following Chemical Formula 1:   
       
         
           
           
               
               
           
         
         wherein, Y is an electron acceptor; 
         X is an electron donor; 
         Y is represented by the following Chemical Formula: 
       
       
         
           
           
               
               
           
         
         X is represented by the following Chemical Formula: 
       
       
         
           
           
               
               
           
         
         R 1  to R 5  are independently hydrogen, C 1 -C 20  alkyl, C 1 -C 20  alkoxy, C 3 -C 20  cycloalkyl, C 1 -C 20  heterocycloalkyl, C 1 -C 20  aryl, C 1 -C 20  heteroaryl, CN, C(O)R or C(O)OR, and R is independently hydrogen, C 1 -C 20  alkyl, C 1 -C 20  heterocycloalkyl, aryl or heteroaryl; 
         for l and m, l+m=1 in a molar fraction and m has a range of 0.01≦m≦0.7; and 
         a degree of polymerization that ranges from 5 to 200. 
       
     
     
         9 . The organic solar cell of  claim 8 , wherein m has a range of 0.01≦m≦0.1. 
     
     
         10 . The organic solar cell of  claim 8 , wherein the electron acceptor is a C 60  fullerene derivative or a C 70  fullerene derivative. 
     
     
         11 . The organic solar cell of  claim 8 , comprising:
 a substrate;   a first electrode formed on the substrate,   a photoelectric conversion layer formed on the first electrode; and   a second electrode formed on the photoelectric conversion layer.   
     
     
         12 . The organic solar cell of  claim 8 , wherein m has a range of 0.01≦m≦0.1. 
     
     
         13 . A photoelectric conversion device, comprising a photoelectric conversion material,
 wherein the photoelectric conversion material includes the conductive copolymer of  claim 1 .   
     
     
         14 . The photoelectric conversion device of  claim 13 , which is an organic solar cell, a photovoltaic device, an organic light emitting diode or an organic thin film transistor.