Polymeric material and polymeric luminescent element

Abstract

A luminescent or charge-transporting polymer which has in the backbone optionally substituted fluorenediyl groups as repeating units and further has a functional side chain comprising at least one functional group selected from the group consisting of a hole-injection/transporting group containing one or more heteroatoms other than nitrogen or two or more nitrogen atoms, an electron-injection/transporting group containing one or more heteroatoms other than nitrogen or two or more nitrogen atoms, and a luminescent group comprising a fused aromatic hydrocarbon or heterocycle, characterized in that the functional group is directly bonded to the saturated carbon atom of any of the fluorenediyl groups or is bonded to any of the fluorenediyl groups through —R k —X— (R k represents alkylene and X represents a direct bond or connecting group) at the X.

1 . A solution characterized by comprising at least one kind of polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,
 characterized in that the functional group is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X.   
     
     
         2 . A solution characterized by comprising a composition comprising at least one kind of material selected from the group consisting of a hole transport material, an electron transport material and a light-emitting material, and at least one kind of polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,
 characterized in that the functional group is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X.   
     
     
         3 . The solution according to  claim 1 , characterized by comprising at least two kinds of organic solvents. 
     
     
         4 . The solution according to  claim 1 , wherein a viscosity thereof is 1 to 20 mPa·s at 25° C. 
     
     
         5 . A method of forming a thin film according to  claim 1  characterized by using an inkjet method. 
     
     
         6 . A polymer light-emitting device having an organic layer containing a polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,
 characterized in that the functional group is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X or a composition between electrodes consisting of an anode and a cathode, the composition characterized by comprising at least one kind of material selected from the group consisting of a hole transport material, an electron transport material and a light-emitting material, and at least one kind of polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,   characterized in that the functional group of the composition is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X.   
     
     
         7 . The polymer light-emitting device according to  claim 6 , wherein the organic layer is a light-emitting layer. 
     
     
         8 . The polymer light-emitting device according to  claim 7 , wherein the light-emitting layer further contains a hole transport material, an electron transport material or a light-emitting material. 
     
     
         9 . The polymer light-emitting device according to  claim 6 , comprising a light-emitting layer and a charge transport layer between electrodes consisting of an anode and a cathode, wherein the charge transport layer contains a polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,
 characterized in that the functional group is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X or a composition characterized by comprising at least one kind of material selected from the group consisting of a hole transport material, an electron transport material and a light-emitting material, and at least one kind of polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,   characterized in that the functional group of the composition is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X.   
     
     
         10 . The polymer light-emitting device according to  claim 6 , comprising a light-emitting layer and a charge transport layer between electrodes consisting of an anode and a cathode, and a charge injection layer between the charge transport layer and the electrodes, wherein the charge injection layer contains a polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,
 characterized in that the functional group is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X or a composition characterized by comprising at least one kind of material selected from the group consisting of a hole transport material, an electron transport material and a light-emitting material, and at least one kind of polymer compound having a fluorenediyl group that may have a substituent as a repeat unit in a main chain and a functional side chain containing at least one functional group selected from the group consisting of a hole injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, an electron injection/transport group containing at least one hetero atom other than a nitrogen atom or at least two nitrogen atoms, and a light emitting group containing a condensed polycyclic aromatic hydrocarbon or a heterocyclic ring,   characterized in that the functional group of the composition is directly bonded to a saturated carbon of the fluorenediyl group or bonded to the fluorenediyl group via —R k —X— (R k  represents an alkylene group and X represents a direct bond or bonding group) at X.   
     
     
         11 . A planar light source characterized by comprising a polymer light-emitting device according to  claim 6 . 
     
     
         12 . A segment display device characterized by comprising a polymer light-emitting device according to  claim 6 . 
     
     
         13 . A dot matrix display device characterized by comprising a polymer light-emitting device according to  claim 6 . 
     
     
         14 . A liquid crystal display device characterized by comprising a polymer light-emitting device according to  claim 6  as a backlight.