Light-emitting device material and light-emitting device

Abstract

A light emitting device material containing a pyrene compound of general formula (1) and a light emitting device. In formula (1), R 1 to R 18 are the same or different and are selected from hydrogen, alkyl, cycloalkyl, heterocyclic, alkenyl, cycloalkenyl, alkynyl, alkoxy, alkylthio, arylether, arylthioether, aryl, heteroaryl, halogen, carbonyl, a carboxyl, oxycarbonyl, carbamoyl, amino, phosphine oxide and silyl; adjacent substituents among R 1 to R 18 may be combined with each other to form a ring; n is an integer of 1 to 3; X is —O—, —S— or —NR 19 —; R 19 is hydrogen, alkyl, cycloalkyl, heterocyclic, alkenyl, cycloalkenyl, alkynyl, aryl, heteroaryl or amino; R 19 may be combined with R 11 or R 18 to form a ring; Y is a single bond, arylene or heteroarylene; and n substituents among R 1 to R 10 and any one of R 11 to R 19 are used for linkage with Y

1 . A light emitting device material containing a pyrene compound represented by the formula (1): 
       
         
           
           
               
               
           
         
       
       wherein R 1  to R 18  may be the same or different and represent a group selected from hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an alkoxy group, an alkylthio group, an arylether group, an arylthioether group, an aryl group, a heteroaryl group, a halogen, a carbonyl group, a carboxyl group, an oxycarbonyl group, a carbamoyl group, an amino group, a phosphine oxide group and a silyl group; adjacent substituents among R 1  to R 18  may be combined with each other to form a ring; n represents an integer of 1 to 3; X represents a group selected from —O— and —S—; Y represents a single bond, an arylene group or a heteroarylene group; and n substituents among R 1  to R 10  and any one of R 11  to R 19  are used for linkage with Y. 
     
     
         2 . The light emitting device material according to  claim 1 , wherein at least one of R 3 , R 6  and R 8  is a group which is different from R 1 . 
     
     
         3 . The light emitting device material according to  claim 1 , wherein R 1  is an aryl group or a heteroaryl group, and at least one Y is linked at the position of R 6  or R 8 . 
     
     
         4 . The light emitting device material according to  claim 1 , wherein R 2  is an alkyl group or a cycloalkyl group, and at least one Y is linked at the position of R 6  or R 8 . 
     
     
         5 . The light emitting device material according to  claim 1 , wherein at least one of R 11  to R 18  in the formula (1) is a group selected from an alkyl group, a cycloalkyl group, an aryl group and a heteroaryl group, or at least two adjacent substituents among R 11  to R 18  are combined to form a ring. 
     
     
         6 . A light emitting device comprising an anode, a cathode and an organic layer existing between the anode and the cathode, the organic layer containing at least an emissive layer, the emissive layer emitting light by electric energy, wherein the organic layer contains a light emitting device material as claimed in  claim 1 . 
     
     
         7 . The light emitting device according to  claim 6 , wherein the emissive layer contains a host material and a dopant material and the host material is a pyrene compound represented by the formula (1). 
     
     
         8 . The light emitting device according to  claim 6 , wherein an electron transporting layer further exists between the emissive layer and the cathode and the electron transporting layer contains a compound which contains an electron-accepting nitrogen, and also has a heteroaryl ring structure composed of an element selected from carbon, hydrogen, nitrogen, oxygen, silicon and phosphorus. 
     
     
         9 . A light emitting device material containing a pyrene compound represented by the following formula: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         10 . A light emitting device comprising an anode, a cathode and an organic layer existing between the anode and the cathode, the organic layer containing at least an emissive layer, the emissive layer emitting light by electric energy, wherein the organic layer contains a light emitting device material as claimed in  claim 9 .