Organic electric-field light-emitting element

Abstract

In an organic electroluminescent element comprising an anode layer, an organic luminescent layer, an inorganic compound layer (or reductive dopant layer) and a cathode layer; the organic luminescent layer comprises an aromatic amine compound of a formula (1), and/or an aromatic amine compound of a formula (2) wherein A, B, and Ar 1 to Ar 6 are independently a C 6-60 aromatic group which does not contain a styryl group nor an alkenyl group, at least one of A, Ar 1 , Ar 2 , or B, Ar 3 to Ar 6 contains at least three condensed aromatic rings, and p, q and r of a condensation number are an integer of 1 to 6. The element has significantly long half-life and high luminance even at low driving voltages.

1 . An organic electroluminescent element comprising an anode layer, an organic luminescent layer, a cathode layer and an inorganic compound layer between the organic luminescent layer and the cathode layer; 
 the inorganic compound layer comprising at least one metallic compound selected from the group consisting of chalcogenides of alkali metals, chalcogenides of alkaline-earth metals, LiCl, LiBr, LiI, NaF, NaCl, NaBr, Nal, KF, KCl, KBr, KI, RbF, Rbcl, RbBr, RbI, CsF, CsCl, CsBr, CsI, halides of alkaline-earth metals; or an oxide, nitride, or oxidized nitride containing at least one element selected from the group consisting of Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, Cd, Mg, Si, Ta, Sb, and Zn;    the organic luminescent layer comprising either or both of an aromatic amine compound represented by a formula (1), and an aromatic amine compound represented by a formula (2)                          wherein A, Ar 1  and Ar 2  are independently a substituted or unsubstituted C 6-60  aromatic group that does not contain a styryl group nor an alkenyl group, at least one of A, Ar 1  and Ar 2  contains substituted or unsubstituted at least three condensed aromatic rings, and p of a condensation number is an integer of 1 to 6,                          wherein B, Ar 3 , Ar 4 , Ar 5  and Ar 6  are independently a substituted or unsubstituted C 6-60  aromatic group that does not contain a styryl group nor an alkenyl group, at least one of B, Ar 3 , Ar 4 , Ar 5  and Ar 6  contains substituted or unsubstituted at least three condensed aromatic rings, and q and r of a condensation number are an integer of 1 to 6.    
   
   
       2 .- 8 . (canceled)  
   
   
       9 . The organic electroluminescent element according to  claim 1  wherein the aromatic amine compounds of the formulas (1) and (2) contain condensed aromatic rings having a bone structure of pyrene, perylene, anthracene, fluoranthene, chrycene, rubicene, tetracene, pentacene, tetrabenzophenanthrene, tetrabenzanthracene, tetrabenzofluorene, benzoperylene, dibenzopyrene, dibenzochrycene, dibenzoperylene, benzotetracene, decacyclene, acenaphthofluoranthene or dibenzofluoranthene.  
   
   
       10 . The organic electroluminescent element according to  claim 1  wherein in the formulas (1) and (2), Ar 1  to Ar 6  have 6 to 40 carbon atoms; and A and B contain substituted or unsubstituted at least three condensed aromatic rings.  
   
   
       11 . The organic electroluminescent element according to  claim 1  wherein in the formulas (1) and (2), Ar 1  to Ar 12  contain a cyano group, a halogen group, a linear, branched or cyclic alkyl group, a linear, branched or cyclic alkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group, COOR wherein R represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, or a substituted or unsubstituted arylthio group.  
   
   
       12 . An organic electroluminescent element comprising an anode layer, an organic luminescent layer, a cathode layer and an inorganic compound layer between the organic luminescent layer and the cathode layer; 
 the organic luminescent layer comprising a compound selected from the group consisting of                                                              
   
   
       13 . The organic electroluminescent element according to  claim 1  wherein the inorganic compound layer comprises at least one metallic compound selected from the group consisting of chalcogenides of alkali metals, chalcogenides of alkaline-earth metals, halides of alkaline-earth metals; or an oxide, nitride, or oxidized nitride containing at least one element selected from the group consisting of Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, Cd, Mg, Si, Ta, Sb, and Zn.  
   
   
       14 . The organic electroluminescent element according to  claim 1  wherein the inorganic compound layer comprises at least one metallic compound selected from the group consisting of chalcogenides of alkali metals, chalcogenides of alkaline-earth metals, LiCl, KCl, NaF, NaCl, KF, halides of alkaline-earth metals; or an oxide, nitride, or oxidized nitride containing at least one element selected from the group consisting of Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, Cd, Mg, Si, Ta, Sb, and Zn.