Organic electroluminescent element using pyrene derivative
An organic electroluminescence device includes a pair of electrodes and an organic compound layer therebetween. The organic compound layer includes an emitting layer. The emitting layer includes a pyrene derivative represented by formula (1), such that a content of the pyrene derivative in the emitting layer is 50 to 100 wt %. Ar 1 and Ar 2 are independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms. X 1 and X 3 to X 8 are a hydrogen atom. X 2 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, provided that Ar 1 or Ar 2 is different from X 2 . In a case where any of Ar 1 , Ar 2 , and X 2 is the aryl group having a substituent, the substituent is independently an alkyl group, a cycloalkyl group, an aryl group, a silyl group, or a cyano group.
1. An organic electroluminescence device, comprising a pair of electrodes and an organic compound layer therebetween, said organic compound layer comprising an emitting layer,
wherein:
the emitting layer comprises a pyrene derivative represented by formula (1), such that a content of the pyrene derivative in the emitting layer is 50 to 100 wt %:
Ar 1 and Ar 2 are independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms;
X 1 and X 3 to X 8 are a hydrogen atom;
X 2 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, provided that Ar 1 or Ar 2 is different from X 2 ; and
in a case where any of Ar 1 , Ar 2 , and X 2 is the aryl group having a substituent, the substituent is independently an alkyl group, a cycloalkyl group, an aryl group, a silyl group, or a cyano group.
2. The organic electroluminescence device of claim 1 , wherein Ar 1 and Ar 2 are independently a substituted or unsubstituted phenyl group.
3. The organic electroluminescence device of claim 2 , wherein the substituted phenyl group is represented by formula (2):
wherein:
R 1 to R 5 are independently a hydrogen atom or a substituent; and
at least one of R 1 to R 5 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms.
4. The organic electroluminescence device of claim 3 , wherein the substituent represented by formula (2) is a substituted or unsubstituted 2-biphenyl group.
5. The organic electroluminescence device of claim 1 , wherein Ar 1 and Ar 2 are independently a substituted or unsubstituted 1-naphthyl group.
6. The organic electroluminescence device of claim 1 , wherein Ar 1 and Ar 2 are independently a substituted or unsubstituted phenanthryl group.
7. The organic electroluminescence device of claim 1 , wherein the emitting layer further comprises a dopant.
8. The organic electroluminescence device of claim 7 , wherein the dopant is an aromatic hydrocarbon derivative.
9. The organic electroluminescence device of claim 7 , wherein the dopant is an amine compound.
10. The organic electroluminescence device of claim 1 , wherein X 2 is a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group or a substituted or unsubstituted fluorenyl group.
11. The organic electroluminescence device of claim 1 , wherein Ar 1 and Ar 2 are independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group or a substituted or unsubstituted biphenyl group.