Organic electroluminescence device

1. A light emitting organic thin film comprising at least one compound represented by Formula (PQ-1) and at least one compound represented by Formula (Ch-1):

wherein each of R a , R b and R c independently represents a hydrogen atom or an alkyl group, any one of R a , R b and R c represents a hydrogen atom, and the remaining two represent an alkyl group,

each of R 1 to R 5 independently represents a hydrogen atom, an alkyl group, an aryl group, a fluorine atom or a cyano group,

each of R x and R y independently represents an alkyl group or a phenyl group,

each of R 101 to R 110 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group,

each of R 111 to R 115 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, provided that any one of R 111 to R 115 represents a condensed hydrocarbyl group that may have a substituent Z,

each of R 121 to R 125 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, provided that any one of R 121 to R 125 represents a condensed hydrocarbyl group that may have a substituent Z, and

the substituent Z represents an alkyl group, an alkenyl group, a phenyl group, an aromatic heterocyclic group, an alkoxy group, a phenoxy group, a fluorine atom, a silyl group, an amino group, a cyano group or a combination thereof, and a plurality of substituents Z may be bonded to each other to form an aryl ring.

2. The light emitting organic thin film according to claim 1 ,

wherein the compound represented by Formula (Ch-1) has no peak current value at 100K to 150K as determined by thermally stimulated current of a thin film formed to a film thickness of 100 nm by vacuum deposition of the compound.

3. The light emitting organic thin film according to claim 1 ,

wherein two of R a , R b and R c represent a methyl group and the remaining one represents a hydrogen atom.

4. The light emitting organic thin film according to claim 3 ,

wherein R 1 to R 5 represent a hydrogen atom.

5. The light emitting organic thin film according to claim 1 ,

wherein R a and R c represent an alkyl group, and R b represents a hydrogen group.

6. The light emitting organic thin film according to claim 1 ,

wherein R 101 to R 110 represent a hydrogen atom.

7. The light emitting organic thin film according to claim 1 ,

wherein any one of R 111 to R 115 represents a naphthyl or a phenanthryl group and the others represent a hydrogen atom, and

any one of R 121 to R 125 represents a naphthyl or a phenanthryl group and the others represent a hydrogen atom.

8. The light emitting organic thin film according to claim 1 ,

wherein R a and R c represent an alkyl group and R b represents a hydrogen group, and

any one of R 111 to R 115 represents a naphthyl or a phenanthryl group and the others represent a hydrogen atom, and

any one of R 121 to R 125 represents a naphthyl or a phenanthryl group and the others represent a hydrogen atom.

9. The light emitting organic thin film according to claim 1 ,

wherein a content of Cl, Br and I contained in the light emitting organic thin film is 100 ppm or less.

10. A composition comprising a compound represented by Formula (PQ-1) and a compound represented by Formula (Ch-1):

wherein each of R a , R b and R c independently represents a hydrogen atom or an alkyl group, any one of R a , R b and R c represents a hydrogen atom, and the remaining two represent an alkyl group,

each of R 1 to R 5 independently represents a hydrogen atom, an alkyl group, an aryl group, a fluorine atom or a cyano group,

each of R x and R y independently represents an alkyl group or a phenyl group,

each of R 101 to R 110 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group,

each of R 111 to R 115 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, provided that any one of R 111 to R 115 represents a condensed hydrocarbyl group that may have a substituent Z,

each of R 121 to R 125 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, provided that any one of R 121 to R 125 represents a condensed hydrocarbyl group that may have a substituent Z, and

the substituent Z represents an alkyl group, an alkenyl group, a phenyl group, an aromatic heterocyclic group, an alkoxy group, a phenoxy group, a fluorine atom, a silyl group, an amino group, a cyano group or a combination thereof, and a plurality of substituents Z may be bonded to each other to form an aryl ring.

11. An organic electroluminescence device comprising:

a pair of electrodes; and

an organic layer including a light emitting layer disposed between the electrodes, on a substrate,

wherein the light emitting layer is the light emitting organic thin film according to claim 1 .

12. The organic electroluminescence device according to claim 11 ,

wherein at least one layer of the organic layer is formed by a coating process using a solution or dispersion.

13. A display apparatus using the organic electroluminescence device according to claim 11 .

14. An illumination apparatus using the organic electroluminescence device according to claim 11 .

15. An organic electroluminescence device comprising:

a pair of electrodes; and

an organic layer including a light emitting layer disposed between the electrodes, on a substrate,

wherein the light emitting layer is the light emitting organic thin film according to claim 1 , and

the compound represented by Formula (Ch-1) of claim 1 has no peak current value at 100K to 150K as determined by thermally stimulated current of a thin film formed to a film thickness of 100 nm by vacuum deposition of the compound.