Material for organic electroluminescence device and organic electroluminescence device

1. A material in a solid state, said material being for an organic electroluminescence device, comprising:

an organometallic compound that is to be provided for a dry film formation process of any of at least one organic layer included in the electroluminescence device, wherein the material has a water content before the dry film formation process, as measured by the Karl Fischer method, of 100 ppm or more and not more than 1,000 ppm,

wherein the organometallic compound is an iridium complex represented by the following formula (E-1):

in the formula (E-1), each of Z 1 and Z 2 independently represents a carbon atom;

A represents an atomic group for forming a 6-membered aromatic ring together with Z 1 and N;

B represents an atomic group for forming a 6-membered aromatic ring together with Z 2 and C;

though each of a line connecting Z 1 and N, a line connecting Z 1 and the atomic group A, a line connecting N and the atomic group A, a line connecting Z 2 and C, a line connecting Z 2 and the atomic group B and a line connecting C and the atomic group B is expressed by a single line, each may be either a single bond or a double bond irrespective of a bonding species; and

n represents an integer of 3.

2. The material according to claim 1 ,

wherein the iridium complex represented by the formula (E-1) is represented by the following formula (E-2):

in the formula (E-2), each of A 1 to A 8 independently represents a nitrogen atom or C—R;

R represents a hydrogen atom, an alkyl group, an aryl group, an aromatic heterocyclic group, a cyano group, a silyl group, an amino group or a fluorine atom; and

n represents an integer of 3.

3. The material according to claim 1 ,

wherein the iridium complex is represented by the following formula (PQ-1):

in the formula (PQ-1), each of R 1 to R 10 independently represents a hydrogen atom, an alkyl group, an aryl group, an aromatic heterocyclic group, a cyano group, a silyl group, an amino group or a fluorine atom;

R 1 to R 10 may be bonded to each other to form a ring, if possible; and

n represents an integer of 3.

4. A composition in a solid state that is to be provided for a dry film formation process of any of at least one organic layer included in an electroluminescence device, comprising:

the material of claim 1 and a compound represented by the following formula (4-1) or (4-2):

in the formulae (4-1) and (4-2), each of d and e independently represents an integer of from 0 to 3, and at least one of d and e is 1 or more;

f represents an integer of from 1 to 4;

R′ 8 represents an alkyl group, an aryl group, a heteroaryl group, a fluorine atom, a cyano group, an alkoxy group, an aryloxy group, an amino group or a silyl group, and when plural R′ 8 s are present, each R′ 8 may be the same or different from every other R′ 8 ; and

at least one of R′ 8 s represents a group represented by the following formula (5):

in the formula (5), each of R′ 9 s independently represents an alkyl group, an aryl group, a heteroaryl group, a fluorine atom, a cyano group, an alkoxy group, an aryloxy group, an amino group or a silyl group; and

g represents an integer of from 0 to 8.

5. A method for manufacturing an organic electroluminescence device, comprising: forming a layer comprising the material for an organic electroluminescence device according to claim 1 .