Light emitting device

1. An organic electroluminescent device comprising:

a pair of electrodes;

an organic compound layer between the pair of electrodes, the organic compound layer comprising in order: a hole transport layer; a light emitting layer; and an electron transport layer,

wherein the hole transport layer comprises:

a hole transport material; and

an electrically inactive organic compound capable of being subjected to dry film formation, the electrically inactive organic compound having an energy difference Eg between a highest occupied molecular orbital and a lowest unoccupied molecular orbital of 4.0 eV or more;

wherein the electrically inactive organic compound is a compound represented by formula (1):

L—(Ar) m   Formula (1)

wherein Ar represents a group represented by formula (2); L represents a trivalent or tetravalent benzene skeleton; and m represents an integer of 3 or 4:

wherein R 1 represents a substituent; n 1 represents an integer of 0 to 2, when plural R 1 s are present, the plural R 1 s are the same or different; R 3 represents a substituent; n 3 represents an integer of 0 to 1 and when plural R 3 s are present, the plural R 3 s are the same or different.

2. The organic electroluminescent device of claim 1 , wherein the light emitting layer comprises a phosphorescent material.

3. The organic electroluminescent device of claim 2 , wherein the phosphorescent material is an orthometalated metal complex or a porphyrin metal complex.

4. The organic electroluminescent device of claim 1 , wherein the electrically inactive organic compound has a triplet excited state having a lowest energy level T 1 of 2.7 eV or more.

5. The organic electroluminescent device of claim 1 , wherein the electrically inactive organic compound has an electron affinity of not more than 2.3 eV.

6. The organic electroluminescent device of claim 1 , wherein the electrically inactive organic compound is an aromatic hydrocarbon compound.

7. The organic electroluminescent device of claim 1 , wherein the electrically inactive organic compound has a molecular weight of from 300 to 2,000.

8. The organic electroluminescent device of claim 1 , wherein the hole transport layer comprises: a first hole transport layer comprising a first hole transport material; and a second hole transport layer comprising a second hole transport material and the electrically inactive organic compound.

9. The organic electroluminescent device of claim 1 , wherein R 1 and R 3 each independenify represent a substituent selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an amino group, an alkoxy group, an aryloxy group, a heteroaryloxy group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, aryloxycarbonylamino group, a sulfonylamino group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, a heteroarylthio group, a sulfonyl group, a sulfinyl group, an ureido group, a phosphoric amido group, a hydroxyl group, a mercapto group, a halogen atom, a cyano group, a sulfo group, a carboxyl group, a nitro group, a hydroxamic group, a sulfino group, a hydrazino group, an imino group, a heterocyclic group and a silyl group.