ORGANIC ELECTROLUMINESCENT ELEMENT AND ORGANIC-ELECTROLUMINESCENT-ELEMENT MATERIAL THAT HAS A DIBENZOTHIOPHENE OR DIBENZOFURAN STRUCTURE

摘要

An organic electroluminescent device excellent in heat resistance and durability. 1. An organic electroluminescent device comprising a substrate, a pair of electrodes made of an anode and a cathode, and at least one organic layer including a light emitting layer between the electrodes, wherein the light emitting layer contains at least one phosphorescent material, An organic electroluminescent device comprising a compound represented by the following general formula (1) in at least one layer of a single-layer organic layer. (In the general formula (1), X represents an oxygen atom or a sulfur atom, R ₁₀₁ to R ₁₀₇ each independently represents a hydrogen atom or a substituent, R ₁₀₈ represents a substituent, and a represents an integer of 0 to 4 La represents an n-valent aromatic hydrocarbon group and may have a substituent, provided that it has at least one cyano group in the general formula (1)),