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

摘要

Heat resistance, durability to provide excellent organic electroluminescent device. An organic electroluminescent device having an organic layer of at least one layer including a light emitting layer between a pair of electrodes, the electrode comprising a positive electrode and a negative electrode on a substrate, and contains at least one kinds of the phosphorescent light emitting material in the light emitting layer, and the at least to to any of the organic layer of the first layer at least one layer of an organic electroluminescent device containing the compound represented by formula (1). (Formula (1), X is an oxygen atom or a sulfur atom. R ₁₀₁ ~ R ₁₀₇ represents a hydrogen atom or a substituent, each independently, R ₁₀₈ represents a substituent. A represents an integer of 0 to 4 . n represents an integer of 1 or more. La represents an n-valent aromatic hydrocarbon group may have a substituent. However, a cyano group and has at least one in the general formula (1));