ORGANIC ELECTROLUMINESCENT COMPOUND, ORGANIC ELECTROLUMINESCENT ELEMENT, AND ILLUMINATING DEVICE AND DISPLAY DEVICE INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain an organic EL element where change in resistance of a light-emitting layer is little during electrification time by using a novel organic EL element compound, and to provide an organic EL element having excellent chromaticity of emission spectrum where change in emission characteristics due to aging is little, as a side effect thereof, and to provide an illuminating device and a display device using the organic EL element.SOLUTION: The organic electroluminescent compound if the present invention has a neutral part where the electron density of the highest occupied molecular orbit and the minimum vacant molecular orbit is low, when calculating the electron density distribution state of an organic compound by a molecular orbital method, and satisfies specific three requirements.