COMPOSITION CONTAINING A METAL COMPLEX AND ORGANIC COMPOUND, AND LIGHT-EMITTING ELEMENT USING SAID COMPOUND

摘要

Disclosed is a composition containing a metal complex and an organic compound, wherein the difference between the absolute value of the energy level of the lowest unoccupied molecular orbit of said metal complex and the absolute value of the lowest unoccupied molecular orbit of said organic compound, as calculated with a computational technique, is less than 0.40 eV.