Abstract: The present invention relates to an organic compound that can enhance the light efficiency of light extracted to the outside of an organic light-emitting element due to having a low refractive index, and thus can be effectively utilized as a material for a light efficiency improving layer provided in the organic light-emitting element. The compound according to the present invention can be employed in the light efficiency improving layer to achieve a high-efficiency, long-lifespan organic light-emitting element having improved light-emitting efficiency, color purity, and lifespan characteristics, as well as low-voltage driving characteristics, and thus can be effectively used in various lighting and display elements.

Abstract: The present invention relates to an organic light emitting diode which complexly includes capping layers having different refractive indexes to improve light extraction efficiency, reduce a driving voltage, and improve current efficiency.

Abstract: The present invention relates to an organic light emitting diode which includes a capping layer with a low refractive index to improve light extraction efficiency, thereby reducing a driving voltage, improving power efficiency, and improving current efficiency.