ORGANIC LIGHT-EMITTING DIODE

摘要

Disclosed in an aspect is an organic light emitting diode comprising a first electrode; a second electrode facing the first electrode; and a light emitting layer interposed between the first electrode and the second electrode, and including a dopant, a first host, and a second host. The dopant is a material emitting delayed fluorescence, and the triplet energy of the first host, E_(H1) (T1) and the triplet energy of the second host, E_(H2) (T1) are larger than the triplet energy of the dopant, E_D (T1). The triplet energy of the first host, E_(H1) (T1) is 2.6-3.1 eV. Provided is the organic light emitting diode comprising a light emitting layer emitting blue delayed fluorescence having high efficiency and improved roll-off properties.