HETEROCYCLIC COMPOUND, ORGANIC LIGHT-EMITTING DIODE COMPRISING THE HETEROCYCLIC COMPOUND, AND FLAT PANEL DISPLAY DEVICE COMPRISING THE ORGANIC LIGHT-EMITTING DIODE

摘要

A heterocyclic compound represented by Formula 1 below, an organic light-emitting diode including the same, and a flat panel display device including the organic light-emitting diode: where X is *—Ar1 or wherein Ar1, Ar2, R1, R2, R3, R4, Y1, Y2, Y3, Y4, a, b, c, and d are as defined in the specification.