US Patent 11271167 Organic light-emitting device

Disclosed is an organic light emitting diode including a cathode, an anode, a light emitting layer provided between the cathode and the anode, a first electron transporting layer including a heterocyclic compound represented by Formula 1 and provided between the cathode and the light emitting layer, and a second electron transporting layer including a host material including one or two or more of compounds represented by Formulae 3 to 5 and one or two or more n-type dopants selected from alkali metals and alkaline earth metals and provided between the cathode and the first electron transporting layer: