Patent ID: 9666819
Date: 2017-05-30
CPC Classifications: H01L

Claim:
1. An organic light emitting diode, comprising: a first electrode layer disposed on a base substrate; a second electrode layer disposed on the first electrode layer and facing the first electrode layer; an emitting layer disposed between the first electrode layer and the second electrode layer; a hole transport region disposed between the emitting layer and the first electrode layer; an auxiliary layer disposed between the hole transport region and the emitting layer, the auxiliary layer comprising a first material and a second material; and an electron transport region disposed between the emitting layer and the second electrode layer, wherein: a lowest unoccupied molecular orbital (LUMO) energy level of the first material is higher than a LUMO energy level of the emitting layer; a LUMO energy level of the second material is lower than the LUMO energy level of the emitting layer; and a highest occupied molecular orbital (HOMO) energy level of the first material is higher than a HOMO energy level of the second material.