ORGANIC LIGHT-EMITTING DEVICE

摘要

An organic light-emitting device including: a first electrode, a hole transport region including a first hole transport layer (HTL), an emission layer, an electron transport region; and a second electrode; wherein the first HTL includes a first compound and a second compound, the emission layer includes a third compound and a fourth compound, the electron affinity of the second compound is greater than the electron affinity of the first compound, a lowest unoccupied molecular orbital (LUMO) energy level of the fourth compound is greater than a LUMO energy level of the third compound, the second compound and the third compound are different from each other, and the minimum anionic dissociation energy of the second compound is greater than the triplet energy of the third compound.

主权项

1. An organic light-emitting device comprising:
a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode; a hole transport region between the first electrode and the emission layer, the hole transport region comprising a first hole transport layer directly contacting the emission layer; and an electron transport region between the second electrode and the emission layer, wherein the first hole transport layer comprises a first compound and a second compound, the emission layer comprises a third compound and a fourth compound, an electron affinity of the second compound is greater than an electron affinity of the first compound, a lowest unoccupied molecular orbital (LUMO) energy level of the fourth compound is greater than a LUMO energy level of the third compound, the second compound and the third compound are different from each other, and a minimum anionic decomposition energy of the second compound is greater than a triplet energy of the third compound.