Patent ID: 9070893
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. An organic light-emitting device comprising: a first electrode; a second electrode; an emission layer between the first electrode and the second electrode; a first hole transport layer between the first electrode and the emission layer; and a second hole transport layer between the first hole transport layer and the emission layer, wherein the first hole transport layer comprises a first compound represented by Formula 1 and the second hole transport layer comprises a second compound represented by Formula 2: wherein, in Formulae 1 and 2, Ar a1 to a3 are each independently an integer from 0 to 5; c1 is an integer from 1 to 5; R R b1, b4, c2, and c3 are each independently an integer from 1 to 4; and b2 and b3 are each independently an integer from 1 to 3.