ORGANIC LIGHT EMITTING DISPLAY APPARATUS

摘要

Disclosed is an organic light emitting display (OLED) apparatus (1000) with improved efficiency and lifespan, wherein the OLED apparatus includes an anode (400), a cathode (600), and a light-emitting unit (500) disposed in-between, wherein the light-emitting unit includes a first emission layer (512), and a first hole transporting layer (511) having first and second materials, wherein the first material has a higher hole mobility than that of the second material so as to improve a transfer of holes from the first hole transporting layer (511) to the first emission layer (512), and the second material has a higher triplet energy level than that of the first material so as to reduce a transfer of electrons from the first emission layer (512) to the first hole transporting layer (511).