Blue Phosphorescent Organic Light Emitting Device Having a Minimal Lamination Structure

Abstract

Disclosed is a blue phosphorescent organic light emitting device having a minimal lamination structure. The device includes an anode; an emitting layer formed on the anode and including a host and a dopant; an electron transport layer formed on the emitting layer; and a cathode formed on the electron transport layer. A difference between a work function of the anode and a high occupied molecular orbital (HOMO) energy level of the emitting layer is less than 1.0 eV, and a difference between a low occupied molecular orbital (LUMO) energy level of the emitting layer and an LUMO energy level of the electron transport layer is less than 1.0 eV.

Dependencies are inferred from the claim text.