Electrode and organic electroluminescent device using same

Abstract

An electrode and an organic electroluminescent device using the same are provided. The electrode comprises a first conductive layer (), a second conductive layer () and a third conductive layer () that are arranged in a stacked manner The second conductive layer () has a single-layer structure or multi-layer composite structure formed by at least one of alkali earth metal, alkali earth metal alloy and alkali earth metal compound, and the third layer () has a work function of less than 3 eV. The respective conductive layers of the electrode can compensate with respect to the defects in one another, thereby making the performance of the electrode more stable. In the meantime, because the work function of the third conductive layer () is less than 3 eV, the barrier of organics-metal interface can be effectively reduced for guiding the electron injection, thereby increasing the light-emitting efficiency of device. Also, because the electrode has relatively good transmittance, it can be used as a transparent electrode.