| abstract |
More particularly, the present invention relates to an organic light emitting device capable of realizing excellent light emitting efficiency, light emission luminance, color purity, (ETM), a light emitting layer (EML), a hole transporting layer (HTM), and the like. The first electrode and the second electrode, such as an electron transport layer It is possible to develop a material which can be used in various ways such as various organic films between electrodes, to improve the performance such as the efficiency increase and the reduction of the driving voltage, and to maximize the capability as the OLED material. |