Patent ID: 8119258
Filing Date: 2012-02-21
Classification: H01L,Y10S

Abstract:
1. A white Organic Light Emitting Device (OLED) comprising: an anode and cathode spaced apart from each other; first, second, and third light emitting layers sequentially stacked between the anode and the cathode; and an electron injection induction layer, arranged between the second light emitting layer and the third light emitting layer, to induce electrons to flow into the second light emitting layer from the third light emitting layer; wherein a difference between a Lowest Occupied Molecular Orbital (LUMO) energy level of the electron injection induction layer and the LUMO energy level of a dopant in the second light emitting layer is 0.4 eV or below, the distance between the first light emitting layer and the anode is shorter than the distance between the third light emitting layer and the anode, and the first light emitting layer comprises a host material of a triphenylamine derivative.