ORGANIC LIGHT-EMITTING DIODE HAVING INTERFACE LAYER BETWEEN HOLE-TRANSPORTING LAYER AND LIGHT-EMITTING LAYER

摘要

PURPOSE: An organic light-emitting diode is provided to obtain more balanced carrier recombination and to achieve higher luminance efficiency by forming an interface layer between a hole-transporting layer and a light-emitting layer. CONSTITUTION: An organic light-emitting diode(200) includes an interface layer(204). The interface layer(204) is formed over an organic hole-transporting layer(203). The range of thickness of the interface layer(204) is between 0.5 to 5 nm. A light-emitting layer(205) is formed over the interface layer(204), and an electron-transporting layer(206) is formed over the light-emitting layer(205). Voltage/current source(208) generates an electric potential between a light-transmissive anode(202) and a cathode(207), such that anode(202) is at a more positive potential with respect to the cathode(207). Electrical conductors(20) connect the anode(202) and the cathode(207) to the voltage/current source(208).