Improved color purity of green OLED device based on Au thin film

Au was used as anode in some kind of organic electroluminescent devices.Sometimes transparent Au electrodes arc required,which means that the thickness of Au electrode should be as thin as possible.Therefore,two metals together forming an electrode become a choice.In the present paper,translucent Au/Al layer was inserted to anode side,and OLKI) device with the Structure of UO/Al(16 nm)/Au(10 nm)/TPD(30 nm)/AlQ(30 nm)/LiF(0.5 nm)/Al was prepared.There is a spectral narrowing phenomenon on the device ITO/TPD(30 nm)/AlQ(30 nm)/LiF(0.5 nm)/Al,and through analysis and experiment it was found that this phenomenon comes from selective permeability to light of Au thin film rather than the microcavity effect.The device maintains wide viewing angle,without the angular dependence.And the color purity of device with Au thin film is improved.