Research On The Influence Of OLED Light-emitting Layer On The Viewing Angle Characteristics Of The Device

In recent years,top-emitting OLED devices,with their unique properties,have great potential for the future commercialization of large full-color displays and efficient lighting devices.However,the enhancement of the viewing angle characteristics of the top emitter device has not been satisfactorily solved,the previous study of the cathode film thickness and the material of each film layer,but less research on the structure of the device,so we start from the device structure,the study of the exciton compound zone position and the effect of the luminescent layer doping ratio on the viewing angle characteristics of the top emitter device,and found that the exciton compound zone position and the luminescent layer doping ratio on the viewing angle characteristics of the top emitter device will have a significant impact,find the regularity of which can greatly improve the performance of the device.This paper focuses on the influence of the position of the exciton complex region in the luminous layer and the doping ratio of the luminous layer on the perspective characteristics.We measured the n and k values of the materials in each functional layer and the various parameters needed for the simulation;then we designed the device structure of the experiment using Setfos software,changed the position of the compound region of the excitons,and carried out the simulation to obtain the different viewing characteristics of the device at different positions,and found the better position of the compound region of the excitons with guiding significance.According to the guiding results obtained from the simulation,change the position of the exciton composite zone and the luminescent layer of the object doping ratio to produce the corresponding OLED device,the visual role of the device to optimize the bias;by adding HTL and EBL thickness to compensate for chromaticity,so that the monochromatic device in the same standard chromaticity test its emission characteristics,and found that with the composite zone position from 0/0.25/0.5/1 changes in the red,green,blue device JNCD in each viewpoint has increased,brightness in each viewpoint has decreased.At a viewing angle of 20°/40°/60°,there was a decrease of 8.9%/20.7%/24.4%,40.4%/45.8%/63.2%,27.8%/33.3%/53.6% in the red,green and blue composite zones at position 0 compared to position 1 JNCD respectively.Brightness increases of3%/27.2%/74.7%,0.9%/16.2%/104%,3.7%/12.8%/21.6%.2.Finally,we carry out the study of the effect of doping ratio on the viewing anglecharacteristics,we design the device structure of the experiment using Setfos software,change the doping ratio,conduct simulations to obtain the viewing angle characteristics of the devices at different doping ratios,and find the better doping ratio with guiding significance from it.The JNCD and brightness of the red,green and blue devices were reduced in all viewing angles with the improvement of the doping ratio of the object,and at 20°/40°/60°,the JNCD and brightness reduction of the red 5% object doping ratio compared to the 1% object doping ratio were 3.7%/26.6%/44.2%,11.6%/30.4%/17.7%,respectively;the JNCD and brightness reduction of the blue 5%object doping ratio compared to the 1% object doping ratio were 19.9%/26.4%/44.3%,2.7%/10.5%/12.7%,respectively;the green 15% object doping ratio compared to the5% object doping ratio was 12%/24.2%/42.5%,2.5%/12.7%/9.2%.