Abstract
Organic Light Emitting Diodes(OLEDs) are usually fabricated by vacuum deposition. The vacuum deposition need strict process environmental conditions. This process needs expensive equipment, and the low utilization ratio of material. It is difficult to mass-fabric -ate large-area OLEDs in the future. Our lab developed the liquid process of continuous delivery blade coating and multi-delivery blade coating. This solution-processable blade coating don’t need strict process environmental conditions, and have high utilization ratio of material. The production cost of the OLEDs will be significantly reduced. The main objective of this thesis was using this blade coating to fabricate large-area OLEDs with a size of "62×110 " 〖"mm" 〗^"2" and "57×105 " 〖"mm" 〗^"2" . The thin film uniformity and stability of devices were improved by optimizing the experimental parameters. Optimizing thin film uniformity by blade coating speed adjustment and changing sol -vent of the organic material solution. Some experimental method can improve devices st -ability include the following: replacing electron transport material of the single layer stru -cture with EPH409, adjusting CsF/Al electrode deposition conditions, hole injection layer and emission layer increase thickness, evaporating SiO on base.,Devices operated is up to 400 hours.