Abstract
Large area Organic Light Emitting Diodes (OLEDs) are promising candidates for next generation solid state lighting application, with very good efficiencies and performances. OLED unit consists of very thin layers of organic materials over a large area and the major challenge remains in the fabrication of large area devices without defects, which cause sudden failure. Phosphorescent OLED devices were fabricated with an emissive area of 8 cm2 x 8 cm2 and various factors contributing to the formation of defects and non-uniformity were identified and mechanism of short formation was studied. Further improvements were incorporated in the device fabrication to achieve defect free OLED panels.
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