The Science and Technology of Organic EL Displays

For display applications, organic EL offers the possibility of efficient, low voltage, multicolour operation coupled with low production costs and robust design. Typical organic EL devices, as shown in figure 1, consist of several organic layers deposited between two electrodes The organic layers are usually deposited by vacuum sublimation1 or polymer spinning2. On applying a voltage across the device oppositely charged carriers are injected from the two electrodes and are transported to the recombination zone. The carriers then recombine forming excited molecular states which decay radiatively giving out emission with a characteristic spectrum.