POLYMER LIGHT EMITTING DIODES - A REVIEW ON MATERIALS AND TECHNIQUES

Polymer Light Emitting Diodes, the most promising name in the field of display technology has received tremendous attention from various research groups. Being an interdisciplinary area of research, there has been challenging experiments on material science, device physics and chemistry of this organic display. This review unveils the development of PLEDs from its inception, bringing out important milestones in the materials used and phenomenal variations observed. Starting from the classical single layer device with MEH-PPV as emissive layer, multilayer devices, use of polymer blends, incorporation of nano particles and electro phosphorescent devices are discussed. Attempts have been made to shed light into adoption of alternate design strategies, thickness dependence changes, impedance behavior and the degradation property of the device.