Pyridine Based Polymer Light-Emitting Devices
OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
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Pyridine-based conjugated polymers and copolymers have been shown to be excellent candidates for polymer light-emitting devices in various device configurations. The high electron affinity of pyridine based polymers enables the use of relatively stable metals such as Al as an electron injecting contact. Taking advantage of the better electron transport properties of the pyridine-containing polymers, we fabricate bilayer devices utilizing poly9-vinyl carbazole PVK as a hole transportingelectron blocking layer. This improves the device efficiency and brightness significantly due to the charge confinement and exciplex emission at the PVKemitting polymer interface. The incorporation of conducting polyaniline network electrode into PVK reduces the device turn on voltage significantly while maintaining the high quantum efficiency, thus improving the device power efficiency. Novel device configurations such as symmetrically configured AC light-emitting SCALE devices enable the device to work under both forward and reverse bias as well as in AC modes, potentially improving the device stability.
- Organic Chemistry
- Polymer Chemistry
- Electricity and Magnetism
- Atomic and Molecular Physics and Spectroscopy