Accession Number : ADA330184

Title :   Pyridine Based Polymer Light-Emitting Devices

Descriptive Note : Technical rept.

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS

Personal Author(s) : Wang, Y. Z. ; Fu, D. K. ; Swager, T. M. ; MacDiarmid, A. G. ; Epstein, A. J.

PDF Url : ADA330184

Report Date : 20 SEP 1997

Pagination or Media Count : 12

Abstract : 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 poly(9-vinyl carbazole) (PVK) as a hole transporting/electron blocking layer. This improves the device efficiency and brightness significantly due to the charge confinement and exciplex emission at the PVK/emitting 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.

Descriptors :   *POLYMERS, *PYRIDINES, *LIGHT EMITTING DIODES, EMISSION, REPRINTS, STABILITY, INTERFACES, LAYERS, ELECTRON TRANSPORT, LIGHT, EFFICIENCY, COPOLYMERS, ALTERNATING CURRENT, TRANSPORT PROPERTIES, ELECTRODES, QUANTUM EFFICIENCY, POWER, ANILINES.

Subject Categories : Organic Chemistry
      Polymer Chemistry
      Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE