Synthetic electroluminescent polymers

H. Meng, W. Yu, and W. Huang, Facile synthetic route to a novel electroluminescent polymer — poly(p-phenylene vinylene) containing a fully conjugated aromatic oxadiazole side chain, Macromolecules, 32 8841-8847, 1999. 

The company s advanced materials business is based on its core technologies of organic synthetic chemistry, polymer chemistry and biochemistry. Advanced materials projects include organic electroluminescent materials, next generation flexible PCB, flat panel display materials and nanotechnology applications. 

Polyfarylene vinylene)s form an important class of conducting polymers. Two representative examples of this class of materials will be discussed in some detail here. There are poly(l,4-phenylene vinylcne) (PPV) 1, poly(l,4-thienylene viny-lenc) (PTV) 2 and their derivatives. The polymers are conceptually similar PTV may be considered as a heterocyclic analog of PPV, but has a considerably lowci band gap and exhibits higher conductivities in both its doped and undoped stales. The semiconducting properties of PPV have been shown to be useful in the manufacture of electroluminescent devices, whereas the potential utility of PTV has yet to be fully exploited. This account will provide a review of synthetic approaches to arylene vinylene derivatives and will give details an how the structure of the materials relate to their performance in real devices. 

Research on semiconductor nanoparticle technology by chemists, materials scientists, and physicists has already led to the fabrication of a number of devices. Initially, Alivisatos and co-workers developed an electroluminescence device from a dispersion of CdSe nanoparticles capped with a conducting polymer349 and then improved on this by replacing the polymer with a layer of CdS, producing a device with efficiency and lifetime increased by factors of 8 and 10, respectively. 0 Chemical synthetic methods for the assembly of nanocrystal composites, consisting of II-VI quantum dot polymer composite materials,351 represent one important step towards the fabrication of new functional devices that incorporate quantum dots. 

Romdhane S., Marai F., Hassine L., Fave J.L., Roussel J., Majdoub M., Bouchriha H., UV and white electroluminescence in AVB polymer Synthetic Metals, Volume 139, Issue 2, 5 September 2003, Pages 245-249... 

UV and white electroluminescence in AVB polymer Synthetic Metals, Volume 139, Issue 2, 5 September 2003, Pages 245-249... 

Poly(phenylene vinylene) (PPV) is another valuable conjugated polymer, as the synthetic process of PPV is simple and low cost. PPV possesses excellent photoluminescent (PL) and electroluminescent (EL) properties, as well as photovoltaic (PV) and nonlinear optical properties [57]. These properties have led to its being used in broad applications, in such areas as light-emitting diodes (LEDs) and flat-panel displays and photonics applications such as wave-guiding and all-optical switching. 

Shim, H.-K., Kang, 1. N., and Zyung, T., Electroluminescence of blend polymers composed on main and side chain chromophores, 96 International Conference on Synthetic Metals, Salt Lake City, July 28-August 3, 1996. 

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