| dc.description.abstract | In the near future, a rapid growth is sighted in applications of organic light-emitting devices (OLED) in diverse fields. The major reason behind such a rapid expansion is their ability to provide low-cost route for large-area light-emitting display technology. Their flexibility, low cost of fabrication and low operational voltages are some of the advantages that have attracted considerable interest of scientific as well as commercial community. Furthermore, organic light-emitting diodes (OLEDs) can be used in displays enabling wide viewing angle. Already the monochromatic OLEDs are being used for display panels of mobile phones and car stereos. However, Full-color display is the most covetous target into the flat-panel display market. Red, green, and blue colors with appropriate chromaticity are necessary for full-color graphical display. Recently designed new blue emitters are the most sought-after materials because adequate modifications in level of their conjugation may convert them to green or red emitters. However, the blue emitters posses high lowest unoccupied molecular orbital (LUMO) and the large band gap energy hence the electrons migration from cathode to anode is difficult. Even in case of blue light-emitting materials, besides the color, purity, thermal stability and lifetime are required to be improved. The most interesting among three color emitters are red light-emitting materials which have been intrinsically difficult to obtain from conjugated polymers and small molecules. The attempt to achieve desired color by elaborating the conjugation is accompanied by the decrease in luminescence intensity with red-shifting emission and the applicability.
Solid phase synthesis is itself a gem with the laureate of Nobel Prize. Now due to the easy accessibility of solid-phase organic synthesis, combinatorial chemistry has revolutionized the world of medicinal chemistry and has now become a must in the field of drug discovery. With the automated implements, it would serve as an even more powerful tool for the discovery of new materials possible for all kinds of applications in the industrial world. | en_US |