Abstract: An organic insulator composition comprising a high dielectric constant insulator dispersed in a hyperbranched polymer and an organic thin film transistor using the insulator composition. More specifically, the organic thin film transistor comprises a substrate, a gate electrode, a gate insulating layer, a source electrode, a drain electrode and an organic semiconductor layer wherein the gate insulating layer is made of the organic insulator composition. The use of the insulator composition in the formation of a gate insulating layer allows the gate insulating layer to be uniformly formed by spin coating at room temperature, as well as enables fabrication of an organic thin film transistor simultaneously satisfying the requirements of high charge carrier mobility and low threshold voltage.

Abstract: Disclosed herein is a method for forming a metal pattern by using metal nanocrystals. The method comprises the steps of: (i) coating a photosensitive compound having a substituent, which is converted into a free carboxyl group by light exposure, on a substrate to form a photosensitive film; (ii) selectively exposing the photosensitive film to light in the presence of a photoacid generator to form a latent pattern for crystal growth having a free carboxyl group; and (iii) treating the latent pattern for crystal growth with a nanometallic solution in which metal nanocrystals can be formed to grow the metal nanocrystals on the latent pattern. According to the method, a metal wiring pattern can be formed in a cost-effective and relatively simple manner. Further, the metal pattern formed by the method can be useful in the manufacture of an electromagnetic interference filter for flat panel display devices or an electrode, and can thus be applied to devices, e.g.

Abstract: A cyclometalated transition metal complex emitting phosphorescence of high efficiency and an organic electroluminescent display device employing the same are provided. The cyclometalated transition metal complex can be employed in an organic film of an organic electroluminescent display device, can emit light at a wavelength range of 400 nm to 650 nm, and can emit white light as well when used with a green light emitting material and a red light emitting material.

Abstract: A conducting polymer thin film which comprises a conducting polymer capable of undergoing a physicochemical state change between at least two of an oxidized state, a neutral state, and a reduced state, said conducting polymer in at least one of these states retaining ionic dye molecules incorporated among the molecules thereof. The conducting polymer thin film of the present invention is reduced in power consumption, does not generate any harmful substance, and is capable of being used for continuous image formation. The process for producing the conducting polymer thin film, a method of working the conducting polymer thin film, a method of image formation with the conducting polymer thin film, and an apparatus for image formation are also disclosed.