Abstract: Polyamic acid including structural units of the following Chemical Formulae 1 and 2 is provided: In Chemical Formulae 1 and 2, each substituent is as defined in the detailed description.

Abstract: A light guide plate for displaying a three-dimensional (3D) image, and a 3D image display apparatus employing the same. The light guide plate includes a transparent body formed in a flat panel shape, and for guiding light with total internal reflection in the transparent body; and a plurality of viewing zone separation units aligned inside the transparent body. Light incident on two side surfaces of the light guide plate is separated into different viewing zones by reflective surfaces of the viewing zone separation units.

Abstract: Disclosed herein are a novel dye for a photoelectric device and a photoelectric device comprising the dye. More particularly, the dye for a photoelectric device incorporates different quaternary ammoniums into a carboxyl or phosphoric acid-substituted bipyridyl ligand of the dye, and a photoelectric device comprising the same. The dye for a photoelectric device as disclosed herein exhibits improved photosensitivity and light absorbing characteristics, thereby making it possible to fabricate a highly efficient photoelectric device when the dye is included in the device.

Abstract: A polyamic acid that is a condensation reaction product of one or more acid anhydrides and one or more carbonate-based diamine compounds, along with a polyimide obtained by imidizing the polyamic acid, a method of manufacturing the same, and a polyimide film made therefrom.

Abstract: Disclosed herein is a method for modifying the surface of a counter electrode. According to the method, the surface modification is achieved by treating the surface of a counter electrode with a polyethylene glycol derivative having a pendant group at one end. Also disclosed is a counter electrode whose surface is modified by the method. The electron transfer rate at the interface between the counter electrode and an electrolyte layer of a photovoltaic device is increased and the affinity of the counter electrode for the electrolyte layer is improved, resulting in an improvement in the power conversion efficiency of the photovoltaic device.

Abstract: Disclosed herein are a polymer solar cell, comprising a substrate, a first electrode, a hole injection layer, a photoactive layer, and a second electrode, characterized in that an electron-accepting layer is formed between the photoactive layer and the second electrode, and a method of manufacturing the polymer solar cell. The polymer solar cell comprises an electron-accepting layer between the photoactive layer and the second electrode, thereby assuring excellent power conversion efficiency. Furthermore, high power conversion efficiency can also be attained in a low-temperature thermal annealing process.

Abstract: A polyimide precursor composition includes an oligomer or polymer having a substituted or unsubstituted carbonyl group only in a side chain and a diamine compound. A method of manufacturing a polyimide, and a polyimide film, are also disclosed.

Abstract: A polymer including a structure represented by the following Chemical Formula 1, and a composition and a film including the same are provided. In the above Chemical Formula 1, each substituent is as defined in the detailed description.

Abstract: Disclosed are an organosilicate compound represented by the following Chemical Formula 1, and a composition and a film including the same. In the above Chemical Formula 1, each substituent is as defined in the detailed description.

Abstract: A dye-sensitized solar cell using an ion-bound oligomer complex is provided. The dye-sensitized solar cell comprises an electrolyte, comprising a first oligomer having a C5-30 heteroaryl group containing a nitrogen heteroatom as a basic functional group at both ends of the molecule, mixed with a second oligomer having an acidic functional group selected from among carboxylic acid, phosphoric acid, and sulfonic acid, at both ends of the molecule, to thus form a salt, which then leads to an ion-bound oligomer complex that constitutes the electrolyte. The solar cell exhibits excellent mechanical properties, can be manufactured conveniently, and can have a high energy conversion efficiency.

Abstract: Disclosed is a novel dye for use in a photoelectronic device, wherein the photoelectronic device is comprised of a photoanode comprising the dye. According to the novel dye, the dye is derived through the introduction of a group which narrows the dihedral angle of the dye ligand as well as through the introduction of conjugated groups. Since the dye has improved light sensitivity and absorption properties, it can be used to fabricate a photoelectronic device with high power conversion efficiency.

Abstract: A cross-linked metal-containing polyamic acid includes a metal and a cross-linked polyamic acid which is a condensation product of an acid anhydride represented by Formula 1 and a diamine compound: where the group comprises a C5-C20 carbocycle having a cross-linkable functional group or a C4-C20 heterocycle having a cross-linkable functional group. A cross-linked metal-containing polyimide, a method of manufacturing the cross-linked metal-containing polyimide, a polyimide film including the cross-linked metal-containing polyimide, and a method of making the polyimide film are disclosed.

Abstract: Provided are a self-crosslinking polyamic acid being a condensation reaction product of melamine-based material, an acid anhydride, and a diamine compound, a self-crosslinking polyimide being a condensation and imidization reaction product of melamine-based material, an acid anhydride, and a diamine compound, a method of preparing the self-crosslinking polyimide, and a self-crosslinking polyimide film including the self-crosslinking polyimide.

Abstract: Disclosed herein are a metal oxide paste composition comprising a carboxylic ester dispersant and/or a phosphate dispersant, and a method for manufacturing a semiconductor electrode for solar cells using the same. The disclosed metal oxide paste composition improves the dispersibility of metal oxide nanoparticles. Thus, if it is used to manufacture a semiconductor electrode for solar cells, it will allow the increased adsorption of a dye, thus improving the photoelectric efficiency of the resulting solar cell.

Abstract: Disclosed herein is a material, and a solid electrolyte and a photovoltaic device using the same. When the material is used as a hole transporting layer material of the photovoltaic device, the reduction of an electrolytic layer resulting from leakage or volatilization of an electrolytic solution is prevented, thus the battery characteristics, long-term stability, and reliability of the photovoltaic device are improved.

Abstract: An organic EL device has a layer containing a polyimide having a triphenylamine derivative (TPD) unit. The use of the polyimide as a polymer layer material can ensure solvent selectivity in coating the light-emitting layer and the organic EL device exhibits good luminance efficiency even after a prolonged period use.

Abstract: Disclosed herein is a monomer for binding nano-metal, which is useful for the preparation of a conductor having increased conductivity with ensuring flexibility and transparency. Polymerization of the monomer for binding nano-metal provides a conductive polymer composite including a nano-metal rod. A method of preparing the conductive polymer composite is also provided.

Abstract: A blue-emitting polymer in which a bisindenospirofluorene unit is incorporated in a polyarylene polymer backbone, and an organic EL device using the blue-emitting polymer as a light-emitting material. One example of the blue-emitting polymer may be represented by Formula 1: where Ar, R1 through R14, X1 and X2, M and n are defined in the specification. The organic EL device exhibits excellent emission efficiency, low turn-on voltage, good color stability and color purity.

Abstract: A thieno[3,2-b]indole-based polymer and an organo-electroluminescent device in which the polymer is introduced into an organic layer are provided. The thieno[3,2-b]indole-based polymer may be easily prepared and has blue light-emitting characteristic. The organo-electroluminescent device adopting the organic layer using the thieno[3,2-b]indole-based polymer has improved color purity, efficiency, and luminance characteristics.

Abstract: A blue light polymer containing an indenocarbazole unit in its main polyarylene chain and an organoelectroluminescent device using the same are provided. The organoelectroluminescent device exhibits high luminous efficiency and high color purity.