Abstract: An organic light-emitting device has a color modulation layer. The organic light-emitting device comprises a substrate, a first electrode positioned on the substrate and a second electrode positioned on the first electrode, wherein at least one of the first electrode and the second electrode is transparent. An organic functional layer having at least an emission layer is interposed between the first electrode and the second electrode. A color modulation layer formed by a laser-induced thermal imaging method is positioned on a surface opposite to a surface adjacent to the emission layer of the transparent electrode, wherein the color modulation layer is at least one of a color filter and a color conversion medium.

Abstract: An organic EL device which includes a first electrode, a hole transport layer, a light-emitting layer, and the second electrode, wherein the light-emitting layer includes a mixed light-emitting film of a host substance, which is capable of transferring an energy to another light-emitting polymer by absorbing the energy, and a phosphorescent dopant which is capable of emitting light using a triplet state after absorbing the energy received. Accordingly, the light-emitting layer can be patterned, and a color purity and light-emitting characteristics of a full color organic polymer EL device, produced through a laser induced termal imaging operating, can be improved.

Abstract: The present invention relates to a full color organic electroluminescent device and a method for fabricating the same and provides a full color organic electroluminescent device. The invention reduces misalignment errors caused by fine patterning of the emitting layer by reducing the steps of the fine patterning process. In particular, the blue emitting layer functions as a hole inhibition layer which results in superior color purity and improved stability for the color organic electroluminescent device. The use of such a blue emitting layer also reduces the manufacturing steps. The device comprises a substrate; a first electrode pattern formed on the substrate; a red emitting layer formed by patterning a red emitting material on a red pixel region of the first electrode pattern and a green emitting layer formed by patterning a green emitting material on a green pixel region of the first electrode pattern.

Abstract: A donor film includes a base film, a light-to-heat conversion layer formed on the base film, and a transfer layer formed on the light-to-heat conversion layer, wherein the transfer layer is formed of at least two layers and its first layer adjacent to the base film is a polymeric material and its second layer above the polymeric material is a small molecular material. The donor film allows a polymeric material to be used as an upper layer in the organic layers constituting the full color organic EL display device when a lower layer of the organic layer is formed of a small molecular organic material. The donor film, a method for fabricating the donor film, and a full color organic EL display device fabricated using this donor film are provided. The EL display device according to the present invention has superior properties.

Abstract: An OLED has a doped emission layer (EML). The OLED comprises a first electrode, a second electrode, and an EML having a host material and a light-emitting dopant and interposed between the first electrode and the second electrode, wherein the light-emitting dopant has a concentration gradient between a first surface close to the first electrode of the EML and a second surface opposite to the first surface. As a result, luminous efficiency of the OLED can be enhanced and a driving voltage can also be reduced.

Abstract: An organic electroluminescent display (OLED) device having an anode electrode covered with a solution-coated ultra-thin polymer film (reforming layer) is disclosed. In one embodiment, an OLED device includes a substrate having a first anode electrode formed thereon. The first anode electrode is covered with an ultra-thin polymer film (reforming layer). An organic emission layer is formed over an upper surface of the reforming layer, and a second cathode electrode is formed over the organic emission layer. The reforming layer is made of a material selected from a general polymer that is a soluble polymer, a heat resistant polymer, and a fluorine-based polymer having one or more functional groups. The solution coating methods which may be used to apply the reforming layer include a spin coating method, a doctor blade method, a dip coating method, a roll coating method, a spray coating method, and an ink jet method.

Abstract: An organic EL display device includes first and second electrodes with a light-emitting layer interposed therebetween and an organic soluble derivative layer arranged between the first electrode and the light-emitting layer, wherein the organic soluble derivative layer prevents impurities from being diffused to the light-emitting layer.

Abstract: The present invention relates to an organic electroluminescent display device comprising a UV stabilizer and provides an organic electroluminescent display device whose characteristics are not degraded by ultraviolet rays even after being exposed to sunlight by providing an organic electroluminescent display device comprising a substrate, a first electrode formed on the substrate, a light emitting layer formed on the first electrode, and a second electrode formed on the upper part of the light emitting layer, wherein the light emitting layer is doped with a UV stabilizer, and the UV stabilizer has an absorption range of 420 nm or less.

Abstract: An organic light-emitting device including an anode, a cathode, an emission layer interposed between the anode and the cathode, and at least one of the hole injecting layer and the hole transporting layer interposed between the anode and the emission layer, wherein the at least one of the hole injecting layer and the hole transporting layer includes a host material, and a dopant material as an electron acceptor, wherein the dopant material has an electron affinity greater than that of the host material by at least 0.1 eV.

Abstract: A low molecular weight full color organic electroluminescent device and a method to fabricate the low molecular weight full color organic electroluminescent device enable scale-up and mass-production of an organic electroluminescent device of high resolution by providing a donor film of a low molecular weight full color organic electroluminescent device, the donor film including a substrate film; a photothermal conversion layer formed on the upper part of the substrate film; and a transfer layer formed on the upper part of the photothermal conversion layer and formed of a low molecular weight material. A part of the transfer layer that is irradiated and heated by a laser is separated from the photothermal conversion layer according to a change of an adhesion force of the transfer layer with the photothermal conversion layer, while part of the transfer layer which is not irradiated by the laser is fixed to the photothermal conversion layer.

Abstract: An organic electroluminescent device has an improved lifetime and may be driven at a low voltage. The organic electroluminescent device includes: a substrate; a first electrode to define a pixel region on the substrate; multiple organic film layers to perform light emission on the first electrode; and a second electrode laminated on the multiple organic film layers, wherein the multiple organic film layers include at least an emitting layer, and at least one of a hole injection layer and a hole transfer layer. The at least one of the hole injection layer and the hole transfer layer includes an electron acceptor material.

Abstract: An organic electroluminescent (EL) device includes a substrate, a first electrode disposed on the substrate, an emission layer comprising a polymer disposed on the first electrode, a second electrode formed on the emission layer, and a metal infiltration preventing layer, formed between the emission layer and the second electrode, for preventing a second electrode forming metal from infiltrating into the emission layer. A manufacturing method includes operations to prepare the EL device.

Abstract: An organic EL device in which light-emitting efficiency, color purity and laser induced thermal imaging characteristics are improved by providing with an organic EL device comprising a first electrode, a hole transport layer, a light-emitting layer, and a second electrode, wherein the light-emitting layer uses a mixture of an optically active low molecular electric charge transport material and a high molecular light-emitting substance.

Abstract: An organic EL device which includes a first electrode, a hole transport layer, a light-emitting layer, and the second electrode, wherein the light-emitting layer includes a mixed light-emitting film of a host substance, which is capable of transferring an energy to another light-emitting polymer by absorbing the energy, and a phosphorescent dopant which is capable of emitting light using a triplet state after absorbing the energy received. Accordingly, the light-emitting layer can be patterned, and a color purity and light-emitting characteristics of a full color organic polymer EL device, produced through a laser induced termal imaging operating, can be improved.

Abstract: An organic EL display device includes first and second electrodes with a light-emitting layer interposed therebetween and an organic soluble derivative layer arranged between the first electrode and the light-emitting layer, wherein the organic soluble derivative layer prevents impurities from being diffused to the light-emitting layer.

Abstract: A light-emitting polymer composition for a light-emitting layer in an organic EL display device includes at least first and second light-emitting polymers having different interfacial characteristics which lower a cohesion between elements of the first and second light-emitting polymers.

Abstract: A photoconductive composition and a display device adopting a photoconductive layer formed of the composition. The photoconductive composition includes an electron donor, an electron acceptor, a charge transmitting substance, a binder, a surfactant and a solvent, and the photoconductive composition is characterized in that a 1,4-diphenyl-1-butene-3-yne derivative is used as the electron donor. The photoconductive composition has excellent sensitivity and thermal decomposition property. Thus, there are scarcely residues left after the sintering process, thereby effectively preventing deterioration in image quality of a display device.

Abstract: A photoconductive composition and a display device adopting a photoconductive layer formed of the composition. The photoconductive composition includes an electron donor, an electron acceptor, a charge transmitting substance, a binder, a surfactant and a solvent, and the photoconductive composition is characterized in that a 1,4-diphenyl-1-butene-3-yne derivative is used as the electron donor. The photoconductive composition has excellent sensitivity and thermal decomposition property. Thus, there are scarcely residues left after the sintering process, thereby effectively preventing deterioration in image quality of a display device.