Abstract: A color conversion film is disclosed that absorbs light from an organic electroluminescent part emitting blue-green light and converts the light to visible light at a longer wavelength. The color conversion film includes two different dyes. A first dye is a polymer dye with an average molecular weight of 1000 to 1,000,000 that absorbs light incident on the color conversion film and transfers the energy of the light to a second dye. The second dye is a dye that receives the energy from the first dye and emits light. With a multicolor-emitting, organic electroluminescent device including the color conversion film, it is possible to achieve excellent conversion efficiency without increasing the thickness of the color conversion film as in a conventional device using a binder resin.

Abstract: A process for producing a color conversion filter uses an ink jet recording method, which can form a color conversion layer at a desired position without the need to separately form partition walls, and a process for producing an organic EL display. The process for producing a color conversion filter includes forming a black matrix having a plurality of opening parts on a transparent substrate, forming at least two types of color filter layers independently of each other on a black matrix to which dissimilar color filter layers are adjacent, to form a partition wall, at least two of the color filter layers being superimposed on top of each other, and forming a color conversion layer by ink jet recording onto at least one of the color filter layers.

Abstract: A process for producing a color conversion filter uses an ink jet recording method, which can form a color conversion layer at a desired position without the need to separately form partition walls, and a process for producing an organic EL display. The process for producing a color conversion filter includes forming a black matrix having a plurality of opening parts on a transparent substrate, forming at least two types of color filter layers independently of each other on a black matrix to which dissimilar color filter layers are adjacent, to form a partition wall, at least two of the color filter layers being superimposed on top of each other, and forming a color conversion layer by ink jet recording onto at least one of the color filter layers.

Abstract: A process for producing a color conversion filter uses an ink jet recording method, which can form a color conversion layer at a desired position without the need to separately form partition walls, and a process for producing an organic EL display. The process for producing a color conversion filter includes forming a black matrix having a plurality of opening parts on a transparent substrate, forming at least two types of color filter layers independently of each other on a black matrix to which dissimilar color filter layers are adjacent, to form a partition wall, at least two of the color filter layers being superimposed on top of each other, and forming a color conversion layer by ink jet recording onto at least one of the color filter layers.

Abstract: An organic EL device is provided with a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer between an anode and a cathode, wherein the hole injection layer is obtained by doping a hole transport material with an electron-accepting impurity, and the ionization potential Ip(HIL) of the material of the hole injection layer that composes the hole injection layer (also referred to as a hole injection material in the present description), the ionization potential Ip(HTL) of the hole transport material, and the ionization potential Ip(EML) of the material of the light-emitting layer (also referred to as a light-emitting layer material in the present description) respectively satisfy the relationship of Ip(EML)>Ip(HTL)?Ip(HIL)?Ip(EML)?0.4 eV.

Abstract: A color conversion film is disclosed that absorbs light from an organic electroluminescent part emitting blue-green light and converts the light to visible light at a longer wavelength. The color conversion film includes two different dyes. A first dye is a polymer dye with an average molecular weight of 1000 to 1,000,000 that absorbs light incident on the color conversion film and transfers the energy of the light to a second dye. The second dye is a dye that receives the energy from the first dye and emits light. With a multicolor-emitting, organic electroluminescent device including the color conversion film, it is possible to achieve excellent conversion efficiency without increasing the thickness of the color conversion film as in a conventional device using a binder resin.

Abstract: An organic EL device is provided with a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer between an anode and a cathode, wherein the hole injection layer is obtained by doping a hole transport material with an electron-accepting impurity, and the ionization potential Ip(HIL) of the material of the hole injection layer that composes the hole injection layer (also referred to as a hole injection material in the present description), the ionization potential Ip(HTL) of the hole transport material, and the ionization potential Ip(EML) of the material of the light-emitting layer (also referred to as a light-emitting layer material in the present description) respectively satisfy the relationship of Ip(EML)>Ip(HTL)?Ip(HIL)?Ip(EML)?0.4 eV.

Abstract: A process for producing a color conversion filter uses an ink jet recording method, which can form a color conversion layer at a desired position without the need to separately form partition walls, and a process for producing an organic EL display. The process for producing a color conversion filter includes forming a black matrix having a plurality of opening parts on a transparent substrate, forming at least two types of color , filter layers independently of each other on a black matrix to which dissimilar color filter layers are adjacent, to form a partition wall, at least two of the color filter layers being superimposed on top of each other, and forming a color conversion layer by ink jet recording onto at least one of the color filter layers.

Abstract: A method is disclosed for creating a low-cost, high-definition color conversion layer using the ink jet method, with the layer having a consistent thickness and not bleeding into adjacent subpixels. A color conversion filter (1000) is characterized by being formed with a bank layer (60) that has a plurality of gently-curved protrusions (63), each of which has a first portion (61) and a second portion (62).

Abstract: An organic EL device is disclosed in which the amount of dopant added is easily controlled, and which is able to achieve stable light emission that does not depend on the current density of electrical current passing through the device. The organic electroluminescent device includes a first electrode, an organic electroluminescent layer having a hole injecting and transporting layer, an organic emissive layer and an electron injecting and transporting layer, and a second electrode. The organic emissive layer has an inner layer interposed between two outer layers. The outer layers contact the hole injecting and transporting layer and the electron injecting and transporting layer, respectively. The two outer layers are composed of a host material and a first fluorescent dopant, and the inner layer is composed of a host material, a first fluorescent dopant and a second fluorescent dopant. The first fluorescent dopant has a larger bandgap than the second fluorescent dopant.

Abstract: A method of patterning a color conversion layer for an organic EL device is provided together with a method of manufacturing a multiple color emitting organic EL display using the patterning method. The patterning method includes forming the color conversion layer on a base having an organic layer and patterning the color conversion layer by carrying out a thermal cycle nano imprint technique.