Sharp Kabushiki Kaisha Corporation

Fuji Electric Holdings Co., Ltd.

Toshio Hama

Koji Kawaguchi

Makoto Kobayashi

Naoyuki Kanai

Kenya Sakurai

Yuko Nakamata

Masaru Nagai

Chong Li

Yutaka Terao

A color conversion film 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. Such an organic electroluminescent device may include as well a pair of electrodes at least one of which is a transparent electrode, and an organic electroluminescent layer sandwiched between the electrodes.

Color conversion film and multicolor-emitting, organic electroluminescent device comprising the color conversion film

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.

An organic light emitting element includes a pair of electrodes at least one of which has visible light transmittance; and an organic EL layer provided between the pair of electrodes. The organic EL layer includes at least an organic light emitting layer that emits light when a voltage is applied between the pair of electrodes. The organic light emitting layer includes an electron transport host material; and at least first and second guest materials. Each of the first and second guest materials has an emission peak in a blue to blue-green color region. The electron transport host material has an ionization potential (IPH) and an electron affinity (AFH), and the first guest material has an ionization potential (IPG1) and an electron affinity (AFG1) that satisfy Expression (1): IPH&#x2266;IPG1 and AFH&#x3c;AFG1 (1). The organic light emitting element has significantly improved efficiency without any influence on driving voltage.

Organic light emitting element

An organic EL device is disclosed that prevents degradation due to moisture and oxygen and that avoids the generation of dark spots even when a substrate covered with polymer or made of a resin is used. The organic EL device includes a substrate, a transparent electrode consisting of a plurality of electrode elements formed on the substrate, an organic EL layer formed on the transparent electrode, and a reflection electrode formed on the organic EL layer. The transparent electrode includes first and second transparent electrode elements. Each of the first transparent electrode elements is arranged alternately with each of the second transparent electrode elements. A side edge portion of each of the first transparent electrode elements overlaps a side edge portion of next second transparent electrode element through an insulation layer. The first transparent electrode elements are electrically insulated from the second transparent electrode elements.

Organic electroluminescent device with improved moisture protection

A color-converting-function-possessing color filter and a method for its manufacture are disclosed. A simplified manufacturing process is provided that makes possible highly detailed patterning. The method of manufacturing the color-converting filter comprises a step of forming color filter layers on a transparent substrate, a step of forming a colorant layer containing a color-converting colorant on the color filter layers, and a step of exposing the colorant layer via the transparent substrate and the color filter layers using colorant-decomposing light, thus forming color-converting layers in positions corresponding to the color filter layers. In usage, a layered body consists of a transparent substrate, color filter layers and a colorant layer as a color-converting-function-possessing filter.

Growing community of inventors

Matsumoto, Japan

Toshio Hama