Korea Institute of Science and Technology

Shinwha Intertek Corporation

Hyun-Nam Cho

Sung Hyun Jung

Sang Won Son

Yong-in Lee

Jong-Hawk Kim

Young-Chul Kim

Seung-Eun Lee

Jong Sung Lim

Jae-Woong Yu

Youn-Woo Lee

Jong Bok Kim

Jai-Kyeong Kim

Seok Jin Park

O-Ok Park

Jae Hong Won

Seok-Jin Park

Young-Jae Hur

Tae-Woo Lee

Disclosed are compounds represented by formula (), wherein m, X, R, R, R, R', R&#x2032;, R&#x2032;, and Ar are described herein. The inventive cyclopentadienone compounds can be used as core materials for an organic electroluminescence element or other optical devices. The invention also describes methods for preparing compounds of formula ().

Compound derived from cyclopentadienone, preparation method thereof and EL element using the same

Organic white-light-emitting blend materials were prepared by light-doping method and electroluminescent devices fabricated using the same, including a transparent substance, translucent electrode, white-light-emitting layer and metal electrode in order, can efficiently control F&#xf6;rster energy transfer in organic light-emitting materials by performing light doping, thus to fabricate a white electroluminescent device using the blend materials which can emit white-light with high efficiency. The white-light-emitting blend materials can be obtained by the light-doping method, in which the energy transfer occurs only between a host which is a donor and each dopant which is an acceptor, while the energy transfers between dopants are efficiently blocked.

Methods of determining a composition ratio of an organic white-light-emitting blend material

The present invention relates to fluorene compounds and polymers thereof, having various structures and functional groups, and capable of being used as a luminescent material for organic and polymer-based electro-luminescence (EL) element and other optical element, and to an EL element using the same as a luminescent material.

Fluorene compounds containing various functional groups, polymers thereof and EL element using the same

Disclosed are a polyarylene compound and polymers thereof, which can be used as core materials for an organic or polymeric electro-luminescence (EL) element or for other optical devices, a preparation method thereof, and an EL element using the same.

Polyarylene compounds, polymers thereof, and electroluminescence element using the same

The present invention relates to a conductive polymer composition having PTC properties, that is, a PTC composition, and a PTC device comprised thereof, in particular, it relates to a PTC composition and a PTC device comprising thereof, wherein the PTC composition comprises: a) at least one crystalline thermoplastic olefin-based polymer and at least one rubber-based polymer resin containing unsaturated group; and b) conductive particles dispersed in a polymer matrix formed of component a). The PTC device comprising the PTC composition makes it possible to construct circuit protecting devices which can stably maintain their initial resistance value in spite of repeated current cycling by short-circuit.

PTC composition and PTC device comprising the same

The present invention relates to a conductive polymer composition which exhibits PTC characteristics (PTC composition) and a PTC device comprising it, wherein the PTC composition comprises: a) at least one crystalline olefin-based polymer and at least one ionomer; and, b) electrically conductive particles which have been dispersed in polymer matrix formed by a). The PTC composition according to the present invention has an enhanced adhesion to electrodes, which minimizes contact resistance and increases the maximum working current (hold current). The PTC device comprising the PTC composition can be used as a circuit protection device which protects circuit from overflowing and which holds initial resistance value although it is reused after multiple short circuit have taken place.

PTC composition and PTC device comprising it

A fluorene compound and polymers thereof having a polyphenylene group, and EL element comprising the same, which can be prepared through a Diels-Alder reaction of a compound having one or more cyclopentadienone group and a compound having one or more acetylene group and can be used as a core material for organic and polymeric EL element and/or other optical devices.

Fluorene compound, polymers thereof having a polyphenylene group, and EL element comprising the same

A pyrrole compound, polymers thereof and EL element using the same are disclosed. The pyrrole compound and polymers thereof can be used as a material for an organic and polymeric electroluminescence element and/or other optical devices such as an optical switch, sensor, module, waveguide, transistor, laser, light-absorbing body, dielectric substance, membrane and the like.

Pyrrole compounds, polymers thereof and EL element using the same

Disclosed is a method for preparing dimethyl dipropargylmalonate polymer containing exclusively six-membered ring structure by using supercritical or sub-critical carbon dioxide as a solvent with a transition metal chloride catalyst.

Growing community of inventors

Seoul, South Korea

Hyun-Nam Cho