Chisso Corporation

Takenori Izumizawa

Kenji Furukawa

Manabu Uchida

Shigehiro Yamaguchi

Toshihiro Koike

Kohei Tamao

Takaharu Nakano

Kouhei Tamao

Organic electroluminescent device

An organic EL device having an organic EL structure which moisture does not enter and maintaining stable luminescence characteristics for a long period of time. An anode ( ), and organic substance layer ( ), and a cathode ( ) are formed on a transparent substrate ( ). A combination (insulating layer-moisture reaction layer combination) including an insulating layer ( ) and a moisture reaction layer ( ) formed on the insulating layer ( ) covers an organic EL structure including the organic substance layer, the cathode, and a portion of the anode. The material of the moisture reaction layer ( ) is a metal having a Pauling's electronegativity of less than 1.2. There are large differences in the number of dark spots produced and the growth of the dark spots between a metal; e.g., Ca (1.0), whose electronegativity is less than 1.2 and a metal; e.g., Mg (1.2), whose electronegativity is 1.2.

Organic el device

An organic electroluminescent device contains a specific amine derivative represented by formula (1) as a hole-transportation material or light-emitting material, to thereby produce an organic EL device of high efficacy and prolonged service life.

Amine derivative and organic electroluminescent device using the same

Diaminonaphthalene derivative and organic electroluminescent device using the same

Silole derivatives and organic electroluminescent element containing the same

A red emitting material consisting of porphyrin, wherein the fluorescence of porphyrin is utilized. Metalloporphyrin can also be used as the porphyrin. An organic electroluminescent element having a porphyrin containing light emitting. The porphyrin content in the light emitting layer may be 1.0% by weight or more. The light emitting layer functions as a hole injection and transport layer or an electron injection and transport layer. Alternatively, it may be possible to further provide a hole injection and transport layer or an electron injection and transport layer.

Red-emitting material and organic electroluminescent device made by using the same

An electroluminescence element (EL) obtained by using a silacyclopentadiene derivation expressed by the general formula (I) and the derivative are provided. ##STR1## (wherein X and Y are independently hydrocarbon radicals with from 1 to 6 atoms and R.sub.1 to R.sub.4 are hydrogen, halogens, alkyl radicals with from 1 to 6 carbon atoms, or a condensed (un)substituted ring if being adjacent).

Silacyclopentadiene derivatives and an organic electroluminescent

An electroluminescence element (EL) obtained by using a silacyclopentadiene. derivation expressed by the general formula (I) and the derivative are provided. ##STR1## (wherein X and Y are independently hydrocarbon radicals with from 1 to 6 atoms and R.sub.1 to R.sub.4 are hydrogen, halogens, alkyl radicals with from 1 to 6 carbon atoms, or a condensed (un)substituted ring if being adjacent).

A novel copolymer affording a highly efficient electroluminescent element by the use of which the movement of electric charge occurs very efficiently and a full color luminescence is possible, a process for producing the same and an electroluminescent element, are provided, which copolymer is prepared by copolymerizing N-vinylcarbazole as an electron-transporting compound with a specified cumarin derivative as a luminescent compound; which process comprises copolymerizing a specified quantity of a specified cumarin derivative with a specified quantity of N-vinylcarbazole in the presence of a polymerization initiator or a catalyst; and which electroluminescent element is prepared by using a thin film obtained from the copolymer.

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Kanagawa, Japan

Takenori Izumizawa