Chisso Corporation

Hitachi, Ltd.

Sharp Kabushiki Kaisha Corporation

Ntt Mobile Communications Network, Inc.

Kenji Furukawa

Kanetsugu Terashima

Mitsuyoshi Ichihashi

Makoto Kikuchi

Fusayuki Takeshita

Manabu Uchida

Takashi Inukai

Takenori Izumizawa

Shinichi Saito

Hiromichi Inoue

Takaharu Nakano

Hideo Saito

Shizuo Murata

Masami Tanaka

Ryuji Kobayashi

Naoyoshi Emoto

Shinichi Sawada

Shigehiro Yamaguchi

Toshihiro Koike

Hideo Sato

Shigeru Sugimori

Kouichi Kunimune

Minoru Nakayama

Itsuo Shimizu

Kohei Tamao

Wang Guofang

Hajime Yokoi

Fumiaki Funada

Shuichi Kozaki

Hiroshi Kobayashi

Akio Mukoh

Hiroshi Yamada

Toyoshiro Isoyama

Teruo Kitamura

Masato Isogai

Tetsuya Matsushita

Keiji Okada

Shintaroo Hattori

Yukiko Ichimura

Guofang Wang

Yasuki Nishi

Yoshihisa Ohno

Eiji Kodama

Masatoshi Kozaki

Shinichi Saitoh

Kishiroo Iwasaki

Kouhei Tamao

Yuichi Fujishita

A cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device are disclosed. Use of the cyclic tertiary amine compound as a hole transport material, a hole injection material or an organic electroluminescent material can provide organic EL devices having high luminous efficiency and a long service life.

Cyclic tertiary amine compound and organic electroluminescent device containing the compound

A charge transporting material, a light emitting material and an organic electroluminescent device having high efficiency using a specified diazapentacene derivative represented by the following general formula (1):(in the general formula (1), Rto Reach represents independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxy group, a substituted or not-substituted amino group, an aryl group or a heterocyclic group, in which the substituted or not-substituted aryl group or heterocyclic group, when they are adjacent with each other, may be of a structure condensed to each other, Xand Xeach represents independently an oxygen atom or a sulfur atom, and Yand Yeach represents independently a substituted or not-substituted alkyl group of 1 to 6 carbon atoms, an aryl group or a heterocyclic group).

Charge-transporting material containing diazapentacene derivative, luminescent material, and organic electroluminescent element employing these

Organic electroluminescent device

Use of an organic EL device comprising a dipyridylthiophene derivative represented by the following general formula (1) has made it possible to provide an organic EL device with high luminous efficiency at low voltage. Provided that in the formula, X is S or SO , R and R each independently represent a hydrogen atom, an alkyl group of 1-6 carbons, an alkenyl group of 2-6 carbons, an alkoxy group of 1-6 carbons, an aryloxy group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, with the proviso that when R and R each independently represent an alkenyl, alkoxy, aryl or heterocyclic group they may be bonded together but not into a benzo condensed ring, and A and A are independently a 2-pyridyl group or 3-pyridyl group

Organic electroluminescent device comprising dipyridylthiophene derivative

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

Organic electroluminescent device containing dithiafulvene derivative

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 transmission power control method in a mobile satellite communication system implementing accurate control of transmission power of a base station by obtaining an average received signal level at a mobile station at high accuracy. The mobile station measures an average received signal level Q.sub.k in a predetermined period (step SP2), and informs the base station of the average received signal level Q.sub.k and an actual measuring time T.sub.k (step SP3). The base station calculates a total measuring time t.sub.k which is the sum total of the actual measuring time T.sub.k (step SP16), a corrected average received signal level R.sub.k associated with the average received signal level during the total measuring time t.sub.k (step SP18), and a measuring error .DELTA.D.sub.k (step SP17), and controls the transmission power on the basis of these values (step SP21). Estimating the measuring error .DELTA.D.sub.k in the total measuring time t.sub.k longer than the individual actual measuring time T.sub.k makes it possible to reduce the measuring error, thereby implementing highly accurate transmission power control.

Mobile satellite communication system

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.

Copolymer, a process for producing the same and an electroluminescent

Growing community of inventors

Yokosuka, Japan

Kenji Furukawa