Ricoh Company, Ltd.

Hodogaya Chemical Co., Ltd.

Rohm Co., Ltd.

Hitachi, Ltd.

Sanyo Electric Co., Ltd.

Pioneer Corporation

Mitsubishi Chemical Corporation

Kyoto University

Nippon Kayaku Kabushiki Kaisha

Optc Co., Ltd.

Chihaya Adachi

Kazukiyo Nagai

Nozomu Tamoto

Masaomi Sasaki

Tomoyuki Shimada

Chiaki Tanaka

Mitsutoshi Anzai

Akira Katayama

Yohta Sakon

Akihiro Imai

Katsuhiro Morooka

Masafumi Ohta

Toshihiko Takahashi

Shogo Saito

Hiroshi Tamura

Tetsuro Suzuki

Tetsuo Tsutsui

Kouji Kishida

Takashi Okada

Shinichi Kawamura

Mitsuru Hashimoto

Haruo Tanaka

Masaaki Ikeda

Toshiya Sagisaka

Yuji Hamada

Masafumi Torii

Yoshio Taniguchi

Teruyuki Ohnuma

Takahito Oyamada

Takaaki Kurata

Toshiki Koyama

Tetsuo Tsutui

Yuuichiroh Kawamura

Kenji Muneuchi

Teppei Tsuchida

Michifumi Nagawa

A 3,6-diphenylcarbazole compound, which has a specific formula and realizes an organic electroluminescent device having high durability and high luminous efficiency. An electroluminescent device which includes an anode; a cathode which faces the anode; and at least one layer including a luminescent layer, optionally a hole transporting layer and an electron transporting layer, which is located between the anode and the cathode, wherein the at least one layer includes the 3,6-diphenylcarbazole compound.

3, 6-diphenylcarbazole compound and organic electroluminescent device

An organic semiconductor device includes organic semiconductor layers () and an electron injecting electrode () which is composed of MgAu alloy and injects electrons into the organic semiconductor layers (). The MgAu alloy forming the electron injecting electrode () may contain not more than 85 atom % of Au. The organic semiconductor device may further include a hole injecting electrode () for injecting holes into the organic semiconductor layers (). The electron injecting electrode and the hole injecting electrode are arranged apart from each other in such a manner that they fit to each other. The organic semiconductor device may further include a gate electrode which is arranged opposite, via an insulating film, to the region between the electron injecting electrode and the hole injecting electrode.

Organic semiconductor device and method for manufacturing same

The device according to the invention is a device having organic thin films containing a light-emitting layer between an anode and a cathode that emits light by application of electric energy, characterized in that the light-emitting device contains at least a compound having the basic skeleton represented by the following General Formula (1) or (2). Use of the condensed polycyclic compound according to the invention allows production of high-brightness, high-efficiency light-emitting device superior in color purity.

Light-emitting device, condensed polycyclic compound used therein and method for producing same

A sheet-like display medium includes a switching layer containing a switching material having a light absorption spectrum which changes in a visible light range when a voltage no less than a threshold value is applied while also maintaining the changed light absorption spectrum even after the voltage application is interrupted, and an electrode layer laminated on the switching layer. The switching material may be an organic metal complex such as Cu-TCNQ or Ag-TCNQ.

Sheet-like display medium including switching layer, and display element and device utilizing the same

Organic semiconductor laser device

An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III):

Electrophotographic photoconductor and aromatic polycarbonate resin for use therein

An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.

Electrophotographic photoconductor and aromatic polycarbonate resin for

An aromatic polycarbonate containing a structural unit of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, Ar.sup.1 is a substituted or unsubstituted aryl group and Ar.sup.2 and Ar.sup.3 are independently a substituted or unsubstituted arylene group. The aromatic polycarbonate is capable of transferring charges and is used for forming a photosensitive layer of an electrophotographic photosensitive medium.

Aromatic polycarbonate and electrophotographic photosensitive medium

An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): wherein Ar.sup.1 to Ar.sup.5, X, n, k and j are as specified in the specification.

An organic electroluminescent element having an anode, a cathode, and an organic compound layer provided between the electrodes, the organic compound layer containing an oxadiazole compound of formula (I) or (II): ##STR1## wherein A.sup.1 to A.sup.6 are each an aromatic hydrocarbon group or an aromatic heterocyclic group which may have a substituent; X is a hydrogen atom or a fluorine atom; R.sup.1 and R.sup.2 are each a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent, or an alkoxyl group which may have a substituent; and R.sup.3, R.sup.4 and R.sup.5 are each a hydrogen atom, a halogen atom, an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, or hydroxyl group.

Organic electroluminescent element

An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formula (II) and formula (III): ##STR1## wherein n, Ar.sup.1, Ar.sup.2, Ar.sup.3, R.sup.1, R.sup.2 and X are as specified in the specification, ##STR2## wherein k and j are also as specified in the specification.

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Numazu, Japan

Chihaya Adachi