Tdk Corporation

Other

Tetsushi Inoue

Kenji Nakaya

Tetsuji Fujita

Junji Aotani

Masahiro Shinkai

Kenryo Namba

Hiroyuki Endo

Sumiko Kitagawa

Kensuke Ara

Michio Arai

Isamu Kobori

Emiko Kambe

Osamu Onitsuka

Akira Ebisawa

Kazutoshi Ohisa

Mitsufumi Codama

Suguru Takayama

Takakazu Yamamoto

Toshiki Aoi

Mutsuko Nakano

Satoshi Shirai

Yasuhiko Shirota

Takaki Kanbara

Sinichi Tezuka

Norihiro Okada

The organic EL element of the invention which achieves the aforementioned object is provided with a base, first and second electrode layers situated facing each other on one side of the base, and a luminescent layer situated between the electrode layers, wherein one of the first electrode layer and the second electrode layer is a hole injection electrode layer while the other is an electron injection electrode layer, an organic thin-film layer made of a vapor depositable polar organic compound with an energy gap of 3.5 eV or greater is provided between the luminescent layer and the electron injection electrode layer, and the organic thin-film layer has a thickness of 0.1 nm-4 nm.

Organic EL element and process for manufacture of organic EL element

Organic EL elements provided with a substrate, a first electrode layerand a second electrode layersituated in a mutually opposing manner on one side of the substrate, and a luminescent layersituated between the electrode layers, wherein one of the first electrode layerand the second electrode layeris a hole injection electrode layer and the other is an electron injection electrode layer, and there is formed in the luminescent layera modified sectionwhich contains an organic polymer compound different from the organic compound composing the luminescent layer, in bias toward the electron injection electrode layer.

Organic EL elements and process for fabrication thereof

The invention aims to provide a perylene derivative preparation process featuring satisfactory yields and improved preparation efficiency, a perylene derivative obtained by the process, and an organic EL device using the same. The object is achieved by a perylene derivative preparation process comprising subjecting to coupling reaction a 1,8-dihalogenated naphthalene derivative of the formula (1): wherein X is Cl, Br or I, Rto R, Rand Reach are hydrogen, alkyl, alkoxy, alkylthio, alkenyl, alkenyloxy, alkenylthio, aralkyl, aralkyloxy, aralkylthio, aryl, aryloxy, and arylthio radicals which may be substituted, amino radical, cyano radical, hydroxyl radical, &#x2014;COOMradical (wherein Mis hydrogen, alkyl, alkenyl, aralkyl or aryl), &#x2014;COMradical (wherein Mis hydrogen, alkyl, alkenyl, aralkyl, aryl or amino), or &#x2014;OCOMradical (wherein Mis alkyl, alkenyl, aralkyl or aryl), and at least two adjoining radicals selected from among Rto R, Rand Rmay bond or fuse together to form a substituted or unsubstituted carbocyclic aliphatic ring, aromatic ring or fused aromatic ring with the carbon atoms on which they substitute, with the proviso that when the carbocyclic aliphatic ring, aromatic ring or fused aromatic ring has substituent radicals, the substituent radicals are the same as Rto R, Rand R, to thereby synthesize a perylene derivative of the formula (2): wherein R' to R&#x2032;, R&#x2032; and R&#x2032; are as defined for Rto R, Rand Rin formula (1), and Rto R, Rand Rand R&#x2032; to R&#x2032;, R&#x2032; and R&#x2032; may be the same or different.

Perylene derivative synthesis process, perylene derivative and organic EL device

The invention aims to provide a perylene derivative preparation process featuring satisfactory yields and improved preparation efficiency, a perylene derivative obtained by the process, and an organic EL device using the same.

A compound for use in organic EL devices comprisingX&#x2014;Ywherein X is a compound of the formula and Y is a linking group and Rto Rand a to d are hydrogen, an alkyl group, an aryl group which may be substituted, an allyl group which may be substituted, a heterocyclic group which may be substituted, an amino group, or an arylamino group which may be substituted.

Compounds for use in organic EL devices and organic EL devices

An organic EL device comprising organic compound layers, at least one of which has a skeleton represented by formula (I): where Lis any one of o-, p-, and m-phenylene groups which have two, three or four rings and which may have a substituent with the proviso that when Lis a phenylene group having four rings, the phenylene group may have an unsubstituted or substituted aminophenyl group somewhere therein, R, R, Rand Rare each any one of the following groups: where R, R, R, R, R, Rand Rare each a substituted or unsubstituted aryl group, and r, r, rand rare each an integer of 0 to 5 with the proviso that r+r+r+r1, is less susceptible to physical changes, photochemical changes and electrochemical changes, and can emit light having various colors with high reliability and high light emission efficiency.

Organic EL device

In an organic EL device comprising organic layers between a pair of electrodes participating in at least a light emitting function, at least one organic layer contains an organic compound selected from naphthacene, tetraaryldiamine, anthracene and quinoxaline derivatives as a host material and an organic compound having a specific skeleton, typically diindeno&lsqb;1,2,3-cd:1&prime;,2&prime;,3&prime;-lm&rsqb;perylene derivative as a dopant. The device is capable of light emission to a satisfactory luminance, especially in a long wavelength region, and with a chromatic purity sufficient for use in full color displays, and had a sufficient durability to sustain such improved light emission performance over a long time.

In an organic EL device, a light emitting layer contains a specific coumarin derivative, and a hole injecting and/or transporting layer contains a specific tetraaryldiamine derivative. Also a light emitting layer in the form of a mix layer contains a specific coumarin derivative, a specific quinacridone compound or a specific styryl amine compound. There are provided at least two light emitting layers including a light emitting layer of the mix layer type wherein at least two dopants are contained so that at least two luminescent species may emit light. There is obtained an organic EL device capable of high luminance and continuous light emission and ensuring reliability. Multi-color light emission becomes possible.

The object of the present invention is to provide an organic EL device capable of preventing current leakage and maintaining a long lifetime, a high luminance, a high efficiency and a high display quality. The object can be achieved by an organic EL element comprising a hole injecting electrode, an electron injecting electrode and at least one organic layer placed between these electrodes, wherein the organic layer has a thickness of at least 100 nm and an electron- or hole-mobility of 0.5-5&times;10 cm /V.s.

Organic EL device and method for production thereof

Compound for use in organic EL device and organic EL device

Organic electroluminescent elements

Organic electroluminescent device

An organic EL element of the invention has an organic compound layer, especially a light emitting layer which contains a compound of the following general formula (I): (Ar),-L wherein Ar is an aromatic-bearing group, m is an integer of 2 to 6, the Ar groups may be the same or different, and L is a m-valent residue of a condensed polycyclic aromatic compound having 3 to 10 rings. Where L is a di- or trivalent residue derived from anthracene, at least one Ar is an aromatic residue derived from an alkynylarene. Where L is a tetravalent residue derived from naphthacene and Ar groups are attached at the 5-, 6-, 11- and 12-positions thereof, all the four Ar groups are not phenyl groups at the same time. The device of the invention sustains light emission of satisfactory luminance, especially at long wavelength for a long time.

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Tokyo, Japan

Tetsushi Inoue