Fujifilm Corporation

Udc Ireland Limited

Yoshitaka Kitamura

Masayuki Mishima

Tatsuya Igarashi

Toshihiro Ise

Jiro Tsukahara

Masaru Kinoshita

Takayuki Fujiwara

Kazuki Yamazaki

Shun-ichi Ishikawa

Manabu Tobise

Atsushi Matsunaga

Sanpei Iida

An organic electroluminescent element having a small reduction rate in the luminance immediately after the start of light emission is provided. The organic electroluminescent element includes a substrate, a pair of electrodes including an anode and a cathode, disposed on the substrate, a light emitting layer disposed between the electrodes, and at least one organic layer disposed between the light emitting layer and the anode, in which at least one kind of a specific compound including a fluorene structure is contained in at least one organic layer between the light emitting layer and the anode, and at least one kind of a specific compound including a carbazole structure or a fluorene structure is contained as a light emitting material in the light emitting layer.

Organic electroluminescence element

The organic electroluminescent element of the present invention includes at least a pair of electrodes, at least one organic light-emitting layer between the pair of electrodes, and at least one lens A on a light-extracting surface of the pair of electrodes, wherein one of the pair of electrodes is a reflective electrode, and the other is a semi-transmissive/semi-reflective electrode, and wherein a real part nof a refractive index of the organic light-emitting layer and a real part nof a refractive index of the lens A satisfy the relationship n&#x3e;n, and the real part nis represented by Expression (1) described below:n&#x2266;nsin &#x3b8;&#x2003;&#x2003;Expression (1).

Organic electroluminescent element

To provide an organic electroluminescence element, containing: at least one pair of electrodes; at least one organic light-emitting layer disposed between the electrodes, the organic light-emitting layer comprising two phosphorescent light-emitting materials and a charge-transporting material, wherein the organic light-emitting element is a white organic light-emitting element, and the charge-transporting material is a hole-transporting material, and wherein one of the two phosphorescent light-emitting materials is a platinum complex expressed by the following general formula 1, and the other is an iridium complex expressed by any one of the following general formulae 2A to 2C: 

The invention provides an organic EL device including an anode, a cathode, and a luminescent portion positioned between the anode and cathode, the luminescent portion including two or more luminescent layers, each of the luminescent layers including plural primary luminescent layers that emit light of different colors, and each of the primary luminescent layers having a thickness of 5 nm or less.

Organic electroluminescence device and luminescence apparatus

An organic electroluminescence element including at least two light-emitting layers disposed between an anode and a cathode, wherein the at least two light-emitting layers include a light-emitting layer A that contains an electron transporting light-emitting material and a hole transporting host material, wherein a concentration of the electron transporting light-emitting material gradually increases from an anode side toward a cathode side of the light-emitting layer A, and a light-emitting layer B that contains a hole transporting light-emitting material and an electron transporting host material, wherein a concentration of the hole transporting light-emitting material gradually decreases from an anode side toward a cathode side of the light-emitting layer B. An organic EL element with high light-emission efficiency and excellent durability is provided.

The present invention provides an organic electroluminescent element that includes a pair of electrodes and a plurality of organic compound layers being disposed between the pair of electrodes. The organic compound layers include a luminescent layer containing a blue phosphorescent luminescent material and a host material having the lowest excited triplet energy (T) of 272 kJ/mol (65 kcal/mol) or more, and hole transport layers. One of the hole transport layers is a layer adjacent to the luminescent layer, and when the ionization potentials of the luminescent layer, the hole transport layer adjacent to the luminescent layer, and another of the hole transport layers, respectively, designated to Ip, Ipand Ip, the relationship Ip&#x3e;Ip&#x3e;Ipis satisfied.

Organic electroluminescent element including blue phosphorescent luminescent material

Disclosed is an organic electroluminescent device comprising a first electrode, a second electrode, at least one organic layer containing a luminescent layer and disposed between the first electrode and the second electrode, a transparent substrate and a prism structure disposed between the first electrode or the second electrode and the transparent substrate, wherein the prism structure is disposed such that the apexes of the prisms face the transparent substrate side and the coefficient of variation in the pitch of the apexes of the prisms is 1% or more.

Organic electroluminescent device comprising a prism structure

The present invention provides an organic electroluminescent element including an anode, a cathode, and a plurality of organic compound layers including at least one organic luminescent layer between the anode and the cathode, in which the organic luminescent layer contains a host material and two or more phosphorescent materials; the organic luminescent layer is adjacent to the organic compound layers at both an anode side and a cathode side thereof; the organic compound layer disposed adjacent to the organic luminescent layer at the anode side thereby has a thickness of 50 nm or less in thickness; and the organic compound layer disposed adjacent to organic luminescent layer at the cathode side thereby contains a compound having an ionization potential of 6.0 eV or less. The present invention also provides a display device using the organic electroluminescent element.

Organic electroluminescent element and display device using the same

The invention discloses an organic electroluminescent device having an anode, a cathode and a plurality of organic compound layers provided between the anode and the cathode and including a light-emitting layer, wherein the light-emitting layer contains two light-emitting materials including a phosphorescent light-emitting material, and a host material; and when three or more organic compound layers are provided between the light-emitting layer and the anode, and when the ionization potential of the light-emitting layer is Ipand the ionization potentials of the three or more organic compound layers are Ip, Ip, . . . , and Ipn in the order starting from the light-emitting layer, the formula (1): Ip&#x3e;Ip&#x3e;Ip&#x3e; . . . &#x3e;Ipn (n is an integer of 4 or more) is satisfied, or when three or more organic compound layers are provided between the light-emitting layer and the cathode, and when the electron affinity of the light-emitting layer is Eaand the electron affinities of the three or more organic compound layers are Ea, Ea, . . . , and Eam in the order starting from the light-emitting layer, the formula (2): Ea&#x3c;Ea&#x3c;Ea. . . &#x3c;Eam (m is an integer of 4 or more) is satisfied.

Organic electroluminescent device for improved luminous efficiency and chromaticity

The present invention provides a light emitting element comprising a pair of electrodes and one or more organic compound layers including a luminescent layer disposed between the pair of electrodes. In this structure, the luminescent layer includes at least one charge transport material and at least one light emitting material, and comprises a laminated structure having two or more laminates including a plurality of layers including the light emitting material in different concentrations.

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Kanagawa, Japan

Yoshitaka Kitamura