Joled Inc.

Hiroshi Katagiri

Takahiro Komatsu

Kosuke Mishima

Junko Tanaka

Noriyuki Matsusue

Yoshiyuki Ota

Masaki Aonuma

A display panel including a substrate, anodes disposed on or above the substrate, light-emitting layers disposed on or above the anodes, a first intermediate layer disposed on or above the light-emitting layers, a second intermediate layer disposed on the first intermediate layer, and a cathode disposed on or above the second intermediate layer. The first intermediate layer includes a fluoride of a first metal or a complex of the first metal. The second intermediate layer includes a second metal. The anodes are light-transmissive and the cathode is light-reflective, or the anodes are light-reflective and the cathode is light-transmissive. The first metal is selected from a group consisting of alkali metals and alkaline earth metals. The second metal is selected from rare earth metals.

Display panel utilizing self-luminous elements and method of manufacturing same

An organic electroluminescence (EL) element including an anode, a light-emitting layer above the anode, a first functional layer on and in contact with the light-emitting layer, a second functional layer on and in contact with the first functional layer, and a cathode above the second functional layer. A lowest unoccupied molecular orbital (LUMO) level of the first functional layer is lower than at least one of a LUMO level of the second functional layer and a Fermi level of a metal material included in the second functional layer.

Organic EL element and organic EL display panel

An organic electroluminescence (EL) element including an anode, a cathode opposing the anode, a light-emitting layer between the anode and the cathode, a hole transport layer in contact with the light-emitting layer, between the light-emitting layer and the anode, and an electron transport layer in contact with the light-emitting layer, between the light-emitting layer and the cathode. A difference between a lowest unoccupied molecular orbital (LUMO) level of an organic material included in the light-emitting layer and a LUMO level of an organic material included in the electron transport layer is greater than a difference between a highest occupied molecular orbital (HOMO) level of an organic material included in the hole transport layer and a HOMO level of the organic material included in the light-emitting layer.

Organic EL element

An organic EL element including an anode; a light-emitting layer above the anode; a first interlayer on the light-emitting layer, the first interlayer including a fluoride of a first metal that is an alkali metal or alkaline earth metal; a second interlayer on the first interlayer, the second interlayer including a second metal that has a property of cleaving a bond between the first metal and fluorine in the fluoride; a cathode on the second interlayer; and a sorption layer above the cathode, the sorption layer including a third metal that has a property of taking up and holding at least one of moisture and oxygen. A thickness Dof the first interlayer and a thickness Dof the second interlayer satisfy 5%&#x2264;D/D&#x2264;25%.

Organic EL element comprising first and second interlayers of specified materials and thicknesses, and method for manufacturing thereof

The present invention provides an organic light-emitting element with improved chemical stability at the interface between the light-emitting layer and the electron transport layer, which maintains excellent, stable luminous efficiency for a long period. For this purpose, one aspect of the present invention is an organic EL element having a substrate, and a hole injection layer, a buffer layer, a light-emitting layer, a regulation layer, an electron transport layer and a cathode which are sequentially layered on one side of the substrate. The regulation layer is made of NaF, which is not chemically reactive with the light-emitting layer or the electron transport layer, and the electron transport layer is made of a CT complex using a host material and an n-type dopant, which are both organic materials.

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Tokyo, Japan

Hiroshi Katagiri