Joled Inc.

Jdi Design and Development G. K.

Muneharu Sato

Shinichiro Ishino

Toshiyuki Akiyama

Mineki Hasegawa

Yasuhiro Sekimoto

Kosuke Mishima

Masakazu Takata

Koyo Sakamoto

Tomohiko Oda

Keiko Kurata

Tetsuro Kondoh

Takeshi Kamiya

An organic EL element including an anode, a first functional layer including organic material, disposed above the anode, a second functional layer including organic material, disposed on and in contact with the first functional layer, a light emitting layer disposed on and in contact with the second functional layer, and a cathode disposed above the light emitting layer. A highest occupied molecular orbital (HOMO) level of the organic material of the second functional layer has an energy level at least 0.2 eV lower than that of a HOMO level of the organic material of the first functional layer, and film thickness of the second functional layer is 15 nm or less.

Organic EL element, organic EL panel, and organic EL element manufacturing method

An organic electroluminescence element includes an anode, an organic light emitting layer disposed on an upper side of the anode, a first functional layer disposed over the organic light emitting layer and including NaF, a second functional layer disposed over the first functional layer and including an organic material containing Yb, and a cathode disposed on an upper side of the second functional layer. A method of manufacturing an organic electroluminescence element, includes forming an anode, forming an organic light emitting layer on an upper side of the anode, forming a first functional layer including NaF over the organic light emitting layer, forming a second functional layer including an organic material containing Yb over the first functional layer, and forming a cathode on an upper side of the second functional layer.

Organic EL element having one functional layer with NaF and the other functional layer with Yb

An organic electroluminescence element including an anode, a light-emitting layer, a functional layer, and a cathode stacked in this order. The light-emitting layer and the functional layer are in contact with each other. Hole mobility of the light-emitting layer is greater than electron mobility of the light-emitting layer. The electron mobility of the light-emitting layer is equal to or greater than an effective electron mobility of the functional layer. A highest occupied molecular orbital (HOMO) level of a first functional material included in the light-emitting layer is at least 0.4 eV greater than a HOMO level of a second functional material included in the functional layer.

Organic el element, and organic el display panel including light- emitting layer and functional layer with specific hole and electron mobilities relationship

Each of blue light emitting elements includes: a photoanode; a translucent cathode; an organic light emitting layer between the photoanode and the translucent cathode; a first functional layer between the organic light emitting layer and the photoanode; and a second functional layer between the organic light emitting layer and the translucent cathode, and has a resonator structure. The first functional layer has an optical film thickness of 48-62 nm. The translucent cathode is a stack of a first translucent conductive layer, a metal layer, and a second translucent conductive layer stacked in this order from the second functional layer side. The first translucent conductive layer has a refractivity of 2.0-2.4, and a film thickness of 85-97 nm. The metal layer has a refractivity different by 0 to 2.0 from that of the first translucent conductive layer, and has a film thickness of 2-22 nm.

Organic light emitting element with increased efficiency of extracting blue light

Growing community of inventors

Tokyo, Japan

Muneharu Sato