Dai Nippon Printing Co., Ltd.

Eiji Otsuki

Toshihiko Takeda

Masato Okada

Shigehiro Ueno

Masaya Shimogawara

The present invention is to provide the following: a material for hole injection transport layers and a production method thereof, the material capable of forming a hole injection transport layer by the solution application method and increasing device lifetime; an ink for forming hole injection transport layers and a production method thereof, the ink capable of forming a hole injection transport layer by the solution application method and increasing device lifetime; and a long-life device and a production method thereof; wherein disclosed is a material for hole injection transport layers, which is a reaction product of a molybdenum complex with a compound represented by the following chemical formula (i): wherein R1, R2, X1 and X2 are as explained in the Description.

Material for hole injection transport layers, ink for forming hole injection transport layers, device, and production methods thereof

A main object of the present invention is to provide an organic EL element including an electron injection and transport layer containing an organic boron compound, which has excellent characteristics such as efficiency and service life. The present invention achieves the object mentioned above by providing an organic EL element including: an anode; a light emitting layer formed on the anode; an electron injection and transport layer that is formed on the light emitting layer, contains an organic boron compound, and has a crystalline structure; and a cathode formed on the electron injection and transport layer.

Organic electroluminescent element, method for manufacturing organic electroluminescent element, and coating liquid for electron injection and transport layer

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Tokyo-to, Japan

Eiji Otsuki