ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE

WIPO Patent Application WO/2023/243563

A1

A light-emitting zone (5) in this organic EL element (1) contains a first light-emitting layer (51) containing a first host material and a second light-emitting layer (52) containing a second host material. The first host material is a first compound as represented by general formula (1), and the first host material and the second host material are different from each other. With reference to the first light-emitting layer (51) and the second light-emitting layer (52), the film thickness ratio TCA/TAN is 0.3 to 1.5, where TAN is the film thickness of the layer disposed on the anode (3) side and TCA is the film thickness of the layer disposed on the cathode (4) side. The organic EL element (1) comprises at least one of the structures (i) and (ii).　structure (i): The anode (3) is a light-reflective electrode that exhibits light reflectivity, and the cathode (4) is a light-transmissive electrode that exhibits light transmissivity.　structure (ii): A color conversion region is disposed on the light extraction side of the organic EL element (1).

KUDO YU (JP)
BAN SHINTARO (JP)
YOSHIDA KEI (JP)
HASHIMOTO SIGMA (JP)
SHIRASAKI YOSHINAO (JP)

PCT/JP2023/021577

December 21, 2023

June 09, 2023

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IDEMITSU KOSAN CO (JP)

H10K50/13; C09K11/06; G02B5/20; H05B33/12; H05B33/26; H05B33/28; H10K50/10; H10K50/12; H10K50/125; H10K50/15; H10K50/16; H10K50/828; H10K85/30; H10K85/60; H10K50/818; H10K102/10; H10K102/20

WO2022114156A1

2022-06-02

JP2019161218A	2019-09-19
CN106565705A	2017-04-19

KINOSHITA & ASSOCIATES (JP)

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