ORGANIC ELECTROLUMINESCENCE ELEMENT, ELECTRONIC APPARATUS, AND PRODUCTION METHOD FOR ORGANIC ELECTROLUMINESCENCE ELEMENT

WIPO Patent Application WO/2022/191234

A1

An organic EL element (1) that has a positive electrode (3), a negative electrode (4), and a light emission layer that is arranged between the positive electrode (3) and the negative electrode (4). The light emission layer includes a first light emission layer (51) and a second light emission layer (52). The first light emission layer (51) includes a first host material and a first light-emitting compound. The second light emission layer (52) includes a second host material and a second light-emitting compound. The first host material and the second host material are different. The first light-emitting compound and the second light-emitting compound are the same or different. The triplet energy T1 (H1) of the first host material and the triplet energy T1 (H2) of the second host material satisfy expression 1. The diffusion coefficient D1 of the triplet energy 1 (H1) of the first host material as calculated from the diffusion equation is at least 3.0×10-9 (cm2/s).　Expression 1: T1 (H1)>T1 (H2).

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KISHINO KENGO (JP)
TASAKI SATOMI (JP)
NISHIMURA KAZUKI (JP)
TAKAHASHI YOSHIAKI (JP)

PCT/JP2022/010266

September 15, 2022

March 09, 2022

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IDEMITSU KOSAN CO (JP)

H05B33/10; H01L51/50; H05B33/12

WO2011155508A1	2011-12-15
WO2014087913A1	2014-06-12
WO2012153603A1	2012-11-15
WO2012137640A1	2012-10-11
WO2021049651A1	2021-03-18

JP2019161218A	2019-09-19
KR20200011527A	2020-02-03

KINOSHITA & ASSOCIATES (JP)

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