The present invention relates to organic electroluminescent devices, the emitting layer thereof containing a blend of a luminescent material having a narrow singlet-triplet gap and a fluorescent emission material having high steric shielding.
ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
申请人:IDEMITSU KOSAN CO.,LTD.
公开号:US20220223798A1
公开(公告)日:2022-07-14
An organic electroluminescence device includes an anode, a cathode, and an emitting layer provided between the anode and the cathode, in which the emitting layer contains a delayed fluorescent compound M2 represented by a formula (2) and a compound M3 represented by a formula (3), and a singlet energy Si(M2) of the compound M2 and a singlet energy Si(M3) of the compound M3 satisfy a relationship of a numerical formula (Numerical Formula 1). In the formula (3), Y
31
to Y
36
are each independently CR
3
or a nitrogen atom, and two or more of Y
31
to Y
36
are each a nitrogen atom,
The present invention relates to organic electroluminescent devices which comprise mixtures of at least one matrix material of the formula (1) and an emitting material which has a small singlet-triplet separation.
The present invention relates to the fluorene derivatives and to organic electronic devices in which these Compounds are used as matrix material in the emitting layer and/or as hole transport material and/or as electron blocker or exciton blocker material and/or as electron transport material.
Binuclear and trinuclear metal complexes composed of two inter-linked tripodal hexadentate ligands for use in electroluminescent devices
申请人:Merck Patent GmbH
公开号:US10889604B2
公开(公告)日:2021-01-12
The present invention relates to bi- and trinuclear metal complexes and to electronic devices, in particular organic electroluminescent devices, containing these complexes.