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US 12,435,269 B2Granted
Organic electroluminescent element and electronic appliance
AssigneeIdemitsu Kosan Co., Ltd.
InventorsTakushi Shiomi, Keiichi Yasukawa, Hiromi Nakano, Toshinari Ogiwara
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Abstract
An organic electroluminescence device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode. The emitting layer comprises a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom. A singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy the relationship S1(M3)>S1(M2).
Claims26
An organic electroluminescence device comprising:
- an anode;
- a cathode;
- and
- an emitting layer disposed between the anode and the cathode,
- wherein the emitting layer comprises;
- a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom, and
- a singlet energy S1 (M2) of the compound M2 and a singlet energy S1 (M3) of the compound M3 satisfy a relationship of a numerical formula (Numerical Formula 1) below, S1 (M3) >S1 (M2) [ . . . ] (Numerical Formula 1).
4 more elements
Dependencies are inferred from the claim text.