Organic electroluminescent element, and electronic apparatus
AssigneeIdemitsu Kosan Co., Ltd.
InventorsToshinari Ogiwara, Kei Yoshida, Masatoshi Saito, Yuichiro Kawamura
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Abstract
An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a delayed fluorescent first compound, a fluorescent second compound, and a third compound represented by Cz-Az. The second compound emits light with a main peak wavelength ranging from 430 nm to 540 nm. Az is a cyclic structure selected from the group consisting of a substituted or unsubstituted pyridine ring, a substituted or unsubstituted pyrimidine ring, a substituted or unsubstituted triazine ring, and a substituted or unsubstituted pyrazine ring. Cz is represented by a formula (3B) below.
Claims20
An organic electroluminescence device, comprising:
- an anode;
- an emitting layer;
- and
- a cathode,
- wherein:
- the emitting layer comprises:
- a delayed fluorescent first compound represented by formula (1):
- a fluorescent second compound;
- and
- a third compound represented by a formula (3A):
- Cz-Az (3A);
- the second compound emits light with a main peak wavelength ranging from 430 nm to 540 nm;
- A is a group with a moiety selected from formula (a-1) to (a-7):
- plural A moieties being the same or different and bonded together to form a saturated or unsaturated ring or forming no ring;
- B is a group with a moiety selected from formula (b-1) to (b-6) below
- R are each independently a hydrogen atom or a substituent, R as a substituent being selected from the group consisting of a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, and a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, plural R moieties being mutually the same or different and being bonded together to form a saturated or unsaturated ring or forming no ring;
- plural B moieties being mutually the same or different and being bonded together to form a saturated or unsaturated ring or forming no ring;
- a, b and d are each independently an integer of 1 to 5;
- c is an integer of 0 to 5;
- when c is 0, A and B are single-bonded or spiro-bonded to each other;
- and
- when c is an integer of 1 to 5, L is a linking group selected from the group consisting of a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms and a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, plural L being mutually the same or different and being bonded together to form a saturated or unsaturated ring or forming no ring;
- Az is a cyclic structure selected from the group consisting of a substituted or unsubstituted pyrimidine ring and a substituted or unsubstituted triazine ring;
- Cz is represented by a formula (a1), a formula (b1) or a formula (c) below:
- X31 to X38 and X41 to X48 are each independently C-Rx;
- Rx are each independently a hydrogen atom;
- Z31 is an oxygen atom or a sulfur atom;
- n is 1 or 2;
- and
- * represents a bonding site to a carbon atom in the cyclic structure represented by Az,
- wherein the organic electroluminescence device emits blue light and has an LT50 (hrs) of at least 6.
Dependencies are inferred from the claim text.