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US 2026/0008745 A1Published application
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
AssigneeIdemitsu Kosan Co., Ltd.
InventorsTomoki KATO, Taro YAMAKI, Masahiro KAWAMURA, Hirokatsu ITO
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Abstract
A compound represented by formula (1) provides a high performance organic electroluminescence device and a novel material for realizing such an organic electroluminescence device: wherein R1 to R6, a to f, L1 to L3, and Ar are as defined in the description.
Claims15
1:
- An organic electroluminescence device, comprising a cathode, an anode, and an organic thin film layer comprising a light emitting layer positioned between the cathode and the anode, and a hole transporting layer positioned between the anode and the light emitting layer,
- wherein the hole transporting layer comprises a compound represented by formula (1):
- wherein:
- each of R1 to R6 is independently an alkyl group having 1 to 5 carbon atoms or an aryl group having 6 ring carbon atoms;
- a is an integer of 0 or 1,
- b is an integer of 0 or 1,
- c is an integer of 0 or 1,
- d is an integer of 0 or 1,
- e is an integer of 0 or 1,
- f is an integer of 0 or 1;
- adjacent two groups of R1 to R3 are not bonded to each other and do not form a ring structure;
- adjacent two groups of R4 to R6 are not bonded to each other and do not form a ring structure;
- Ar is represented by formula (g):
- * is a bond to L1 in formula (1);
- each R is independently an alkyl group having 1 to 5 carbon atoms or an aryl group having 6 ring carbon atoms;
- adjacent two Rs in each formula are not bonded to each other and do not form a ring structure;
- q is independently an integer of 0 or 1;
- r is independently an integer of 0 or 1;
- Ra and Rb is an unsubstituted aryl group having 6 ring carbon atoms or an aryl group having 6 carbon atoms substituted by an alkyl ground having 1 to 5 carbon atoms, and Ra and Rb are not bonded to each other to form a ring structure;
- each of L1 to L3 is independently a single bond or an arylene group represented by formula (ii):
- R is the same as defined with respect to formula (g);
- q is independently an integer of 0 or 1;
- when L1 is represented by formula (ii), one of * and ** is a bond to Ar in formula (1), and the other is a bond to the nitrogen atom in formula (1);
- when L2 is represented by formula (ii), one of * and ** is a bond to the phenanthrene structure in formula (1), and the other is a bond to the nitrogen atom in formula (1);
- and
- when L3 is represented by formula (ii), one of * and ** is a bond to the phenanthrene structure in formula (1), and the other is a bond to the nitrogen atom in formula (1).
23 more elements
2:
- The organic electroluminescence device according to claim 1, wherein in the compound of formula (1) at least one of L2 and L3 is a single bond.
3:
- The organic electroluminescence device according to claim 1, wherein formula (g) is bonded to L1 at the 2 or 4 position of the fluorene ring of formula (g).
4:
- The organic electroluminescence device according to claim 1, wherein the hole transporting layer comprises two or more layers, and the layer closest to the anode of the two or more layers comprises the compound.
5:
- The organic electroluminescence device according to claim 1, wherein the hole transporting layer comprises two or more layers, and the layer closest to the light emitting layer of the two or more layers comprises the compound.
6:
- The organic electroluminescence device according to claim 1, wherein the organic electroluminescence device comprises a hole injection layer between the anode and the transporting layer.
7:
- An electronic device, comprising the organic electroluminescence device according to claim 1.
8:
- A compound represented by any of the following formulae:
9:
- A material for organic electroluminescence devices which comprises the compound according to claim 8.
10:
- An organic electroluminescence device comprising a cathode, an anode, and an organic thin film layer disposed between the cathode and the anode, wherein the organic thin film layer comprises one or more layers, the organic thin film layer comprises a light emitting layer, and at least one layer of the organic thin film layer comprises the compound according to claim 8.
11:
- The organic electroluminescence device according to claim 10, wherein the organic electroluminescence device comprises a hole transporting layer between the anode and the light emitting layer, and the hole transporting layer comprises the compound.
12:
- The organic electroluminescence device according to claim 10, wherein the organic electroluminescence device comprises an anode-side organic thin film layer between the anode and the light emitting layer, the anode-side organic thin film layer comprises two or more layers, and at least one layer of the anode-side organic thin film layer comprises the compound.
13:
- The organic electroluminescence device according to claim 12, wherein the anode-side organic thin film layer comprising two or more layers comprises two or more hole transporting layers, and a hole transporting layer closest to the anode comprises the compound.
14:
- The organic electroluminescence device according to claim 12, wherein the anode-side organic thin film layer comprising two or more layers comprises two or more hole transporting layers, and a hole transporting layer closest to the light emitting layer comprises the compound.
15:
- An electronic device comprising the organic electroluminescence device according to claim 10.