Compound, OLED display panel and electronic device
The present disclosure describes an electroluminescent material which is formed of a compound having a structure of Formula (I), an OLED display panel utilizing the compound and an electronic device having the OLED display panel. The OLED display panel includes a first electrode, a second electrode, and an organic thin film layer disposed between the first electrode and the second electrode. The organic thin film layer comprises an electron transport layer which comprises any one or a combination of at least two of the compounds. The electroluminescent material has a triplet energy level E T of ≥2.7 eV, a HOMO energy level of ≤−5.85 eV, and a glass transition temperature of >120° C. This compound improves luminous efficiency in the OLED display panel and the electronic device.
1. A compound, comprising a structure having Formula (I):
wherein R 1 , R 2 , R 3 and R 4 each is independently any one selected from a group consisting of a substituted or unsubstituted C6-C40 aromatic ring and a substituted or unsubstituted C5-C40 heteroaromatic ring;
wherein X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 and X 9 each is independently any one selected from a carbon atom or a nitrogen atom, and at least one of X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 and X 9 is a nitrogen atom;
wherein L m is each independently any one selected from a group consisting of
wherein Z r , Z x , Z a , Z b , Z y , Z u , Z o and Z v each is independently selected from a group consisting of a hydrogen atom, a substituted or unsubstituted C6-C30 aryl, a substituted or unsubstituted C6-C30 heteroaryl, a substituted or unsubstituted C6-C30 fused aryl, a substituted or unsubstituted C6-C30 fused heteroaryl, a substituted or unsubstituted C1-C16 alkylene, and a substituted or unsubstituted C1-C16 alkyleneoxy;
wherein p is an integer from 0 to 4, and r is an integer from 1 to p;
wherein q is an integer from 0 to 6, and x is an integer from 1 to q;
wherein s and t each is independently selected from an integer from 0 to 3, a is an integer from 1 to t, and b is an integer from 1 to s;
wherein g is an integer from 0 to 2, and y is an integer from 1 to g;
wherein c is an integer from 0 to 5, and u is an integer from 1 to c;
wherein d is an integer from 0 to 3, and o is an integer from 1 to d;
wherein e is an integer from 0 to 2, and v is an integer from 1 to e;
wherein a substituent is any one of a group consisting of a C1-C10 alkyl or cycloalkyl, a C2-C10 alkenyl, a C1-C6 alkoxy or thioalkoxy, a C6-C30 monocyclic aromatic hydrocarbon or fused aromatic hydrocarbon group, and a C3 to C30 monocyclic heteroaromatic hydrocarbon or fused heteroaromatic hydrocarbon group; and
wherein a dotted line indicates an attachment site;
wherein n is 1, and m is 1;
wherein A i is each independently any one selected from a group consisting of
wherein a dotted line indicates an attachment site; and
wherein j is an integer from 1 to 3.
2. The compound according to claim 1 , wherein at least one of X1, X2, X3, X7, X8 and X9 is a nitrogen atom.
3. The compound according to claim 1 , wherein two to six of X1, X2, X3, X4, X5, X6, X7, X8 and X9 are nitrogen atoms.
4. The compound according to claim 1 , wherein Lm is each independently any one selected from a group consisting of
wherein a dotted line indicates an attachment site.
5. The compound according to claim 1 , wherein R1 and R4 are the same, and R2 and R3 are the same.
6. The compound according to claim 1 , wherein j is 1.
7. The compound according to claim 1 , wherein the compound includes any one of the following compounds represented by structures HB44-HB45:
8. An OLED display panel comprising an organic thin film layer having one or more compound materials of Formula (I) of claim 1 , the OLED display panel further comprises a first and a second electrodes, wherein the organic thin film layer is disposed between the first electrode and the second electrode and wherein the organic thin film layer comprises an electron transport layer.
9. The OLED display panel according to claim 8 , wherein the organic thin film layer further comprises an electron injection layer, wherein a material of the electron injection layer comprises said one or more compounds in Formula (I).
10. The OLED display panel according to claim 8 , wherein the organic thin film layer further comprises a light-emitting layer, wherein the light-emitting layer includes said one or more compounds in Formula (I).
11. An electronic device comprising the OLED display panel according to claim 8 .