Organic compound based on triazine and benzoxazole and application thereof in organic electroluminescent device
Disclosed are an organic compound based on triazine and benzoxazole and an application thereof in an OLED device. The compound of the present application has a relatively high glass transition temperature and molecular thermal stability, is low in absorption and high in refractive index in the field of visible light, and is capable of effectively improving the light extraction efficiency of an OLED device when applied to a capping layer of the OLED device; with a deep HOMO energy level and high electronic mobility, the compound of the present application can be used as the hole blocking layer or the electron transport layer material, so that the recombination degree of the hole and the electron in the light-emitting layer can be improved, and thus the light-emitting efficiency of the OLED device can be enhanced and the service life of the OLED device can be prolonged.
1. An organic electroluminescent device comprising a capping layer, wherein the capping layer comprises an organic compound based on triazine and benzoxazole, and wherein a structure of the organic compound is represented by the following formula (1):
wherein, x represents 1 or 2; z represents 1 or 2; m and n independently represent 0, 1 or 2; and m+n+z=3;
In the formula (1), Ar 1 , Ar 2 , and Ar 3 each independently represent substituted or unsubstituted arylene with 6 to 60 carbon atoms or substituted or unsubstituted 5 to 60-membered heteroarylene with one or more heteroatoms; the heteroatom is nitrogen atom, oxygen atom or sulfur atom; Ar 1 , Ar 2 , and Ar 3 each further independently represent a single bond; Ar 1 , Ar 2 , and Ar 3 are identical or different;
R 1 represents hydrogen atom, substituted or unsubstituted aryl with 6 to 60 carbon atoms, substituted or unsubstituted 5 to 60-membered heteroary with one or more heteroatoms, or
the heteroatom is nitrogen atom, oxygen atom, or sulfur atom;
Q 1 and Q 2 each independently represent substituted or unsubstituted aryl with 6 to 60 carbon atoms, or substituted or unsubstituted 5 to 60-membered heteroary with one or more heteroatoms; the heteroatom is nitrogen atom, oxygen atom, or sulfur atom;
R 2 represents a structure represented by the following formula (2) or formula (3):
R 3 represents a structure represented by the following formula (4) or formula (5):
wherein Ar 4 , Ar 5 , Ar 6 , Ar 7 , Ar 8 , Ar 9 , Ar 10 and Ar 11 each independently represent hydrogen atom, substituted or unsubstituted aryl with 6 to 60 carbon atom, linear or branched alkyl with 1 to 10 carbon atoms, or substituted or unsubstituted 5- to 60-membered heteroary with one or more heteroatoms; the heteroatom is nitrogen atom, oxygen atom, or sulfur atom.
2. The organic electroluminescent device according to claim 1 , wherein Ar 1 , Ar 2 , and Ar 3 each independently represent phenylene substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritiutn atoms, linear or branched alkyl with 1 to 10 carbon atoms; naphthylene substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, or linear or branched alkyl with 1 to 10 carbon atoms; biphenylene substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, or linear or branched alkyl with 1 to 10 carbon atoms; pyridinylene substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, or linear or branched alkyl with 1 to 10 carbon atoms; carbazolylene; furanylene; pyrimidinylene; pyrazinylene; pyridazinylene; dibenzofuranylene; 9,9-ditnethylfluorenylene, or N-phenylcarbazolylene; quinolylene; or isoquinolylene or naphthyridinylene; R 1 , Ar 4 , Ar 5 , Ar 6 , Ar 7 , Ar 8 , Ar 9 , Ar 10 , Ar 11 and Q 1 and Q 2 each independently represent phenyl substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, linear or branched alkyl with 1 to 10 carbon atoms; naphthyl substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, linear or branched alkyl with 1 to 10 carbon atoms; biphenyl substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, linear or branched alkyl with 1 to 10 carbon atoms; pyridinyl substituted or unsubstituted by halogen atoms, protium atoms, deuterium atoms, tritium atoms, linear or branched alkyl with 1 to 10 carbon atoms; carbazolyl; furanyl; pyrimidinyl; pyrazinyl; pyridazinyl; dibenzofuranyl; 9,9-dimethylfluorenyl; N-phenylcarbazolyl; quinolinyl; or isoquinolinyl or naphthyridinyl.
3. The organic electroluminescent device according to claim 1 , wherein, when z represents 1, —Ar 1 —(R 1 ) x contains at least one heteroatom, and the heteroatom is nitrogen atom, oxygen atom, or sulfur atom.
4. The organic electroluminescent device according to claim 1 , wherein the structure of the organic compound is represented as any one of the following formulas (I)-(VII):
5. The organic electroluminescent device according to claim 1 , wherein R 1 in formula (1) represents any one of:
6. The organic electroluminescent device according to claim 1 , wherein a particular structural formula of the organic compound is any one of:
7. The organic electroluminescent device according to claim 1 , wherein the organic electroluminescent device comprises at least one functional layer comprising the organic compound based on triazine and benzoxazole.
8. The organic electroluminescent device according to claim 7 , wherein the organic electroluminescent device comprises a hole block layer or an electron transport layer comprising the organic compound based on triazine and benzoxazole.
9. The organic electroluminescent device according to claim 7 , wherein a particular structural formula of the organic compound is any one of:
10. The organic electroluminescent device according to claim 9 , wherein the organic electroluminescent device comprises a hole block layer or an electron transport layer comprising the organic compound based on triazine and benzoxazole.