Electron transport material and application thereof
View Patent ↗The present disclosure relates to an electron transport material and an application thereof. According to the electron transport material, a structure of a molecular is designed and selected to be constructed by a group having a high carrier mobility, such that the molecule has a higher carrier mobility. In addition, a core group of the molecule is a structure based on mesitylene triazine. The molecular rigidity of the structure is strong, and the intermolecular stacking can be effectively inhibited, such that the material has a lower refractive index, and the surface plasma polariton loss of an organic light-emitting device can be effectively suppressed. The forward light-emitting efficiency of the light-emitting device can be improved by more than 14% by applying the electron transport material to the device.
1. An electron transport material, comprising:
a compound represented by a general formula I,
wherein, R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the following groups represented by formulas 1-3 to 1-16, and R 1-1 and R 1-2 are not simultaneously hydrogen, R 2-1 and R 2-2 are not simultaneously hydrogen, and R 3-1 and R 3-2 are not simultaneously hydrogen,
wherein, * denotes the binding sites of the R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 with a benzene ring on the compound represented by the general formula I.
2. The electron transport material according to claim 1 , wherein R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the groups represented by formulas 1-9 to 1-11.
3. The electron transport material according to claim 1 , wherein R 1-1 or R 1-2 is hydrogen, R 2-1 or R 2-2 is hydrogen, and R 3-1 or R 3-2 is hydrogen.
4. The electron transport material according to claim 1 , wherein the compound represented by the general formula I is selected from one of compounds 1 to 10:
5. The electron transport material according to claim 4 , wherein the compound represented by the general formula I is selected from compound 1, compound 4 or compound 7.
6. A semiconductor device, comprising an electron transport material, and the electron transport material comprises a compound represented by a general formula I,
wherein, R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the following groups represented by formulas 1-3 to 1-16, and R 1-1 and R 1-2 are not simultaneously hydrogen, R 2-1 and R 2-2 are not simultaneously hydrogen, and R 3-1 and R 3-2 are not simultaneously hydrogen,
wherein, * denotes the binding sites of the R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 with a benzene ring on the compound represented by the general formula I.
7. The semiconductor device according to claim 6 , wherein R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the groups represented by formulas 1-9 to 1-11.
8. The semiconductor device according to claim 6 , wherein R 1-1 or R 1-2 is hydrogen, R 2-1 or R 2-2 is hydrogen, and R 3-1 or R 3-2 is hydrogen.
9. The semiconductor device according to claim 6 , wherein the compound represented by the general formula I is selected from one of compounds 1 to 10:
10. The semiconductor device according to claim 9 , wherein the compound represented by the general formula I is selected from compound 1, compound 4 or compound 7.
11. The semiconductor device according to claim 6 , wherein the semiconductor device is an organic light-emitting diode, a quantum dot light-emitting diode, an organic photovoltaic cell or an organic light-emitting field-effect transistor.
12. A display device having an organic light-emitting diode and/or a quantum dot light-emitting diode, wherein an electronic transport layer material of the organic light-emitting diode and/or the quantum dot light-emitting diode comprises a compound represented by a general formula I,
wherein, R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the following groups represented by formulas 1-3 to 1-16, and R 1-1 and R 1-2 are not simultaneously hydrogen, R 2-1 and R 2-2 are not simultaneously hydrogen, and R 3-1 and R 3-2 are not simultaneously hydrogen,
wherein, * denotes the binding sites of R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 with a benzene ring on the compound represented by the general formula I.
13. The display device according to claim 12 , wherein the compound represented by the general formula I is selected from one of compounds 1 to 10:
14. The display device according to claim 13 , wherein the compound represented by the general formula I is selected from compound 1, compound 4 or compound 7.
15. The display device according to claim 12 , wherein the display device is a bottom emitting type display panel.
16. The electron transport material according to claim 1 , wherein R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the groups represented by formulas 1-3 and 1-7 to 1-16.
17. The electron transport material according to claim 1 , wherein R 1-1 , R 1-2 , R 2-1 , R 2-2 , R 3-1 and R 3-2 are each independently selected from hydrogen and one of the groups represented by formulas 1-9 to 1-12 and 1-15 to 1-16.