Organic compound and organic electroluminescent device using same

Abstract

The invention discloses an organic compound and an organic photoelectric element using the organic compound, belonging to the to the field of organic photoelectricity. The molecular structural formulaof the organic compound is shown as a general formula (I) or a general formula (II) which is described in the specification. In the formulas, R is independently selected from the group consisting ofhydrogen, a deuterium atom, halogen, a C1-C12 alkyl group, a C1-C8 alkoxy group, a C2-C8 substituted or unsubstituted alkenyl group, a C2-C8 substituted or unsubstituted alkynyl group, a substituted or unsubstituted C6-C60 aryl group and a substituted or unsubstituted C2-C60 heteroaryl group; Ar1 and Ar2 are independently selected from the group consisting of a substituted or unsubstituted C6-C60aryl group and a substituted or unsubstituted C2-C60 heteroaryl group; and n is an integer in range of 0-7. The organic compound provided by the invention can effectively promote injection and transmission of electrons, balance hole and electron transfer in the photoelectric device, effectively improve the efficiency of the device and prolong the service life of the device.

Description

technical field [0001] The invention relates to an organic compound in the field of organic electroluminescence and an organic electroluminescence device using the compound. Background technique [0002] Organic electroluminescent devices (OLED: Organic Light Emission Diodes) have the advantages of wide viewing angle, fast response speed, high color quality, flexible light emission, etc., and have broad application prospects. OLED devices usually have a sandwich structure, including positive and negative electrode film layers and an organic functional material layer sandwiched between the electrode film layers. Apply voltage to the electrodes of the OLED device, positive charges are injected from the positive electrode, and negative charges are injected from the negative electrode. Under the action of the electric field, the positive and negative charges migrate in the organic layer and recombine to emit light. It has been widely used in display panels of new lighting fixtu...

AI Technical Summary

Problems solved by technology

2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) and 1,3,5-tris(N-phenyl-2-benzimidazole)benzene ( TPBI) is an electron transport / hole blocking material widely used in electroluminescent devices, but its stability in the device needs to be further improved

High stability green and red phosphorescent devices can be obtained by using BAlq; however, its higher HOMO energy level (-5.9eV) and lower triplet energy level (~2.18eV) are not conducive to obtaining high-efficiency green light Phosphorescent device; the luminous efficiency containing BAIq device is significantly lower (about 40%) than the luminous efficiency containing BCP (T.Watanabeetal., Proc.SPIE2001, 4105, 175) device

Therefore, although BAlq can achieve a good lifetime, it is not a satisfactory hole-blocking material in general due to the low efficiency of the fabricated devices

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