an organic light emitting diode

Abstract

The invention discloses an organic light emitting diode. The organic light emitting diode comprises the following structures from bottom to top: a substrate, an anode electrode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, and an electron injection layer. layer, cathode electrode.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, in particular to an organic light-emitting diode (OLED) with uniform light emission. Background technique [0002] OLED display technology has the characteristics of self-illumination, using very thin organic material coating and glass substrate, these organic materials will emit light when current passes through, and OLED display screen has a large viewing angle, and can significantly save power, and Its manufacturing method is simple, low power consumption, rich colors, suitable for flexible substrates and large-area display, etc., has attracted the attention of the industry, so it has always been favored by the industry. [0003] The two electrodes of the OLED are the cathode electrode and the anode electrode. In order to increase the luminous efficiency of the device, the injection of electrons and holes at the cathode electrode usually requires a low work function; while at the anode ...

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Problems solved by technology

[0005] However, although the above two methods can improve the work function of the anode electrode to a certain extent, there are still problems

Oxygen plasma treatment can clean the organic impurities on the ITO surface, increase the terminal oxygen content on the ITO surface, and then enhance the surface polarization, thereby improving the work function of the ITO surface, but the bombardment of the oxygen plasma on the ITO surface will cause the surface smoothness to decrease, which must be To some extent offset the effect of the increase in the work function

UV / ozone treatment does not actually increase the work function of the ITO surface, it actually only cleans the organic impurities on the ITO surface, and the removal of organic impurities has a very limited effect on improving the work function

In the process of anode electrode deposition, oxygen or water vapor or a mixture of the two is introduced, and the process cycle is long, which is not conducive to improving production efficiency.

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