Strong microcavity silicon-based organic light-emitting display device and forming method thereof

Abstract

The invention provides a strong micro-cavity silicon-based organic light-emitting display device, which comprises a monocrystalline silicon substrate. The monocrystalline silicon substrate comprises pixel regions and interval regions between the pixel regions. Reflecting electrodes are arranged in the pixel regions, and transparent electrodes are arranged on the reflecting electrodes. An insulation filling layer is arranged in the interval regions. A pixel definition layer is arranged on the insulation filling layer. The pixel definition layer further covers the edges of the transparent electrodes. An organic light-emitting layer is arranged on the pixel definition layer. A cathode layer is arranged on the organic light-emitting layer. The invention further provides a forming method of thestrong micro-cavity silicon-based organic light-emitting display device. According to the strong micro-cavity silicon-based organic light-emitting display device and the forming method thereof, the difference in the film forming time period of the pixel definition layer is reduced or eliminated, and the breakage is avoided. The thickness is uniform. The halo phenomenon caused by optical scattering unevenness caused by partial unevenness of the pixel definition layer on the edge of the transparent electrode is further reduced. The contrast ratio of the display device is improved.

Description

technical field [0001] The invention relates to the display field, in particular to a strong microcavity silicon-based organic light-emitting display device and a forming method thereof. Background technique [0002] Organic light-emitting display devices, ie, Organic Light-Emitting Diode (OLED) display devices, have been favored by industry insiders because of their thinness, power saving and many other incomparable advantages compared to liquid crystal display devices. The OLED display device is different from the traditional liquid crystal display device in that it does not need a backlight. It uses a very thin organic material coating on the substrate. When an electric current passes through, these organic materials will emit light. Moreover, the OLED display device can be made lighter and thinner, has a larger viewing angle, and can significantly save power. [0003] Among the technologies for enhancing brightness, there is a microcavity technology. A microcavity repr...

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Problems solved by technology

However, it is difficult to achieve different groove depths only by adjusting the exposure capability and exposure time, and the depth accuracy is difficult to control. The microcavity effect is weak and it is difficult to form a strong microcavity effect.

However, if the reflective electrodes and transparent electrode layers of different heights are directly fabricated on the insulating layer without passing through the trenches, the problem is that the height difference between the electrodes between different pixels is too large, which leads to the problem that the cathode is easy to break.

Furthermore, the height difference between the reflective electrode and the transparent electrode is large, which brings another problem that the pixel definition layer is difficult to make flat. When light passes through the uneven pixel definition layer, diffuse reflection will occur, resulting in a halo phenomenon. reduced contrast

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