OLED device manufacturing method

Abstract

The invention discloses an OLED device manufacturing method. The method includes the steps that a hole injection layer and a hole transmission layer are manufactured on an OLED anode through an OPEN MASK in an evaporation mode; a B primary-color organic light-emitting layer is manufactured on the hole transmission layer through the OPEN MASK in an evaporation mode, and the B primary-color organic light-emitting layer is doped with a hole transmission layer material; a G primary-color organic light-emitting layer is manufactured on part of areas of the B primary-color organic light-emitting layer through a FINE MASK in an evaporation mode, and the G primary-color organic light-emitting layer is doped with an electronic blocking EBL material; an R primary-color organic light-emitting layer is manufactured on part of areas of the B primary-color organic light-emitting layer through a FINE MASK in an evaporation mode, the R primary-color organic light-emitting layer is doped with an electronic blocking EBL material, and the R primary-color organic light-emitting layer is thicker than the G primary-color organic light-emitting layer. According to a conventional technology, an electron transfer layer, an electron injection layer, a cathode and a packaging layer are arranged on the B primary-color organic light-emitting layer, the G primary-color organic light-emitting layer and the R primary-color organic light-emitting layer in an evaporation mode. Due to the application of the technical scheme, when the cavity length of three primary colors is adjusted, it is avoided that a plurality of FINE MASKs are used, the yield of OLED devices is increased, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of semiconductor device preparation, in particular to a method for preparing an OLED device. Background technique [0002] Organic Light-Emitting Diode (OLED, Organic Light-Emitting Diode) has the characteristics of self-illumination, and is recognized by the industry as a successor to liquid crystal displays ( The third generation display technology after LCD, Liquid Crystal Display). OLED realizes the display through organic light-emitting materials that emit light under the drive of current. The principle is to insert functional layers between the anode and cathode, including charge injection layer, charge transport layer and light-emitting layer, and apply an appropriate voltage between the electrodes , the device can emit light. [0003] The pixel arrangement of an OLED device is generally such that R, G, and B three primary color sub-pixels are arranged side by side, which is called a pixel. During ...

AI Technical Summary

Problems solved by technology

Due to the small opening of FINE MASK, repeated contact with the substrate will cause many defects and reduce the yield rate of OLED devices. In addition, the production and maintenance costs of FINE MASK are high, and a large number of uses will increase the cost of OLED devices.

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