Luminous element with hygroscopic film and process for preparing hygroscopic film

Abstract

The ivnention relates to a luminescence component possessing a moisture retentive film and its preparing method. A low electrode, a luminescence layer and a pair of opposition electrodes are formed on a substrate is sequence. The said assembly is put on a working chamber where there is a feed channel. Barium, magnesium, calcium etc. materials go into the feed channel, which is faced to the opposition electrodes. Barium, magnesium and calcium are oxidized to form baryta, magnesia and calcium oxide etc. a moisture retentive film on the surface of the opposition electrodes. The moisture retentive film can absorb some moisture so that it prevents the organic layer from damage by the moisture, restrains black sports from producing and insure working reliability of the luminescence component.

Description

technical field [0001] The invention relates to a light-emitting element with a hygroscopic film and a manufacturing method thereof. Background technique [0002] Organic electroluminescent device (Organic electroluminescent device, hereafter referred to as organic EL device) has a large viewing angle, low response time, thin display, low power consumption, simple manufacturing process, impact resistance, no backlight and full-color emission Due to the advantages of the light source, it has attracted attention and been used in the new generation of display panels. [0003] see figure 1 , is a cross-sectional view of the structure of a conventional organic electroluminescent element, which mainly forms a lower electrode (transparent electrode) 12 on a substrate 11, and sequentially vapor-deposits a transparent electrode 12 at an appropriate position of the lower electrode 12, which may include a void Hole injection layer (hole injection layer), hole transport layer (hole tr...

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Problems solved by technology

[0008] 1. The moisture-absorbing film is fixed on the vertical extension direction of the organic layer and the counter electrode. If the component is hit by an external force and may cause the hygroscopic film to fall, the falling force will directly hit the counter electrode or the organic layer, not only Damage to components will also reduce their service life;

[0009] 2. The main reason why the hygroscopic film cannot be installed on the surface of the counter electrode is that when the hygroscopic film is to be formed on the surface of the counter electrode, its working temperature is too high. Affect the work reliability and production yield of the organic layer; and

[0010] 3. Using the method of firstly installing a hygroscopic film on the cover body of the isolation sealing cover, and then fixing it on the periphery of the light-emitting element, not only the manufacturing process is cumbersome, but also the regret that the volume of the element cannot be effectively reduced

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