Organic electroluminescence device and fabrication method thereof
View Patent ↗An organic electroluminescence (EL) device includes first and second substrates spaced apart by a predetermined interval and facing each other; an array element having thin film transistors formed in a unit of sub-pixel on an inner surface of the first substrate; a color conversion portion disposed below the second substrate and having red (R), green (G) and blue (B) conversion layers for converting blue light into three primary colors of red (R), green (G) and blue (B); a lamination film formed below the color conversion portion; a first electrode disposed below the lamination film and made of a transparent conductive material; an organic EL layer formed in the unit of sub-pixel below the first electrode; a second electrode patterned in the unit of sub-pixel below the organic EL layer; and a conductive spacer electrically connecting the thin film transistors provided in the unit of the sub-pixels with the second electrode.
1. A method of fabricating an organic electroluminescence (EL) device, the method comprising:
preparing a first substrate and a second substrate, each including red (R), green (G) and blue (B) sub-pixels;
forming a switching element in each of the sub-pixels on the first substrate;
forming a color conversion portion including a red (R), green (G) and blue (B) conversion layers and a black matrix layer interposed between the color conversion layers in each of the sub-pixels;
forming a lamination film by attaching at least two thin films on substantially an entire surface of the second substrate including the color conversion portion;
forming a first electrode below the lamination film, the first electrode including a transparent conductive material;
forming an organic EL layer below the first electrode;
forming a second electrode in each of the sub-pixels below the organic EL layer;
connecting the first and second substrates using a conductive spacer; and
joining the first and second substrates and providing a seal pattern beneath the lamination film,
wherein the lamination film is formed of a film having a low moisture permeability and has a thickness of 30-100 nm,
wherein the lamination film is formed below the color conversion portion to shield moisture discharged from the R, G and B color conversion layer.
2. The method according to claim 1 , wherein the lamination film is formed by a laminating process.
3. The method according to claim 1 , wherein the second substrate includes a transparent substrate and a portion of the lamination film is contacted to the transparent substrate.