Light-emitting organic compound and EL display device utilizing the same
First Claim
Patent Images
1. A light-emitting device comprising:
- a substrate;
a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer;
a cover member over the substrate and the plurality of light-emitting elements; and
a plurality of color filters between the substrate and the cover member,wherein the light-emitting layer comprises an element belonging to Group 1 or 2 at a concentration of 0.1 ppm or lower.
0 Assignments
0 Petitions
Accused Products
Abstract
By repeating a purification process of a light-emitting organic compound several times, a thin film made of the light-emitting organic compound to be used in an EL display device contains ionic impurities at the concentration of 0.1 ppm or lower and has a volume resistivity in the range of 3×1010 Ωcm or larger. By using such a thin film as a light-emitting layer in the EL device, a current caused by reasons other than the carrier recombination can be prevented from flowing through the thin film, and deterioration caused by unnecessary heat generation can be suppressed. Accordingly, it is possible to obtain an EL display device with high reliability.
40 Citations
26 Claims
-
1. A light-emitting device comprising:
-
a substrate; a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer; a cover member over the substrate and the plurality of light-emitting elements; and a plurality of color filters between the substrate and the cover member, wherein the light-emitting layer comprises an element belonging to Group 1 or 2 at a concentration of 0.1 ppm or lower. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A light-emitting device comprising:
-
a substrate; a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer; and a cover member over the substrate and the plurality of light-emitting elements, wherein the light-emitting layer comprises an element belonging to Group 1 or 2 at a total concentration of 0.1 ppm or lower. - View Dependent Claims (7, 8, 9, 10, 11)
-
-
12. A light-emitting device comprising:
-
a substrate; a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer; a cover member over the substrate and the plurality of light-emitting elements; an insulating film over the plurality of light-emitting elements; a liquid filler agent over the insulating film; and a plurality of color filters adjacent to the liquid filler agent, wherein a space between the insulating film and the plurality of color filters is filled with the liquid filler agent, and wherein the light-emitting layer comprises an element belonging to Group 1 or 2 at a concentration of 0.1 ppm or lower. - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. A light-emitting device comprising:
-
a substrate; a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer; a cover member over the substrate and the plurality of light-emitting elements; and a plurality of color filters between the substrate and the cover member, wherein the light-emitting layer comprises sodium and potassium at a concentration of 0.1 ppm or lower. - View Dependent Claims (19, 20)
-
-
21. A light-emitting device comprising:
-
a substrate; a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer; and a cover member over the substrate and the plurality of light-emitting elements, wherein the light-emitting layer comprises sodium and potassium at a concentration of 0.1 ppm or lower. - View Dependent Claims (22, 23)
-
-
24. A light-emitting device comprising:
-
a substrate; a plurality of light-emitting elements over the substrate, each light-emitting element comprising a first electrode over the substrate, a light-emitting layer over the first electrode, and a second electrode over the light-emitting layer; a cover member over the substrate and the plurality of light-emitting elements; an insulating film over the plurality of light-emitting elements; a liquid filler agent over the insulating film; and a plurality of color filters adjacent to the liquid filler agent, wherein a space between the insulating film and the plurality of color filters is filled with the liquid filler agent, and wherein the light-emitting layer comprises sodium and potassium at a concentration of 0.1 ppm or lower. - View Dependent Claims (25, 26)
-
Specification