Patent ID: 6861800
Filing Date: 2005-03-01
Classification: H01L

Abstract:
1. A color organic light-emitting display device having an array of pixels divided into at least two different color pixel sets, each color pixel set emitting a different predetermined color light over a common substrate, wherein each pixel in the array includes: a metallic bottom-electrode layer disposed over the substrate; a metallic top-electrode layer spaced from the metallic bottom-electrode layer; an organic EL element disposed between the top-electrode layer and the bottom-electrode layer and arranged to produce broadband light; and a transparent conductive phase-layer disposed between the metallic bottom-electrode layer and the organic EL element; wherein the organic EL element is common for all color pixels; wherein the thickness of the transparent conductive phase-layer is separately selected for pixels in different color pixel sets to cause the pixels in different color pixel sets to emit the different predetermined color light; wherein one of the metallic electrode layers is semitransparent and the other one is essentially opaque and reflective; wherein the material for reflective metallic electrode layer includes Ag, Au, Al, or alloys thereof, the material for the semitransparent metallic electrode layer includes Ag, Au, or alloys thereof; and wherein the thickness of the semitransparent metallic electrode layer, the combined thickness of organic layers of the organic EL element and the transparent conductive phase-layer, and the placement of a light-emitting layer of the organic EL element are selected so that each pixel in the display forms a tuned microcavity OLED device having an emission output efficiency above that of a comparable OLED device without the microcavity.