| 摘要 |
An organic electroluminescence device is capable of enhancing reflectance of an anode, resulting in improved light-emitting efficiency. An anode, a thin film layer for hole injection, an insulating layer, an organic layer including a luminescent layer and a cathode including a semi-transparent electrode are laminated in order on a substrate. The anode comprises silver which is a metal with high reflectance or an alloy including silver, and the thin film layer for hole injection comprises chromium oxide or the like. Light generated in the luminescent layer is multiply reflected between the anode and the semi-transparent electrode to be emitted from the cathode. As the reflectance of the anode is enhanced, the light generated in the luminescent layer can be efficiently emitted. An alloy comprised in the anode preferably includes silver, palladium and copper, and a silver content is preferably 50% by mass or over. |
| 主权项 |
1. An organic electroluminescence device, comprising:
an anode that includes silver, the anode generally extending in a horizontal direction, parallel to a substrate and perpendicular to a thickness direction of the anode; a first hole injection layer provided over the anode, the first hole injection layer generally extending in the horizontal direction and includes ITO (Indium Tin Oxide); organic layers including at least a luminescent layer and a second hole injection layer provided over the first hole injection layer, and the second hole injection layer includes a material that is different from the first hole injection layer; and a cathode provided over the organic layers, wherein
the organic electroluminescence device is configured to emit light generated in the luminescent layer from a side of the cathode,each of the organic layers have different thicknesses,the cathode extends generally in the horizontal direction over a central portion of a light emission region,the cathode includes a first surface that faces the organic layers and a second surface opposite the first surface,the first hole injection layer substantially covers a surface of the anode that faces the organic layers,an end portion of the anode and an end portion of the first hole injection layer are covered by an insulating layer, an upper surface of the insulating layer extending along a first angled upward direction between the horizontal direction and the thickness direction of the anode, and the upper surface of the insulating layer has a curved portion,outer regions of the organic layers and the cathode over the end portion of the anode extend at the curved portion along a second angled upward direction between the horizontal direction and the first angled upward direction, andin the curved portion over the end portion of the anode, the first surface of the cathode and the second surface of the cathode both extend along the second angled upward direction. |
