White light-emitting organic electroluminescence (EL) device and method of adjusting chromaticity of the device
US7812521B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2008 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | May 26, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/10
Abstract
The white light-emitting organic EL device of the present invention comprises: an anode, a cathode, at least a red light-emitting layer, a blue light-emitting layer and a green light-emitting layer provided between the anode and the cathode, and an intermediate layer between any two adjacent layers of the respective light-emitting layers, wherein, when CIE chromaticity coordinates of a dopant incorporated into the red light-emitting layer are represented by (xR, yR), CIE chromaticity coordinates of a dopant incorporated into the blue light-emitting layer are represented by (xB, yB), CIE chromaticity coordinates of a dopant incorporated into the green light-emitting layer are represented by (xG, yG), and target CIE chromaticity coordinates of white light emitted from the device are represented by (xt, yt), Δy represented as a difference between yR and yB, and Δx represented as a difference between xG and xt satisfy the following relationships:Δy≦0.18Δx≦0.10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.