Organic electroluminescence device with prescribed optical path length
US6469438B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Dec 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
Abstract
An organic ELECTROLUMINESCENCE device exhibiting a minimal change in the color purity (CIE chromaticity coordinates) even if there is some fluctuation in the optical path length, and a method of manufacturing such an organic EL device are provided.The organic EL device contains an organic layer formed between electrodes at least one of which is a transparent electrode, wherein the total optical path length (t) of the transparent electrode and the organic layer satisfies the following inequality (a) or inequality (b) or both:Min−20 nm<t<Min+20 nm  (a)Max−20 nm<t<Max+20 nm  (b)wherein t is the total optical path length (nm), Min is the optical path length (nm) at which the CIEx chromaticity coordinates or CIEy chromaticity coordinates measured according to JIS Z 8701 exhibits a minimum value, and Max is the optical path length (nm) at which the CIEx chromaticity coordinates or CIEy chromaticity coordinates measured according to JIS Z 8701 exhibit a maximum value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.