Electroluminescence element and method for fabricating same
US5747929A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1995 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Sep 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thin-film electroluminescence element is formed by laminating, in order, on a glass substrate which is an insulating substrate, a first transparent electrode including optically transparent ZnO, a first insulating layer including optically transparent strontium titanate, a luminescent layer including CaGa.sub.2.9 S.sub.4.2 to which Ce is added as a luminescent center, a second insulating layer including optically transparent strontium titanate and a second transparent electrode including optically transparent ZnO. The optical spectrum of the luminescent layer deviates towards a short wavelength side due to the crystal structure changing and the ligand field surrounding the Ce changing slightly due to the existence of excess Ga in the luminescent layer. Also, because calcium thiogallate is used, high light intensity can be maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.