Fabrication of poly(p-phenyleneacetylene) light-emitting diodes
US5334539A · kind A · utility
37Cited by
3References
20Claims
0Family size
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Key dates
| Filing date | Jan 29, 1993 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jan 29, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/11
Abstract
Acetylene containing poly(p-phenyleneacetylene) (PPA) - based light-emitting diodes (LEDs) are provided. The LEDs are fabricated by coating a hole-injecting electrode, preferably an indium tin oxide (ITO) coated glass substrate, with a PPA polymer, such as a 2,5-dibutoxy or a 2,5-dihexoxy derivative of PPA, dissolved in an organic solvent. This is then followed by evaporating a layer of material capable of injecting electrons, such as A1 or A1/Ca, onto the polymer to form a base electrode. This composition is then annealed to form efficient EL diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.