|
Conjugated polymers having spiro centers and their use as electroluminescence materials - Patent 5621131 (4208 words) |
 | For the purposes of the invention, a polymer is a compound whose electroluminescence spectrum is essentially unchanged on attaching further recurring units. |
| To be used as electroluminescence materials, the polymers of the invention are generally applied in the form of a film to a substrate by known methods with which those skilled in the art are familiar, such as casting, dipping or spin coating. |
| Electroluminescence devices are used, for example, as self-illuminating display elements such as control lamps, alphanumeric displays, signs, and in optoelectronic couplers. |
|
Electroluminescence - Wikipedia, the free encyclopedia (457 words) |
| Electroluminescence (EL) is an optical phenomenon and electrical phenomenon where a material emits light in response to an electric current passed through it, or to a strong electric field. |
| Electroluminescence is the result of radiative recombination of electrons and holes in a material (usually a semiconductor). |
| Prior to recombination, electrons and holes are separated either as a result of doping of the material to form a p-n junction (in semiconductor electroluminescent devices such as LEDs), or through excitation by impact of high-energy electrons accelerated by a strong electric field (as with the phosphors in electroluminescent displays). |
Feeds |
Contact