Electrochemical light-emitting devices

Details Electrochemical light-emitting devices Electrochemical light-emitting devices

1994-06-28

1997-10-28

Crane, Sara W.

Active solid-state devices (e.g., transistors, solid-state diode

Organic semiconductor material

257102, 257103, 313498, 313504, H01L 3524, H01L 5100

Patent

active

056820437

ABSTRACT:
Electrochemical light emitting devices are disclosed which include a composite material in contact with two electrodes. The composite material is an admixture of ionic species and an `immobile` semiconductor. The semiconductor is capable of supporting both p- and n-type carriers and having a doping profile which can be dynamically changed in a controlled fashion through reversible electrochemical oxidation and reduction. Devices having this structure may be used to generate electrochemically induced p-n junctions, thereby providing a new means of exploiting the light emitting properties of such junctions under an applied voltage. Systems and methods for generating useful levels of light employing these devices are also disclosed.

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