Organic Light Emitting Diodes or OLED’s are effectively light emitting diodes made from semiconducting organic polymers. They are currently still under development and have potential application in numerous fields. The technology has advanced such that applications are being envisaged and organisations are committing research funds to the eventual commercialisation of the technology.
Principle of Operation
Organic light emitting diodes are able to operate due to the phenomenon of electroluminescence. The OLED has an organic dye which consists of exciton states. These consist of an excited electron and a hole or empty state. When the hole and electron combine a photon is emitted and light is produced.