The organic light emitting diode (OLED) technology is used to create solid-based light emitting monolithic devices. OLEDs are organic semiconductors with the appearance of a thin film. It basic stucture is composed of a series of organic layers placed between two conductors. When an electrical charge is applied to the organic light emitting diode; it illuminates instantanously! The factors that determines the device's performance depends on the organic materials used and its layer structure.
An (OLED) consists of the following parts:
Substact: It supports the OLED and is usually consistuted of glass, plastic, foil or thin film.
Anode: It is a transparent component removing electrons when electricity is passing trew.
Conductive and Emissive Layers: Composed of organic molecules or polymers.
Cathode: Its role is to inject electrons when electricity is charged.
Making of (OLEDs)
The biggest manufacturing challenge is to apply the organic layers to the substacte. There are 3 ways of doing this:
- Vacuum deposition or vacuum thermal evaporation: Expensive and inefficient
- Organic vapor phase deposition: Efficient and reduces costs
- Inkjet printing: This technology greatly reduces manufacturing costs.
Links:
http://206.106.174.125/tech.htm
http://electronics.howstuffworks.com/oled1.htm
http://www.wisegeek.com/what-is-an-oled.htm
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