Light-Emitting Diode (OLED) Technology
by James Dunn
Photo courtesy Samsung
Samsung's prototype 40-inch OLED TV
device that has a clearer picture then
the best HDTV, or allows a phone to be so lightweight and thin that it
unimaginable. Well that is what the
future holds for the new products that will be using OLEDs. OLED devices are composed of thin films of
organic molecules, which emit light when electricity is added, also
called electrophosphorescence. By using
different organic materials to
these films it creates the primary colors red, green, and blue. These solid-state semiconductors tend to be
than 500 nm thick, which is about 200 times smaller than a human hair. OLEDs have either two or three layers of
are four main parts that a OLED contains:
Substrate- This is what
supports the OLED and is usually
clear plastic, glass, or foil.
Anode- When current flows
through the device then removes
electrons, which is also known as adding electron “holes”.
Organic Layers- This is made
of polymers or organic molecules.
Layer- This layer is made of
such as polyaniline, which transport “holes” from the anode.
Emissive Layer- This layer is made from another organic
molecule, such as polyfluorene, and transports electrons from the
Cathode- This is
when the light is made the cathode
injects electrons when a current flows through the device.
It does not always have to be transparent it
just depends on the type of device being used.
#3: How Stuff
courtesy how stuff works
an OLED works Types
of OLEDs Similar
of now and the future