Polymer:  A chemical compound or mixture of compounds formed by polymerization and consisting essentially of repeating structural units
 
Electronics:  A branch of physics that deals with the emission, behavior, and effects of electrons (as in electron tubes and transistors) and with electronic devices
 
In constructing a polymer electronic device we are fundamentally interested controlling the flow of energy
· Where and how it is absorbed
· Where and how it flows
· Where and how it is emitted
     Also:  How the device interacts with the environment around it
 
There are now many different types of polymer based electronics:
Transistors, Light Emitting Diodes, Photovoltaic, Sensors are just a few examples.
 
To fully understand and appreciate the difficulties with polymer based electrons we first need to review more conventional device technologies (i.e., metals, oxides and inorganic semiconductors).
Polymer Electronics
(A tutorial)