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Powerspot. Thermoelectric modules
 A thermoelectric couple is a device consisting of two dissimilar
semiconductors that contact each other at one or more points.
 Voltage is produced when the temperature of one of the contact
points differs from the temperature of another, causing the electrons
to move away from the hot end toward the cold end. When the
electrons go from the hot side to the cold side this causes an
electrical current.
 Multiple thermoelectric couples can be connected in series in
order to compose a thermopile, also known as Thermoelectric
module, or Thermoelectric generator (TEG).
 Modern thermoelectric generators often use highly doped
semiconductors made from bismuth telluride (Bi2Te3).