pyroelectric

/ˌpaɪroʊɪˈlɛktrɪk/
adjective
  1. Relating to or having the property of generating an electric charge when heated or cooled.
    • Some pyroelectric materials are used in infrared cameras to detect temperature differences.
    • Scientists studied the pyroelectric properties of the crystal to develop new energy-harvesting devices.
    • The pyroelectric sensor in the motion detector responds to changes in body heat.