Unformatted text preview: ectric strain coefficients. 5 Piezoelectric Properties
Can produce voltage output from applied stress (strain), or produce stress when voltage is applied. Nanobelts and various nanoscale features of ZnO give higher piezoelectric constants (likely due to less dislocations and the impurityfree singlecrystalline structures).
Piezoelectrics used in: sensors (acoustic and electronic, as pickups in electric guitars, detection/generation of sonar waves, etc.); actuators (high
precision motors, loudspeakers, atomic force microscope probe control); possible future use in vibration and noise reduction (housing, automobiles).
6 Semiconductor Properties
• Zinc oxide is a direct widebandgap semiconductor (~3.33.4eV).
• Allows for efficient photon emission, as in LED’s or laser diodes (rather than phonon emission with energy loss and heat generation).
• Can easily be ndoped with aluminum, indium, or extra zinc.
• Possesses high electron mobility and photoconductivity – can help speed up currents in semiconductor...
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