Piezotronic and Piezophototronic Effects

Zhong Lin Wang

Research output: Contribution to journalArticlepeer-review

170 Scopus citations

Abstract

Owing to the polarization of ions in a crystal that has noncentral symmetry, a piezoelectric potential (piezopotential) is created in the material by applying a stress. The creation of piezopotential together with the presence of Schottky contacts are the fundamental physics responsible for a few important nanotechnologies. The nanogenerator is based on the piezopotential-driven transient flow of electrons in the external load. On the basis of nanomaterials in the wurtzite semiconductors, such as ZnO and GaN, electronics fabricated by using a piezopotential as a gate voltage are called piezotronics, with applications in strain/force/pressure-triggered/controlled electronic devices, sensors, and logic gates. The piezophototronic effect is a result of three-way coupling among piezoelectricity, photonic excitation, and semiconductor transport, which allows tuning and controlling of electro-optical processes by a strain-induced piezopotential. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1388-1393
Number of pages6
JournalThe Journal of Physical Chemistry Letters
Volume1
Issue number9
DOIs
StatePublished - Apr 13 2010
Externally publishedYes

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