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Piezotronics and Piezo-Phototronics (Hardcover, 2013 ed.)
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Piezotronics and Piezo-Phototronics (Hardcover, 2013 ed.)
Series: Microtechnology and MEMS
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The fundamental principle of piezotronics and piezo-phototronics
were introduced by Wang in 2007 and 2010, respectively. Due to the
polarization of ions in a crystal that has non-central symmetry in
materials, such as the wurtzite structured ZnO, GaN and InN, a
piezoelectric potential (piezopotential) is created in the crystal
by applying a stress. Owing to the simultaneous possession of
piezoelectricity and semiconductor properties, the piezopotential
created in the crystal has a strong effect on the carrier transport
at the interface/junction. Piezotronics is for devices fabricated
using the piezopotential as a "gate" voltage to control charge
carrier transport at a contact or junction. The piezo-phototronic
effect uses the piezopotential to control the carrier generation,
transport, separation and/or recombination for improving the
performance of optoelectronic devices, such as photon detector,
solar cell and LED. The functionality offered by piezotroics and
piezo-phototronics are complimentary to CMOS technology. There is
an effective integration of piezotronic and piezo-phototronic
devices with silicon based CMOS technology. Unique applications can
be found in areas such as human-computer interfacing, sensing and
actuating in nanorobotics, smart and personalized electronic
signatures, smart MEMS/NEMS, nanorobotics and energy sciences. This
book introduces the fundamentals of piezotronics and
piezo-phototronics and advanced applications. It gives guidance to
researchers, engineers and graduate students.
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