Piezoelectric Current Generation in Wurtzite GaAs Nanowires. Issue 1 (20th November 2017)

• Record Type: Journal Article
• Authors: Alekseev, Prokhor A.; Sharov, Vladislav A.; Geydt, Pavel; Dunaevskiy, Mikhail S.; Lysak, Volodymyr V.; Cirlin, George E.; Reznik, Rodion R.; Khrebtov, Artem I.; Soshnikov, Ilya P.; Lähderanta, Erkki
• Is Part Of: Physica status solidi. Volume 12:Issue 1(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-11-20
• Subjects: III‐V nanowires -- atomic force microscope -- GaAs -- nanogenerators -- piezo‐phototronic effect -- wurtzite; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201700358
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : Generation of electric current is observed when GaAs nanowires with wurtzite crystal structure are bent by the probe of an atomic force microscope. The current originates from a piezo active phase in the nanowires due to the piezoelectric effect. Increasing of the piezo‐potential in bent nanowires enhances tunneling through the probe–nanowire Schottky barrier due to the thermionic field emission. Laser illumination amplifies short‐circuit current pulses by two orders of magnitude from 9 pA to 1 nA due to the piezo‐phototronic effect. Utilization of such piezo‐phototronic effect in GaAs nanowires is a solution to accelerate the efficiency of hybrid energy sources "piezoelectric nanogenerator − solar cell" comprised of III–V nanowires. Abstract : Generation of a short‐circuit current is found in wurtzite GaAs nanowires bent by the probe of an atomic force microscope. Laser illumination amplifies current pulses by two orders of magnitude from 9 pA to 1 nA due to the piezo‐phototronic effect.