Research output: Contribution to journal › Article › peer-review
Effect of the uniaxial compression on the GaAs nanowire solar cell. / Alekseev, Prokhor A.; Sharov, Vladislav A.; Borodin, Bogdan R.; Dunaevskiy, Mikhail S.; Reznik, Rodion R.; Cirlin, George E.
In: Micromachines, Vol. 11, No. 6, 581, 01.06.2020, p. 1-13.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of the uniaxial compression on the GaAs nanowire solar cell
AU - Alekseev, Prokhor A.
AU - Sharov, Vladislav A.
AU - Borodin, Bogdan R.
AU - Dunaevskiy, Mikhail S.
AU - Reznik, Rodion R.
AU - Cirlin, George E.
N1 - Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - Research regarding ways to increase solar cell efficiency is in high demand. Mechanical deformation of a nanowire (NW) solar cell can improve its efficiency. Here, the effect of uniaxial compression on GaAs nanowire solar cells was studied via conductive atomic force microscopy (C-AFM) supported by numerical simulation. C-AFM I-V curves were measured for wurtzite p-GaAs NW grown on p-Si substrate. Numerical simulations were performed considering piezoresistance and piezoelectric effects. Solar cell efficiency reduction of 50% under a-0.5% strain was observed. The analysis demonstrated the presence of an additional fixed electrical charge at the NW/substrate interface, which was induced due to mismatch between the crystal lattices, thereby affecting the efficiency. Additionally, numerical simulations regarding the p-n GaAs NW solar cell under uniaxial compression were performed, showing that solar efficiency could be controlled by mechanical deformation and configuration of the wurtzite and zinc blende p-n segments in the NW. The relative solar efficiency was shown to be increased by 6.3% under-0.75% uniaxial compression. These findings demonstrate a way to increase efficiency of GaAs NW-based solar cells via uniaxial mechanical compression.
AB - Research regarding ways to increase solar cell efficiency is in high demand. Mechanical deformation of a nanowire (NW) solar cell can improve its efficiency. Here, the effect of uniaxial compression on GaAs nanowire solar cells was studied via conductive atomic force microscopy (C-AFM) supported by numerical simulation. C-AFM I-V curves were measured for wurtzite p-GaAs NW grown on p-Si substrate. Numerical simulations were performed considering piezoresistance and piezoelectric effects. Solar cell efficiency reduction of 50% under a-0.5% strain was observed. The analysis demonstrated the presence of an additional fixed electrical charge at the NW/substrate interface, which was induced due to mismatch between the crystal lattices, thereby affecting the efficiency. Additionally, numerical simulations regarding the p-n GaAs NW solar cell under uniaxial compression were performed, showing that solar efficiency could be controlled by mechanical deformation and configuration of the wurtzite and zinc blende p-n segments in the NW. The relative solar efficiency was shown to be increased by 6.3% under-0.75% uniaxial compression. These findings demonstrate a way to increase efficiency of GaAs NW-based solar cells via uniaxial mechanical compression.
KW - GaAs
KW - Gallium arsenide
KW - Nanowire
KW - Piezoelectric
KW - Piezophototronic
KW - Piezoresistance
KW - Polarization
KW - Solar cell
KW - Wurtzite
KW - Zinc blende
UR - http://www.scopus.com/inward/record.url?scp=85087930378&partnerID=8YFLogxK
U2 - 10.3390/mi11060581
DO - 10.3390/mi11060581
M3 - Article
AN - SCOPUS:85087930378
VL - 11
SP - 1
EP - 13
JO - Micromachines
JF - Micromachines
SN - 2072-666X
IS - 6
M1 - 581
ER -
ID: 98505586