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Berdnikov Y, Ilkiv I, Sibirev N, Ubyivovk E, Bouravleuv A. Comparison of GaAs nanowire growth seeded by Ag and Au colloidal nanoparticles on silicon. NANOTECHNOLOGY 2020; 31:374005. [PMID: 32460266 DOI: 10.1088/1361-6528/ab96e1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We present a comparative study of GaAs nanowire growth on Si(111) substrates by molecular beam epitaxy with the assistance of Au and Ag colloidal nanoparticles. Our approach allows the synthesis of nanowires with different catalyst materials in separate sectors of the same substrate within the same epitaxial process. We match the experimental results to the modeling of chemical potentials and nanowire length distributions to analyze the impact of silicon incorporation into the catalyst droplets on the growth rates and size homogeneity in ensembles of Au- and Ag-catalyzed GaAs nanowires.
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Affiliation(s)
- Yury Berdnikov
- ITMO University, Kronverkskiy 49, St. Petersburg, 197101 Russia
| | - Igor Ilkiv
- St. Petersburg Academic University, Khlopina 8/3, St. Petersburg, 194021 Russia
- St. Petersburg State University, Universitetskaya emb. 7/9, St. Petersburg, 199034 Russia
| | - Nickolay Sibirev
- St. Petersburg State University, Universitetskaya emb. 7/9, St. Petersburg, 199034 Russia
| | - Evgeniy Ubyivovk
- ITMO University, Kronverkskiy 49, St. Petersburg, 197101 Russia
- St. Petersburg State University, Universitetskaya emb. 7/9, St. Petersburg, 199034 Russia
| | - Alexei Bouravleuv
- St. Petersburg Academic University, Khlopina 8/3, St. Petersburg, 194021 Russia
- St. Petersburg Electrotechnical University, Prof. Popova 5, St. Petersburg, 197376 Russia
- Institute for Analytical Instrumentation RAS, Ivana Chernykh 31-33, St. Petersburg, 198095 Russia
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Effect of the Uniaxial Compression on the GaAs Nanowire Solar Cell. MICROMACHINES 2020; 11:mi11060581. [PMID: 32532075 PMCID: PMC7345117 DOI: 10.3390/mi11060581] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 11/16/2022]
Abstract
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.
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Koryakin AA, Kukushkin SA, Kotlyar KP, Ubyivovk ED, Reznik RR, Cirlin GE. A new insight into the mechanism of low-temperature Au-assisted growth of InAs nanowires. CrystEngComm 2019. [DOI: 10.1039/c9ce00774a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We propose a new insight into the mechanism of low-temperature Au-assisted growth of InAs nanowires. The nanowire MBE growth was achieved at temperature of 270 °C on silicon substrates and was described theoretically via vapor–solid–solid mechanism.
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Affiliation(s)
- Alexander A. Koryakin
- St. Petersburg Academic University
- St. Petersburg 194021
- Russia
- ITMO University
- St. Petersburg 197101
| | - Sergey A. Kukushkin
- Institute of Problems of Mechanical Engineering RAS
- St. Petersburg 199178
- Russia
| | | | - Evgenii D. Ubyivovk
- Saint Petersburg State University
- Russia
- ITMO University
- St. Petersburg 197101
- Russia
| | | | - George E. Cirlin
- St. Petersburg Academic University
- St. Petersburg 194021
- Russia
- ITMO University
- St. Petersburg 197101
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Timofeeva M, Lang L, Timpu F, Renaut C, Bouravleuv A, Shtrom I, Cirlin G, Grange R. Anapoles in Free-Standing III-V Nanodisks Enhancing Second-Harmonic Generation. NANO LETTERS 2018; 18:3695-3702. [PMID: 29771127 DOI: 10.1021/acs.nanolett.8b00830] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Nonradiating electromagnetic configurations in nanostructures open new horizons for applications due to two essential features: a lack of energy losses and invisibility to the propagating electromagnetic field. Such radiationless configurations form a basis for new types of nanophotonic devices, in which a strong electromagnetic field confinement can be achieved together with lossless interactions between nearby components. In our work, we present a new design of free-standing disk nanoantennas with nonradiating current distributions for the optical near-infrared range. We show a novel approach to creating nanoantennas by slicing III-V nanowires into standing disks using focused ion-beam milling. We experimentally demonstrate the suppression of the far-field radiation and the associated strong enhancement of the second-harmonic generation from the disk nanoantennas. With a theoretical analysis of the electromagnetic field distribution using multipole expansions in both spherical and Cartesian coordinates, we confirm that the demonstrated nonradiating configurations are anapoles. We expect that the presented procedure of designing and producing disk nanoantennas from nanowires becomes one of the standard approaches to fabricating controlled chains of standing nanodisks with different designs and configurations. These chains can be essential building blocks for new types of lasers and sensors with low power consumption.
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Affiliation(s)
- Maria Timofeeva
- ETH Zurich , Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics , Auguste-Piccard Hof 1 , 8093 Zurich , Switzerland
| | - Lukas Lang
- ETH Zurich , Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics , Auguste-Piccard Hof 1 , 8093 Zurich , Switzerland
| | - Flavia Timpu
- ETH Zurich , Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics , Auguste-Piccard Hof 1 , 8093 Zurich , Switzerland
| | - Claude Renaut
- ETH Zurich , Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics , Auguste-Piccard Hof 1 , 8093 Zurich , Switzerland
| | - Alexei Bouravleuv
- Saint Petersburg Academic University , Ul. Khlopina 8/3 , 194021 Saint Petersburg , Russia
| | - Igor Shtrom
- Saint Petersburg Academic University , Ul. Khlopina 8/3 , 194021 Saint Petersburg , Russia
| | - George Cirlin
- ITMO University , Kronverkskiy 49 , 197101 Saint Petersburg , Russia
| | - Rachel Grange
- ETH Zurich , Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics , Auguste-Piccard Hof 1 , 8093 Zurich , Switzerland
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