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Tandem Solar Cells Using GaAs Nanowires on Si: Design, Fabrication, and Observation of Voltage Addition

Journal Article · · Nano Letters
Multijunction solar cells provide us a viable approach to achieve efficiencies higher than the Shockley–Queisser limit. Due to their unique optical, electrical, and crystallographic features, semiconductor nanowires are good candidates to achieve monolithic integration of solar cell materials that are not lattice-matched. In this work, we report the first realization of nanowire-on-Si tandem cells with the observation of voltage addition of the GaAs nanowire top cell and the Si bottom cell with an open circuit voltage of 0.956 V and an efficiency of 11.4%. Our simulation showed that the current-matching condition plays an important role in the overall efficiency. Furthermore, we characterized GaAs nanowire arrays grown on lattice-mismatched Si substrates and estimated the carrier density using photoluminescence. A low-resistance connecting junction was obtained using n+-GaAs/p+-Si heterojunction. Lastly, we demonstrated tandem solar cells based on top GaAs nanowire array solar cells grown on bottom planar Si solar cells. The reported nanowire-on-Si tandem cell opens up great opportunities for high-efficiency, low-cost multijunction solar cells.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Energy Nanoscience (CEN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001013
OSTI ID:
1369907
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 11 Vol. 15; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (25)

III–V nanowires on black silicon and low-temperature growth of self-catalyzed rectangular InAs NWs journal April 2018
Chalcogen passivation: an in-situ method to manipulate the morphology and electrical property of GaAs nanowires journal May 2018
Performance Enhancement of Ultra-Thin Nanowire Array Solar Cells by Bottom Reflectivity Engineering journal January 2020
Engineering III–V Semiconductor Nanowires for Device Applications journal October 2019
III-V Semiconductor Single Nanowire Solar Cells: A Review journal July 2018
Growth and Fabrication of High‐Quality Single Nanowire Devices with Radial p‐i‐n Junctions journal December 2018
Exploring time-resolved photoluminescence for nanowires using a three-dimensional computational transient model journal January 2018
Nanoscale investigation of a radial p–n junction in self-catalyzed GaAs nanowires grown on Si (111) journal January 2018
Fundamentals of the nanowire solar cell: Optimization of the open circuit voltage journal September 2018
Nanowires for energy: A review journal December 2018
A review of the electrical properties of semiconductor nanowires: insights gained from terahertz conductivity spectroscopy journal September 2016
A review of recent progress in heterogeneous silicon tandem solar cells journal March 2018
Excitonic terahertz photoconductivity in intrinsic semiconductor nanowires journal May 2018
Optimized efficiency in InP nanowire solar cells with accurate 1D analysis journal December 2017
The effect of Sn addition on GaAs nanowire grown by vapor–liquid–solid growth mechanism journal September 2018
Modal analysis of resonant and non-resonant optical response in semiconductor nanowire arrays journal November 2018
Physics and design for 20% and 25% efficiency nanowire array solar cells journal December 2018
Growth optimization and characterization of regular arrays of GaAs/AlGaAs core/shell nanowires for tandem solar cells on silicon journal December 2018
Rational design of nanowire solar cells: from single nanowire to nanowire arrays journal February 2019
Nanoscale electrical analyses of axial-junction GaAsP nanowires for solar cell applications journal January 2020
Higher efficiency tandem solar cells through composite-cell current matching journal January 2019
Combining 1D and 2D waveguiding in an ultrathin GaAs NW/Si tandem solar cell journal January 2019
A review of the electrical properties of semiconductor nanowires: insights gained from terahertz conductivity spectroscopy text January 2015
GaAs Nanowires Grown by Catalyst Epitaxy for High Performance Photovoltaics journal August 2018
Nanowires for High-Efficiency, Low-Cost Solar Photovoltaics journal February 2019

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