Modeling multijunction solar cells by nonlocal tunneling and subcell analysis

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Resumé

Multijunction solar cells have been demonstrated as an efficient approach to overcome the Shockley–Queisser limit and achieve high efficiency. However, cost reduction and further development of high-efficiency tandem solar cells require many device optimization studies and ask for heavy theoretical assistance. In this paper, we present a versatile alternative via an updated version of a free solar cell simulation software, wxAMPS, which incorporates a nonlocal band-to-band tunneling model and several specific physical mechanisms into the solver to better describe the device behavior of tandem solar cells. The simulation results are compared against a commercial technology computer-aided design program, showing satisfactory agreement. Moreover, a useful feature, subcell analysis, has been developed to give better insight into the individual subcell performance of the devices and to provide guidance for current matching. The algorithm used in the subcell analysis, which avoids the complexity in treating nonlocal behaviors of tunneling junctions, notably accelerates the tandem solar cell simulation, and thus allows implementing batch simulation for device optimization. The results of the subcell analysis have been used to experimentally optimize subcell thicknesses and successfully improved the efficiency of the tandem solar cell.
OriginalsprogEngelsk
TidsskriftIEEE Journal of Photovoltaics
Vol/bind8
Udgave nummer5
Sider (fra-til)1363-1369
ISSN2156-3381
DOI
StatusUdgivet - 2018

Fingeraftryk

Solar cells
solar cells
simulation
Cost reduction
optimization
cost reduction
computer aided design
Computer aided design
Multi-junction solar cells
computer programs

Citer dette

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title = "Modeling multijunction solar cells by nonlocal tunneling and subcell analysis",
abstract = "Multijunction solar cells have been demonstrated as an efficient approach to overcome the Shockley–Queisser limit and achieve high efficiency. However, cost reduction and further development of high-efficiency tandem solar cells require many device optimization studies and ask for heavy theoretical assistance. In this paper, we present a versatile alternative via an updated version of a free solar cell simulation software, wxAMPS, which incorporates a nonlocal band-to-band tunneling model and several specific physical mechanisms into the solver to better describe the device behavior of tandem solar cells. The simulation results are compared against a commercial technology computer-aided design program, showing satisfactory agreement. Moreover, a useful feature, subcell analysis, has been developed to give better insight into the individual subcell performance of the devices and to provide guidance for current matching. The algorithm used in the subcell analysis, which avoids the complexity in treating nonlocal behaviors of tunneling junctions, notably accelerates the tandem solar cell simulation, and thus allows implementing batch simulation for device optimization. The results of the subcell analysis have been used to experimentally optimize subcell thicknesses and successfully improved the efficiency of the tandem solar cell.",
author = "Yiming Liu and Mehrad Ahmadpour and Jost Adam and Jakob Kjelstrup-Hansen and Horst-G{\"u}nter Rubahn and Morten Madsen",
year = "2018",
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Modeling multijunction solar cells by nonlocal tunneling and subcell analysis. / Liu, Yiming; Ahmadpour, Mehrad ; Adam, Jost; Kjelstrup-Hansen, Jakob; Rubahn, Horst-Günter; Madsen, Morten.

I: IEEE Journal of Photovoltaics, Bind 8, Nr. 5, 2018, s. 1363-1369.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Modeling multijunction solar cells by nonlocal tunneling and subcell analysis

AU - Liu, Yiming

AU - Ahmadpour, Mehrad

AU - Adam, Jost

AU - Kjelstrup-Hansen, Jakob

AU - Rubahn, Horst-Günter

AU - Madsen, Morten

PY - 2018

Y1 - 2018

N2 - Multijunction solar cells have been demonstrated as an efficient approach to overcome the Shockley–Queisser limit and achieve high efficiency. However, cost reduction and further development of high-efficiency tandem solar cells require many device optimization studies and ask for heavy theoretical assistance. In this paper, we present a versatile alternative via an updated version of a free solar cell simulation software, wxAMPS, which incorporates a nonlocal band-to-band tunneling model and several specific physical mechanisms into the solver to better describe the device behavior of tandem solar cells. The simulation results are compared against a commercial technology computer-aided design program, showing satisfactory agreement. Moreover, a useful feature, subcell analysis, has been developed to give better insight into the individual subcell performance of the devices and to provide guidance for current matching. The algorithm used in the subcell analysis, which avoids the complexity in treating nonlocal behaviors of tunneling junctions, notably accelerates the tandem solar cell simulation, and thus allows implementing batch simulation for device optimization. The results of the subcell analysis have been used to experimentally optimize subcell thicknesses and successfully improved the efficiency of the tandem solar cell.

AB - Multijunction solar cells have been demonstrated as an efficient approach to overcome the Shockley–Queisser limit and achieve high efficiency. However, cost reduction and further development of high-efficiency tandem solar cells require many device optimization studies and ask for heavy theoretical assistance. In this paper, we present a versatile alternative via an updated version of a free solar cell simulation software, wxAMPS, which incorporates a nonlocal band-to-band tunneling model and several specific physical mechanisms into the solver to better describe the device behavior of tandem solar cells. The simulation results are compared against a commercial technology computer-aided design program, showing satisfactory agreement. Moreover, a useful feature, subcell analysis, has been developed to give better insight into the individual subcell performance of the devices and to provide guidance for current matching. The algorithm used in the subcell analysis, which avoids the complexity in treating nonlocal behaviors of tunneling junctions, notably accelerates the tandem solar cell simulation, and thus allows implementing batch simulation for device optimization. The results of the subcell analysis have been used to experimentally optimize subcell thicknesses and successfully improved the efficiency of the tandem solar cell.

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DO - 10.1109/JPHOTOV.2018.2851308

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JO - IEEE Journal of Photovoltaics

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