Extremely low material consumption III/V solar cell

I. Kolpakov, E.A. Bochicchio, K. Korzun, P.A.L.M. Koolen, B. van Gorkom, W.J.H. Berghuis, R. Veldhoven, J.E.M. Haverkort

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

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III/V semiconductor solar cells feature the highest photon conversion efficiencies (PCE), but they are still too expensive for terrestrial application. Conventional nanowire (NW) solar cells already partially resolve this issue since they can be grown on a silicon substrate and feature a low filling factor (the ratio of the 180 nm NW diameter to 500 nm NW pitch, squared). We take the next step by depositing PMMA micro-lenses with a diameter of 6 μm on top of a NW-array with the same 6 μm pitch, allowing to reduce the material consumption by more than 3 orders of magnitude. According to our FDTD simulations, the material consumption can even be further decreased by reducing the NW length with a factor of 2 down to 1 μm, since the lens is focusing the solar radiation near the top of the nanowires. We also expect a significantly increased Voc due to an increased internal radiative efficiency (IRE) at a higher excitation power. Preliminary measurement show an increase in Voc of at least 50 mV for randomly positioned microlenses on top of a dense NW array with 0.5 μm pitch.

Originele taal-2Engels
TitelPhysics, Simulation, and Photonic Engineering of Photovoltaic Devices XI
RedacteurenAlexandre Freundlich, Stephane Collin, Karin Hinzer
Aantal pagina's4
ISBN van elektronische versie9781510648630
StatusGepubliceerd - 2022
EvenementSPIE OPTO 2022 - Online/Virtual, San Francisco, Verenigde Staten van Amerika
Duur: 22 jan. 200228 feb. 2002

Publicatie series

NaamProceedings of SPIE
ISSN van geprinte versie0277-786X
ISSN van elektronische versie1996-756X


CongresSPIE OPTO 2022
Land/RegioVerenigde Staten van Amerika
StadSan Francisco


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