High-voltage monocrystalline Si photovoltaic minimodules based on poly-Si/SiOx passivating contacts for high-power laser power conversion

Hartenstein, Matthew B.; France, Ryan M.; Nemeth, William; Theingi, San; Page, Matthew; Agarwal, Sumit; Young, David L.; Stradins, Paul

doi:10.1016/j.solmat.2023.112286

Title: High-voltage monocrystalline Si photovoltaic minimodules based on poly-Si/SiO_x passivating contacts for high-power laser power conversion

Journal Article · 21 March 2023 · Solar Energy Materials and Solar Cells

DOI: https://doi.org/10.1016/j.solmat.2023.112286 · OSTI ID:1968233

^[1]; France, Ryan M. ^[2]; Nemeth, William ^[2]; Theingi, San ^[2]; Page, Matthew ^[2]; Agarwal, Sumit ^[1];

^[1];

^[1]

Colorado School of Mines, Golden, CO (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)

By using photovoltaic cells under high-intensity laser illumination, much higher photoconversion efficiencies are obtained than under the solar spectrum. Here we demonstrate a monocrystalline Si based minimodule to convert laser light into electricity using edge-illuminated Si "minicells" based on polysilicon on silicon oxide passivating contacts. Ten fully metallized devices were stacked in series and illuminated from the edge, creating a high-voltage, low-current minimodule that mitigates resistive and Auger-Meitner losses. The minimodule shows a high open-circuit voltage of >5 V when tested under 1-Sun illumination and >7 V at higher illumination intensities when tested with a flash simulator. The fill factor in these minimodules is limited by shunting at low illuminations but reaches a maximum of ~78% for higher illumination intensities >40 Suns (current density >1200 mA/cm²), indicating that the minimodules are not limited by series resistance up to 40 Suns. Under 1000 nm monochromatic light, we measure efficiencies >40% at > 40 Suns equivalent illumination, showing the potential of passivated contact Si cells for laser power conversion.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1968233

Report Number(s):: NREL/JA-5900-84602; MainId:85375; UUID:2a2335de-7749-4689-ad26-2c05e39dd8fa; MainAdminID:68359

Journal Information:: Solar Energy Materials and Solar Cells, Vol. 255; ISSN 0927-0248

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
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Title: High-voltage monocrystalline Si photovoltaic minimodules based on poly-Si/SiOx passivating contacts for high-power laser power conversion

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Title: High-voltage monocrystalline Si photovoltaic minimodules based on poly-Si/SiO_x passivating contacts for high-power laser power conversion