NDLI: Photolithography-free interdigitated back-contacted silicon heterojunction solar cells with efficiency >21%

Content Provider	IEEE Xplore Digital Library
Author	Tomasi, A. Paviet-Salomon, B. Lachenal, D. Martin de Nicolas, S. Ledinsky, M. Descoeudres, A. Nicolay, S. De Wolf, S. Ballif, C.
Copyright Year	2014
Description	Author affiliation: Photovoltaics & Thin-Film Electron. Lab., Ecole Polytech. Fed. de Lausanne (EPFL), Neuchatel, Switzerland (Tomasi, A.; Paviet-Salomon, B.; Martin de Nicolas, S.; Ledinsky, M.; De Wolf, S.; Ballif, C.) \|\| Roth&Rau Res. AG, Neuchatel, Switzerland (Lachenal, D.) \|\| PV-center, Centre Suisse d'Electron. et de Microtech. (CSEM), Neuchatel, Switzerland (Descoeudres, A.; Nicolay, S.)
Abstract	We report on the development of interdigitated back-contacted silicon heterojunction solar cells with conversion efficiencies well above 21%. Doped hydrogenated amorphous silicon layers, needed for electron and hole collection, are patterned via in-situ shadow masking whereas transparent conductive oxide and metal layers, of the back electrodes, are defined via hot melt inkjet printing of an etch resist and subsequent wet etching. Our technology is therefore photolithography-free and avoids any high-temperature step. The best fabricated solar cell presents a high short-circuit current density of 39.9 $mA/cm^{2},$ an open-circuit voltage of 724 mV and a fill factor of 74.5% resulting in a conversion efficiency of 21.5%, with a strong upside potential. We report also on a silver-free IBC-SHJ solar cell with conversion efficiency >20%.
Starting Page	3644
Ending Page	3648
File Size	437200
Page Count	5
File Format	PDF
e-ISBN	9781479943982
DOI	10.1109/PVSC.2014.6924898
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photovoltaic cells Silicon Heterojunctions Metals Computer architecture Fabrication Resists solar cells Amorphous silicon crystalline silicon heterojunctions photovoltaic cells
Content Type	Text
Resource Type	Article

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