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High-efficiency silicon heterojunction solar cells: From physics to production lines

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21 Author(s)
De Wolf, S. ; Photovoltaics & Thin Film Electron. Lab., Ecole Polytech. Fed. de Lausanne (EPFL), Neuchâtel, Switzerland ; Andrault, Y. ; Barraud, L. ; Bartlome, R.
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Silicon heterojunction technology (Si-HJT) consists of thin amorphous silicon layers on monocrystalline silicon wafers and allows for photovoltaic solar cells with energy-conversion efficiencies above 20%, also at industrial-production level. This article reports how this may be achieved. First, we focus on the surface-passivation mechanism of intrinsic and doped amorphous silicon films in such solar cells, enabling record-high values for the open-circuit voltage. Next, the industrial upscaling in large-area reactors of such film deposition is discussed, including the fabrication of solar cells with energy-conversion efficiencies as high as 21%.

Published in:

Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on

Date of Conference:

1-4 Nov. 2010