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Amorphous-crystalline silicon heterojunction solar cells formed by the DC saddle field PECVD system: A deposition parameter optimization

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8 Author(s)
Leong, K.R. ; Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada ; Gougam, A.B. ; Bahardoust, B. ; Wing Yin Kwong
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The DC Saddle Field PECVD system was used to deposit hydrogenated amorphous silicon (a-Si:H) layers for high efficiency amorphous-crystalline silicon heterojunction (ACSHJ) solar cells. The plasma controlling parameters; including the chamber pressure, gas phase dopant concentration for the p-type a-Si:H (a-Si:H(p+)) emitter, and substrate temperature were varied. The substrate temperature was found to be a critical parameter for the deposition of intrinsic a-Si:H as epitaxial formation can occur with just a temperature increase of 10°C. The processing capabilities have been developed to construct ACSHJ solar cells with 15.5% conversion efficiency for a 4.2 cm2 area.

Published in:

Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE

Date of Conference:

19-24 June 2011