Volume 4, 2013
Topical issue: Photovoltaic Technical Conference (PVTC 2012)
|Number of page(s)||10|
|Published online||09 April 2013|
Feasibility of using thin crystalline silicon films epitaxially grown at 165 °C in solar cells: A computer simulation study
1 Indian Association for the Cultivation of Science, 700032 Kolkata, WB, India
2 Laboratoire de Physique des Interfaces et des Couches Minces, École Polytechnique, 91128 Palaiseau, France
3 Total S.A., Gas & Power – R&D Division, 92400 Courbevoie, France
Received: 27 July 2012
Accepted: 15 February 2013
Published online: 9 April 2013
We have previously reported on the successful deposition of heterojunction solar cells whose thin intrinsic crystalline absorber layer is grown using the standard radio frequency plasma enhanced chemical vapour deposition process at 165 °C on highly doped P-type (100) crystalline silicon substrates. The structure had an N-doped hydrogenated amorphous silicon emitter deposited on top of the intrinsic epitaxial silicon layer. However to form the basis of a solar cell, the epitaxial silicon film must be chiefly responsible for the photo-generated current of the structure and not the underlying crystalline silicon substrate. In this article we use detailed electrical-optical modelling to calculate the minimum thickness of the epitaxial silicon layer for this to happen. We have also investigated by modelling the influence of the a-Si:H/epitaxial-Si and epitaxial-Si/c-Si interface defects, the thickness of the epitaxial silicon layer and its volume defect density on cell performance. Finally by varying the input parameters and considering various light-trapping schemes, we show that it is possible to attain a conversion efficiency in excess of 13% using only a 5 micron thick epitaxial silicon layer.
© Chakraborty et al., published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.