Abstract
Semi-empirical computer modelling is used to investigate spectral matching in tandem and triple-junction thin film silicon solar cells. In amorphous/microcrystalline silicon (a-Si:H/μc-Si:H) tandem cells, current mis-match is offset by an increase in fill-factor, resulting in a broad peak in efficiency versus average photon energy. For a-Si:H/a-Si:H tandem cells, photo-generated currents in both sub-cells increase with increasing average photon energy, and efficiency is predicted to increase monotonically over a wide spectral range. a-Si:H/a-Si:H/μc-Si:H triple cells exhibit spectral behaviour similar to a-Si:H/μc-Si:H tandem cells, but with a smaller fill-factor dependence. Variations in spectral quality are predicted to account for only a small reduction in annual electrical energy yield, of some 2 to 4%.
Original language | English |
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Article number | 012025 |
Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Journal of Physics: Conference Series |
Volume | 794 |
Issue number | 1 |
DOIs | |
Publication status | Published - 22 Feb 2017 |
Event | 19th International School on Condensed Matter Physics - Sv. Konstantin, Varna, Bulgaria Duration: 29 Aug 2016 → 2 Sept 2016 http://iscmp.issp.bas.bg/index.php (Link to Conference website) |