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%.
|Number of pages||6|
|Journal||Journal of Physics: Conference Series|
|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)