login E-MAIL: PASSWORD: Forgot your password?

Browse topics

Document details

Show tagged papers | Back to overview |
Spectrally Dependent Optimization of Multi-Junction Solar Cells
Today’s multi-junction solar cell optimization aims at high conversion efficiencies under a standard spectrum. However, depending on the local conditions at the outdoor location this standardized spectrum may not be the optimum. A resulting current mismatch of a series-connected multi-junction solar cell involves losses in the annual yield. We investigate the issue of spectral dependence of the output power of an amorphous silicon-/ microcrystalline silicon (a-Si:H/μc-Si:H) tandem in non-tracked mode on the local spectral conditions. The surprising result is that the optimum junction thicknesses overlap in a wide range for 99 % of the maximum power under the standard AM 1.5g spectrum and for 99 % of the maximum annual yield at both investigated locations. However, a top limitation is predicted to be advantageous for the optimum yield.
C. Ulbrich, T. Kirchartz, K. Ding, B.E. Pieters, A. Gerber, U. Rau
Multijunction Solar Cell, Tandem, Energy Performance
Thin Films Solar Cells
Subtopic: Amorphous and Microcrystalline Silicon Solar Cells
Event: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany
Session: 3CO.12.3
2386 - 2389
ISBN: 3-936338-25-6
Paper DOI: 10.4229/24thEUPVSEC2009-3CO.12.3
0,00 EUR
Document(s): paper