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Title Performance Comparison of a Dye-Sensitized and a Silicon Solar Cell under Idealized and Outdoor Conditions
Author Jensen, Katrine Flarup
Supervisor Larsen, Esben (Electric Power Engineering, Department of Electrical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Lauritzen, Hanne (Danish Technological Institute)
Hinsch, Andreas (Fraunhofer-Institute for Solar Energy Systems ISE)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2008
Abstract The present thesis investigates the performance of a dye-sensitized solar cell (DSC) compared to a silicon solar cell under both idealized and outdoor conditions. Due to the fundamental difference in cell structure of the DSC and the silicon cell, different electrical behaviour under varying conditions is expected. An understanding of the cell behaviour with respect to the performance parameters: × Irradiance Intensity × Operating Cell Temperature × Incidence Angle is sought by experimental investigations and a following data analysis. The work in this thesis is strongly based on experiments as well as a comparison of results with theoretical relations about electrical behaviour. The experimental investigations have been carried out in the laboratory under controlled conditions and the influence of one performance parameter could be determined. The cells investigated show very different electrical behavior under varying conditions. The DSC exhibits highest conversion efficiency under low light conditions, whereas the highest conversion efficiency for silicon cells is seen at high irradiance. Under high irradiance, the DSC shows positive dependence to elevated operating temperatures, whereas the efficiency for the silicon cells is negatively proportional to cell temperature. A beneficial ISC-generation is seen for the DSC for increasing incidence angles which may be interpreted as the effect of increased light path within the active layers. The silicon cells exhibits a reduction in relative ISC for increasing incidence angles due to the increased reflection at the surface of the top-glass. Outdoor measurements were used to verify if the results achieved in the laboratory were visible under realistic operating conditions. Both the irradiance- and temperature influence as identified in the lab was seen in the outdoor measurements, but the beneficial behaviour of the DSC related to incidence angle was not observed. This might be interpreted as influence of the surface reflectance at the top-glass. As characterization parameters, the irradiance intensity and cell temperature are therefore seen to hold greatest importance for the cell performance for both DSC and silicon cells, but also the influence of incidence angle due to reflection is an influential parameter for cell performance.
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Admin Creation date: 2009-05-07    Update date: 2009-05-07    Source: dtu    ID: 242554    Original MXD