Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Perovskite/Si multijunction solar cells have raised enormous attention within the PV research community in the last two years. The technology bears the potential to achieve power conversion efficiencies larger than 30%, thereby surpassing by far the power conversion efficiency of single junction Si solar cells. Two types of device architectures are commonly targeted: (i) mechanical stacking of perovskite top solar cell and Si bottom solar cell, called “4-terminal architecture”, and monolithic connection of both cells in series, called “2-terminal architecture”. Both concepts have distinct advantages and disadvantages related to the light harvesting. I.e. compared to the 4T architecture, the 2-terminal architecture benefits from less parasitic losses in a lower number of transparent electrodes but suffers from losses due to imperfect matching of the generated current in the perovskite top solar cell and Si bottom solar cell. In order to give advice which architecture is superior, we perform energy yield modelling in various climate conditions. Our results clearly indicate that the for state-of-the-art perovskite top cell architectures, the energy yield of the perovskite/Si multijunction solar cells will still be lower compared to the single junction Si solar cells only. However, if optical losses due to parasitic reflection at the front side and parasitic absorption in the transparent electrodes will be reduced, the 4-terminal perovskite/Si solar cells have great potential to significantly outperform Si single junction solar cells. Interestingly, the 2-terminal architecture shows a much lower energy yield compared to the 4-terminal architecture, due to the poor response to diffuse light and incident light out of normal incidence.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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