Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Organic photovoltaics is an emerging solar power technologies which provide unique properties, such as transparency, flexibility, and rapid, roll to roll manufacture, opening the potential for unique niche applications. This work conducts a detailed techno-economic analysis of one such application, namely the photovoltaic greenhouse (figure 1), and discusses whether the unique properties of the technology can provide advantages over conventional photovoltaics. The potential for spectral selectivity within the choice of OPV materials is evaluated within the context of a photovoltaic greenhouse. The action spectrum of typical greenhouse crops is used to determine the impact on crop growth of blocking different spectral ranges from the crops. Transfer matrix modelling is used to assess the efficiency and spectrally resolved transparency of a variety of commercially available semi-conducting polymer materials as well as looking at the potential for designing an ideal polymer to maximise efficiency and crop growth. Whilst economic analysis suggests there could be a huge potential for OPV greenhouses if aggressive cost targets can be met, technical analysis shows a more pessimistic view. This shows that semi-transparent OPV devices may struggle to perform better than opaque crystalline silicon or even opaque flexible inorganic PV technology, stressing the importance of developing new, ultra-transparent electrode and interlayer materials, along with high efficiency, low band-gap active layers.
Schematics of the various approaches to PV greenhouses. (a) Partial shading with opaque cells or modules; (b) semi-transparent PV modules.
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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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