TubeSolar and the Centre for Solar Energy and Hydrogen Research Baden-Württemberg have achieved a power conversion efficiency of 14% for a photovoltaic film based on perovskite.
Germany's Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW) and Augsburg-based TubeSolar AG have achieved a power conversion efficiency of 14% for a perovskite-based photovoltaic film that TubeSolar developed.
TubeSolar uses the flexible photovoltaic film for its lightweight thin-film solar modules encapsulated in a glass tube. It said the film was fabricated with a roll-to-roll technology and slot-die coating, which is a coating process used for depositing thin and uniform films with limited material waste and low operational cost.
“The speed of the coating process was over one meter per minute,” the manufacturer said. “The partners' objective is to transfer the high efficiencies currently achieved in research on small areas to larger solar films and thus to commercialize slot die deposition as an industrially suitable coating method for flexible perovskite solar cells. By further optimising the solar cell layer stack and the absorber as well as the conductivity of the electrodes, the technology can be significantly improved even further.”
It said its products can be permeated by light and water for optimal plant growth and require simple, inexpensive mounting and assembly. The tubes offer partial shading to crops, as well as protection from heavy rain, hail and bird droppings. Tube Solar says their rounded surface also offers a self-cleaning aspect.
Tube Solar aims to expand its annual production capacity at Augsburg to 250 MW. The factory belonged to German multinational lighting company Osram, which previously owned some shares of the patent for TubeSolar's panels.
TubeSolar increased its share capital from €12 million ($12.2 million) to €13.2 million by issuing more shares in June.
“The expected proceeds from the capital increase a re to be used to finance the further growth of TubeSolar AG and in particular for investments in the development of the highly automated production of TubeSolar photovoltaic modules,” it said at the time.
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