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Perovskite Solar Cells: Developing a simple, fast and low-cost Fabrication Technology
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Solar energy is the most abundant renewable resource and is regarded as the most promising for the sustainability of our society. Perovskites are a class of semiconductor materials with unique properties since they allow films fabrication with high electronic quality using non-vacuum solution techniques. Therefore, such materials are interesting for a wide range of opto-electronic applications. Perovskites allow rapid, simple and low-cost solar cell manufacturing, being nowadays considered the most promising material to compete with silicon in photovoltaics technology. However, the production of homogeneous MAPbI3 films by Spin Coating is challenging, as it requires precise control of several factors that influence the films’ properties. In this work, the influence of the main deposition parameters on the MAPbI3 thin films manufacture was studied to find the best processing conditions that enable obtaining films as homogeneous and uniform as possible. This allowed attaining MAPbI3 polycrystalline films with state-of-art quality, having grain sizes between 3 and 13 μm and UV-Visible absorption of 85-90 %. The remaining layers (i.e. selective contacts) of the Perovskite cell structure were investigated as well, allowing the fabrication of sets of full solar cells with a maximum VOC of 0.77 V and JSC of 7.65 mA.cm-2.
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Photovoltaics Perovskite Solar Cells Spin Coating Polycrystalline Thin Films Selective Contacts