Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO20)
Publication date: 25th November 2019
Organic-inorganic hybrid perovskite materials have explored quite extensively for their optical and photovoltaic properties since the discovery of lead halide perovskite as light absorber in solar cells.[1] The research was mainly focused on optimizing the surface morphology, defect management in the perovskites and improving the stoichiometry of perovskite composition to achieve the solar cells with power conversion efficiencies above 22%.[2-5] Despite all these extensive efforts, the hybrid perovskite solar cells still suffer stability issues and are highly sensitive to humidity. This issue can be tackled by passivating the conventional 3D perovskite with a 2D perovskite layer to improve the longevity of the solar cells. The presence of the long chain organic cations in the inorganic framework helps in preventing the water molecules to diffuse through the 2D layer and damaging the 3D perovskite. In this work, some long chain organic cations are proposed which can help in improving the solar cell performance and stability of the hybrid lead halide perovskite solar cells.
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