In this manuscript we reveal the formation of bilayered hybrid perovskites of a new lower dimensional perovskite family, (CHMA)2(MA)n−1PbnI3 with n = 1–5, with high ambient stability via its crystallization driven self-assembly process. The spun-coated perovskite solution tends to crystallize and undergo phase separation during annealing, resulting in the formation of 2D/3D bilayered hybrid perovskites.
Remarkably, this 2D/3D hybrid perovskites possess striking moisture resistance and displays high ambient stability up to 65 days. The bilayered approach in combining 3D and 2D perovskites could lead to a new era of perovskite research for high-efficiency photovoltaics with outstanding stability, with the 3D perovskite providing excellent electronic properties while the 2D perovskite endows it moisture stability.
Koh, T.M., Huang, J., Neogi, I., Boix, P.P., Mhaisalkar, S.G. and Mathews, N., 2017. High stability bilayered perovskites through crystallization driven self-assembly. ACS Applied Materials & Interfaces, 9(34), pp.28743-28749.
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Categories: Solar & Photovoltaics