4 years ago

High Stability Bilayered Perovskites through Crystallization Driven Self-Assembly

High Stability Bilayered Perovskites through Crystallization Driven Self-Assembly
Nripan Mathews, Pablo P. Boix, Ishita Neogi, Junye Huang, Teck Ming Koh, Subodh G. Mhaisalkar
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.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b07780

DOI: 10.1021/acsami.7b07780

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