Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 34, Pages 28743-28749Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07780
Keywords
bilayered perovskite; air stability; mixed-dimensionality; phase separation; self-assembly
Funding
- Singapore National Research Foundation [NRF-CRP4-2008-03, NRF-CRP14-2014-03]
- MOE [RG166/16]
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In this manuscript we reveal the formation of bilayered hybrid perovskites of a new lower dimensional perovskite family, (CHMA)(2)(MA)(n-1)PbnI3 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.
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