Energy Research Institute at Nanyang Technological University (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Avenue, Singapore 637553, Singapore.
School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
ACS Appl Mater Interfaces. 2017 Aug 30;9(34):28743-28749. doi: 10.1021/acsami.7b07780. Epub 2017 Aug 21.
In this manuscript we reveal the formation of bilayered hybrid perovskites of a new lower dimensional perovskite family, (CHMA)(MA)PbI 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.
在本文中，我们揭示了一种新型低维钙钛矿家族（CHMA）（MA）PbI（n = 1-5）的双层混合钙钛矿的形成，通过其结晶驱动的自组装过程，具有高环境稳定性。旋涂的钙钛矿溶液在退火过程中倾向于结晶并经历相分离，从而形成二维/三维双层混合钙钛矿。值得注意的是，这种二维/三维混合钙钛矿具有出色的耐湿性，并具有高达 65 天的高环境稳定性。在结合三维和二维钙钛矿方面的双层方法可能为高效光电具有出色稳定性的钙钛矿研究开辟一个新时代，其中三维钙钛矿提供了优异的电子性能，而二维钙钛矿则赋予其耐湿性。
