Belich Nikolai A, Petrov Andrey A, Rudnev Pavel O, Stepanov Nikita M, Turkevych Ivan, Goodilin Eugene A, Tarasov Alexey B
Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, 1 Lenin Hills, 119991 Moscow, Russia.
National Institute of Advanced Industrial Science and Technology (AIST), 305-8568 Tsukuba, Japan.
ACS Appl Mater Interfaces. 2020 May 6;12(18):20456-20461. doi: 10.1021/acsami.0c02492. Epub 2020 Apr 22.
Solutions of methylammonium and formamidinium polyhalides (AX, A = MA, FA, X = I, Br) in isopropanol are introduced as novel versatile precursors for the fabrication of APbX hybrid perovskite thin films via oxidation of metallic Pb. The polyhalide solution with adjustable reactivity is distributed over a metallic Pb layer followed by iodine vapor postprocessing to tune the morphology and composition of the film using only the elements inherently present in the perovskite. This method is easily reproducible in any materials science laboratory with equipment commonly used for perovskite solar cell fabrication and resulted in power conversion efficiencies of 16.2 and 17.2% for planar solar cells using MAPbI and MAFAPbIBr perovskites, respectively, as a proof of concept. Implementation of metallic lead thin films as the single Pb-containing precursors reduces a number of in-lab handling hazards compared to classical PbI powder and solutions and provides a variety of scalable deposition options.
甲铵和甲脒多卤化物（AX，A = MA，FA，X = I，Br）在异丙醇中的溶液被作为新型通用前驱体引入，用于通过金属Pb的氧化制备APbX混合钙钛矿薄膜。具有可调反应活性的多卤化物溶液分布在金属Pb层上，随后进行碘蒸汽后处理，以仅使用钙钛矿中固有存在的元素来调整薄膜的形貌和组成。这种方法在任何材料科学实验室中都很容易通过用于钙钛矿太阳能电池制造的常用设备进行重现，并且作为概念验证，使用MAPbI和MAFAPbIBr钙钛矿的平面太阳能电池的功率转换效率分别达到了16.2%和17.2%。与传统的PbI粉末和溶液相比，使用金属铅薄膜作为单一含Pb前驱体减少了许多实验室操作危险，并提供了多种可扩展的沉积选择。
