Steric hindrance driven passivating cations for stable perovskite solar cells with an efficiency over 24%
文献情報
Kasparas Rakstys, Jianxing Xia, Yi Zhang, Kotryna Siksnelyte, Andre Slonopas, Paul J. Dyson, Vytautas Getautis, Mohammad Khaja Nazeeruddin
In this work, a series of passivating salts for perovskite solar cells (PSCs) based on ortho-methylammonium iodide functional units are molecularly engineered to study the steric hindrance driven passivation effect. The incorporation of fluorine atoms into passivating agents has been found to be beneficial not only for maximized defect passivation effect, ensuring improved charge transport, but also for significantly enhanced hydrophobicity of the perovskite film, leading to enhanced device stability. The highest power conversion efficiency (PCE) of over 24% has been achieved for surficial passivated PSCs based on fluorinated cation PFPDMAI2. Importantly, long-term operational stability over 1500 h is demonstrated showing the great prospect of a simple passivation strategy forming a thin organic halide salt layer instead of a 2D perovskite layer on the surface.
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Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment












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