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首页> 外文期刊>Advanced energy materials >Compositional and Solvent Engineering in Dion–Jacobson 2D Perovskites Boosts Solar Cell Efficiency and Stability
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Compositional and Solvent Engineering in Dion–Jacobson 2D Perovskites Boosts Solar Cell Efficiency and Stability

机译：Dion-Jacobson 2D钙钛矿中的成分和溶剂工程可提高太阳能电池的效率和稳定性

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摘要

Hybrid halide 2D perovskites deserve special attention because they exhibit superior environmental stability compared with their 3D analogs. The closer interlayer distance discovered in 2D Dion-Jacobson (DJ) type of halide perovskites relative to 2D Ruddlesden-Popper (RP) perovskites implies better carrier charge transport and superior performance in solar cells. Here, the structure and properties of 2D DJ perovskites employing 3-(aminomethyl)piperidinium (3AMP(2+)) as the spacing cation and a mixture of methylammonium (MA(+)) and formamidinium (FA(+)) cations in the perovskite cages are presented. Using single-crystal X-ray crystallography, it is found that the mixed-cation (3AMP)(MA(0.75)FA(0.25))(3)Pb4I13 perovskite has a narrower bandgap, less distorted inorganic framework, and larger Pb Symbol of the Klingon Empire I Symbol of the Klingon Empire Pb angles than the single-cation (3AMP)(MA)(3)Pb4I13. Furthermore, the (3AMP)(MA(0.75)FA(0.25))(3)Pb4I13 films made by a solvent-engineering method with a small amount of hydriodic acid have a much better film morphology and crystalline quality and more preferred perpendicular orientation. As a result, the (3AMP)(MA(0.75)FA(0.25))(3)Pb4I13-based solar cells exhibit a champion power conversion efficiency of 12.04% with a high fill factor of 81.04% and a 50% average efficiency improvement compared to the pristine (3AMP)(MA)(3)Pb4I13 cells. Most importantly, the 2D DJ 3AMP-based perovskite films and devices show better air and light stability than the 2D RP butylammonium-based perovskites and their 3D analogs.
机译：混合卤化物2D钙钛矿与3D类似物相比具有出色的环境稳定性，因此值得特别关注。相对于2D Ruddlesden-Popper（RP）钙钛矿，在2D Dion-Jacobson（DJ）型卤化物钙钛矿中发现的更近的层间距离意味着更好的载流子电荷传输和优异的太阳能电池性能。在这里，二维DJ钙钛矿的结构和性质采用3-（氨基甲基）哌啶鎓（3AMP（2+））作为间隔阳离子，并且甲基铵（MA（+））和甲ami（FA（+））阳离子的混合物。介绍了钙钛矿笼。使用单晶X射线晶体学，发现混合阳离子（3AMP）（MA（0.75）FA（0.25））（3）Pb4I13钙钛矿具有较窄的带隙，较少的扭曲的无机骨架和较大的Pb符号克林贡帝国I克林贡帝国的符号Pb角大于单阳离子（3AMP）（MA）（3）Pb4I13。此外，通过溶剂工程方法用少量氢碘酸制备的（3AMP）（MA（0.75）FA（0.25）（3）Pb4I13膜具有更好的膜形态和结晶质量，更优选的垂直取向。结果，基于（3AMP）（MA（0.75）FA（0.25））（3）Pb4I13的太阳能电池的主功率转换效率为12.04％，填充系数为81.04％，平均效率提高了50％与原始（3AMP）（MA）（3）Pb4I13细胞相比。最重要的是，基于2D DJ 3AMP的钙钛矿膜和器件比基于2D RP丁基铵的钙钛矿及其3D类似物具有更好的空气和光稳定性。

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