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首页> 外文期刊>Nanotechnology >Highly efficient and stable 2D 3D perovskite solar cells fabricated by interfacial modification
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Highly efficient and stable 2D 3D perovskite solar cells fabricated by interfacial modification

机译：高效稳定的2D 3D Perovskite通过界面修饰制造的太阳能电池

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摘要

Two-dimensional (2D) perovskites, which have excellent stability compared with three=dimensional (3D) perovskites owing to the effective protection of the hydrophobic organic ligands, have become a research hotspot and have made great developmental progress in recent years. Herein, an n-butylammonium iodide (BAI) post-treatment process was developed to fabricate a 2D-3D hybrid perovskite with a thin layer of 2D perovskite covered on the surface of the 3D CH3NH3PbI3 perovskite. The growth process of 2D perovskite is formed through the chemical reaction between BAI and the residual PbI2, which improves stability and reduces the number of crystal defects of 3D perovskite by optimizing stoichiometry. Compared with the 3D counterpart, the 2D-3D hybrid perovskite shows outstanding light and air stability when exposed to external environments. Moreover, structure conversion from 3D to 2D-3D can induce the passivation of defects in the 3D films. The power conversion efficiency of the 2D-3D solar cell exceeds 18% and retains 80% of the initial value after more than 2000 h of storage without encapsulation.
机译：由于有效保护疏水性有机配体的有效保护，具有优异的稳定性，其具有优异的稳定性，其具有优异的稳定性，因此成为疏水性有机配体的有效保护，已成为研究热点，近年来取得了很大的发展进展。在此，开发了一种丁基氨基碘化物（Bai）后处理方法以制造2D-3D杂交钙钛矿，其具有薄于3D CH 3 NH 3 PB13PEROVSKITE的表面上的2D钙钛矿。通过Bai和残余PBI2之间的化学反应形成2D钙钛矿的生长过程，这通过优化化学计量来改善稳定性并降低3D钙钛矿的晶体缺陷的数量。与3D对应物相比，2D-3D Hybrid Perovskite在暴露于外部环境时显示出突出的光线和空气稳定性。此外，从3D到2D-3D的结构转换可以诱导3D膜中的缺陷的钝化。 2D-3D太阳能电池的功率转换效率超过18％，在没有封装的情况下超过2000小时的储存后保留初始值的80％。

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