Ferroelectricity and Crystal Phases in Mixed-Cation Lead Iodide Perovskite Solar Cells,Solar RRL

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Ferroelectricity and Crystal Phases in Mixed-Cation Lead Iodide Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2022-09-29 , DOI: 10.1002/solr.202200808
Alexander Deniz Schulz _{1,

2} , Max Oliver Schmitt ₁ , Moritz Braun ₃ , Alexander Colsmann _{1,

2} , Manuel Hinterstein ₃ , Holger Röhm _{1,

2}

Affiliation

After the discovery of ferroelectricity in archetypal methylammonium lead iodide (MAPbI₃), the discussion arose, if more advanced derivatives thereof are also ferroelectric and to what extent the polar domains mitigate detrimental charge carrier recombination in perovskite solar cells. Herein, the A-site cation methylammonium is gradually substituted with formamidinium and cesium. The domain contrast measured by piezoresponse force microscopy is correlated with the distortion of the crystal structure measured by X-ray diffraction. By Rietveld analysis, a detailed structural model together with texture information is determinded, which reveals an intriguing interplay between lead iodide and the perovskite phases. Finally, the bearing of ferroelectric domains in mixed-cation perovskites on the solar cell performance is discussed.

中文翻译：

混合阳离子碘化铅钙钛矿太阳能电池中的铁电性和晶相

_{在原型甲基铵碘化铅 (MAPbI 3)}中发现铁电性后），讨论出现了，如果其更先进的衍生物也是铁电的，以及极性域在多大程度上减轻了钙钛矿太阳能电池中有害的载流子复合。在此，A位阳离子甲基铵逐渐被甲脒和铯取代。通过压电响应力显微镜测量的域对比度与通过 X 射线衍射测量的晶体结构的变形相关。通过 Rietveld 分析，确定了详细的结构模型和纹理信息，揭示了碘化铅和钙钛矿相之间有趣的相互作用。最后，讨论了混合阳离子钙钛矿中铁电畴对太阳能电池性能的影响。

更新日期：2022-09-29

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