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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Structural investigation of co-evaporated methyl ammonium lead halide perovskite films during growth and thermal decomposition using different PbX2 (X = I, Cl) precursors
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Structural investigation of co-evaporated methyl ammonium lead halide perovskite films during growth and thermal decomposition using different PbX2 (X = I, Cl) precursors

机译：使用不同的PbX2（X = I，Cl）前体在生长和热分解过程中共蒸发的甲基铵卤化铅钙钛矿薄膜的结构研究

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摘要

While the progress in device development of perovskite solar cells is rapidly evolving, details of the film formation and the interplay of processing parameters, structural and compositional properties of deposited phases and their stability are still under dispute. Here we present a detailed structural analysis of methylammonium lead halide (I, Cl) films by in situ X-ray diffraction during their growth and thermal recrystallization up to their decomposition. MAPbI(3) films grown by co-evaporating MAI and PbI2 are compared to MAPbI(3)(Cl) films derived from an evaporation route using MAI and PbCl2 precursors. The main differences observed between the two routes are varying crystal structures at room temperature and differently limited process windows, but similar overall growth, recrystallization and decomposition features. The preferential orientation of the pure MAPbI(3) is shown to depend on the applied molar precursor flux ratio and can additionally be modified by thermal annealing.
机译：尽管钙钛矿太阳能电池的器件开发进展迅速，但是成膜的细节以及工艺参数，沉积相的结构和组成特性以及它们的稳定性之间的相互作用仍然存在争议。在这里，我们通过原位X射线衍射在其生长和热重结晶直至分解之前，对甲基铵卤化铅（I，Cl）膜进行了详细的结构分析。将通过共蒸发MAI和PbI2而生长的MAPbI（3）膜与使用MAI和PbCl2前体的蒸发途径得到的MAPbI（3）（Cl）膜进行了比较。两种途径之间观察到的主要差异是室温下晶体结构的变化和有限的工艺窗口，但总体生长，重结晶和分解特征相似。已显示纯MAPbI（3）的优先方向取决于所施加的摩尔前体通量比，并且可以通过热退火进行额外的修改。

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