Crystal stabilization of α-FAPbI3 perovskite by rapid annealing method in industrial scale
Crystal stabilization of α-FAPbI3 perovskite by rapid annealing method in industrial scale
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DOI：
10.1016/j.jmrt.2021.03.107
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
G. Murugadoss;P. Arunachalam;S. Panda;M. Rajesh Kumar;J. Rajabathar;H. Al‐Lohedan;M. D. Wasmiah
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文献类型：
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作者：
G. Murugadoss;P. Arunachalam;S. Panda;M. Rajesh Kumar;J. Rajabathar;H. Al‐Lohedan;M. D. Wasmiah
有机-无机杂化甲脒碘化铅（FAPbI 3）钙钛矿在最近开发的光致发光和光电器件中显示出巨大的关注。然而，它遭受结构不稳定性的复杂性，特别是在室温下从深色光活性钙钛矿相（α-FAPbI 3）到黄色光非活性相（δ-FAPbI 3）的自发相变。为了稳定光活性α-FAPbI 3，采用了几种方法，包括组分工程，在表面上的2D层沉积和溶剂工程方法。在这篇文章中，我们提出了一种简单的顺序快速退火方法，以工业规模生产在室温下高度稳定的光活性α-FAPbI 3钙钛矿。采用X射线衍射（XRD）、紫外-可见吸收光谱、激光拉曼光谱、热重分析（TGA）、场发射电子显微镜和元素分析（FE-SEM & EDAX）等方法对样品的结构、形貌、组成和光学性质进行了研究。XRD中强的立方结构特征衍射峰表明，无添加剂的制备方法更适合于制备高质量的光电应用α-FAPbI 3钙钛矿。
Organic-inorganic hybrid formamidinium lead iodide (FAPbI3) perovskite has shown tremendous attention in recently developed photovoltaics and optelectronic devices. However, it suffers from structural instability complications, particularly the spontaneous phase transition from a dark color photoactive perovskite phase (α-FAPbI3) to a yellow color photo-inactive phase (δ-FAPbI3) at room temperature. To stabilize the photoactive α-FAPbI3, several methods were employed, including compositional engineering, 2D layer deposition on the surface, and solvent engineering method. In this communication, we have proposed a facile sequential rapid annealing method to produce the photoactive α-FAPbI3perovskite on an industrial scale, which is highly stable at room temperature. The structural, morphological, compositional, and optical properties of the perovskite were studied using X-ray diffraction (XRD), UV–visible absorption, Laser Raman, thermogravimetric analysis (TGA), and field emission electron microscopy with elemental analysis (FE-SEM & EDAX). The strong characteristic diffraction peaks of cubic structure in XRD showed the proposed additives free preparation method is more adaptable for the preparation of high quality α-FAPbI3perovskite for optoelectronic applications.