New Synthetic Route of Ultrapure Alkylammonium Iodides for Perovskite Thin Films of Superior Optoelectronic Properties,Energy Technology

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New Synthetic Route of Ultrapure Alkylammonium Iodides for Perovskite Thin Films of Superior Optoelectronic Properties
Energy Technology ( IF 3.6 ) Pub Date : 2020-08-19 , DOI: 10.1002/ente.202000478
Shyantan Dasgupta _{1,

2} , Kasjan Misztal _{1,

3} , Rosinda Fuentes Pineda ₃ , Wojciech Mróz ₄ , Łukasz Pawlaczyk ₅ , Jarosław Serafińczuk _{5,

6} , Alex J. Barker ₄ , Taimoor Ahmad ₃ , Artur P. Herman ₇ , Sylvester Sahayaraj ₁ , Robert Kudrawiec ₇ , Annamaria Petrozza ₄ , Alina Dudkowiak ₂ , Konrad Wojciechowski _{1,

3}

Affiliation

In the past decade, metal halide perovskites grew from a mere scientific sensation to a tangible photovoltaic technology, being on the brink of commercial entrance. Certified efficiency value reported for these devices exceeded 25%. However, there still remains a large scope for further advancement, particularly in better understanding of the formation process of polycrystalline thin films of these materials. Insight into the interplay between colloidal precursor solution and nucleation of perovskite crystallites is highly desirable to obtain well‐controlled crystallization process, essential for reproducible manufacturing at large scale. Herein, a novel synthetic route of methylammonium iodide (CH₃NH₃I, MAI) is reported, which produces ultrapure material with a cheap and simple method. MAI prepared this way obtains better control over the perovskite precursor colloidal solution. Furthermore, MAPbI₃ perovskite layers processed from solutions are formulated with different MAI powders, and these films are applied into a simple planar heterojunction solar cell stack. Through photovoltaic performance characterization and multiple spectroscopic measurements, superior optoelectronic properties of samples made with an optimized solution are demonstrated. The influence of a precursor solution and its colloidal distribution on the final film properties is reported. The reported synthetic protocol is also applicable to other alkylammonium iodides.

中文翻译：

具有优异光电性能的钙钛矿薄膜超纯烷基碘化碘的合成新途径

在过去的十年中，金属卤化物钙钛矿已从单纯的科学感发展为有形的光伏技术，正处于商业进入的边缘。报告的这些设备的认证效率值超过25％。但是，特别是在更好地理解这些材料的多晶薄膜的形成过程方面，还有很大的发展空间。为了获得可控的结晶过程，这对于大规模可重复生产必不可少的，非常需要了解胶体前体溶液和钙钛矿微晶成核之间的相互作用。本文介绍了一种新的甲基碘化甲烷（CH ₃ NH ₃据报道，I，MAI，其以便宜且简单的方法生产超纯材料。用这种方法制备的MAI可更好地控制钙钛矿前体胶体溶液。此外，用不同的MAI粉末配制从溶液中加工得到的MAPbI ₃钙钛矿层，并将这些膜应用于简单的平面异质结太阳能电池堆中。通过光伏性能表征和多光谱测量，展示了使用优化溶液制备的样品的卓越光电性能。报道了前体溶液及其胶体分布对最终膜性能的影响。报道的合成方案也适用于其他烷基碘化铵。

更新日期：2020-10-05

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