<br>芳烷基胺对通过改进的 LARP 方法形成杂化 CsPbBr3 纳米晶体的影响,Nanoscale Advances

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芳烷基胺对通过改进的 LARP 方法形成杂化 CsPbBr3 纳米晶体的影响
Nanoscale Advances ( IF 4.6 ) Pub Date : 2024-02-06 , DOI: 10.1039/d3na01105d
Ernest Ruby ₁ , Hugo Levy-Falk ₁ , Gaëlle Trippé-Allard ₁ , Frédéric Fossard ₂ , Maxime Vallet _{3,

4} , Nicolas Guiblin ₃ , Jean-Sébastien Lauret ₁ , Emmanuelle Deleporte ₁ , Cédric R Mayer ₁

Affiliation

钙钛矿纳米晶由于其不同的应用，特别是在光伏领域和LED性能方面，在过去十年中引起了广泛的关注。在这个钙钛矿纳米晶体大家族中，CsPbBr ₃纳米晶体是颇具吸引力的纳米材料，因为它们是获得绿色排放和探索新合成路线的良好候选材料。在这种情况下，控制纳米尺度的形态，特别是尺寸和单分散性，是探索其光物理性质和最终应用的基础。目前，在使用热注射（HI）或配体辅助再沉淀（LARP）方法时，纳米晶体的纳米尺寸是通过油酸和油胺分子的存在来确保的。如果油酸发挥基础作用，油胺可以很容易地被其他氨基分子取代，为CsPbBr ₃纳米晶体的功能化和获得新的杂化钙钛矿纳米晶体家族开辟道路。在本文中，我们描述了通过软化学通过改进的 LARP 方法合成一类新的有机-无机杂化 CsPbBr ₃纳米晶体，并由芳基烷基胺 (AAA) 分子功能化。我们重点介绍了使用剪刀等芳基烷基胺分子将亚微米晶体切割成纳米晶体的机制。这些氨基分子对最终纳米晶体的影响导致不同的纳米晶体形态（纳米立方体、纳米片或纳米棒）和结构（单斜晶、菱面体或四方晶）。此外，这种改进的 LARP 方法突出显示，在某些实验条件下，PbO 带的意外形成。

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Influence of arylalkyl amines on the formation of hybrid CsPbBr3 nanocrystals via a modified LARP method

Perovskite nanocrystals have attracted much attention in the last ten years due to their different applications, especially in the photovoltaic domain and LED performance. In this large family of perovskite nanocrystals, CsPbBr₃ nanocrystals are attractive nanomaterials because they are good candidates for obtaining green emissions and exploring new synthesis routes. In this context, controlling the nanometric scale's morphology, particularly the size and monodispersity, is fundamental for exploring their photophysical properties and final applications. Currently, the nanometric size of nanocrystals is ensured by the presence of oleic acid and oleylamine molecules, in using Hot Injection (HI) or ligand-assisted reprecipitation (LARP) methods. If oleic acid plays a fundamental role, oleylamine can be easily substituted by other amino molecules, opening the way for the functionalization of CsPbBr₃ nanocrystals and the obtention of new hybrid perovskite nanocrystal families. In this article, we describe the synthesis, by soft chemistry, of a new family of hybrid organic–inorganic CsPbBr₃ nanocrystals, functionalized by aryl-alkylamine (AAA) molecules, through the modified LARP method. We highlight the mechanism for cutting submicron crystals into nanocrystals, using aryl-alkylamine molecules like scissors. The impact of these amino molecules on the final nanocrystals leads to different nanocrystal morphologies (nanocubes, nanosheets, or nanorods) and structures (monoclinic, rhombohedral, or tetragonal). In addition, this modified LARP method highlights, under certain experimental conditions, an unexpected formation of PbO ribbons.

更新日期：2024-02-06

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