Structure and Luminescent Properties of Mechanochemically Obtained Mn2+-Doped Hybrid Perovskites CH3NH3PbHal3 (Hal = Cl, Br)

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Theoretical and Experimental Chemistry Pub Date : 2024-03-19 DOI:10.1007/s11237-024-09792-x

N. V. Konoshchuk, O. P. Rozovik, H. V. Fedorenko, V. G. Koshechko, V. D. Pokhodenko

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Abstract

A series of Mn²⁺ -doped hybrid perovskites MAPb_1-xMn_xHal₃ (MA = CH₃NH₃, Hal = Cl and Br in different ratios, x = 0.33, 0.5, 0.67, 0.8) was obtained for the first time by mechanochemical synthesis. It is shown that materials obtained retain the perovskite structure even at the highest content of manganese ions (x = 0.8), and their structural and optical characteristics are mainly determined by the Cl/Br ratio. It is established that dispersions in toluene and nanocomposite films in polystyrene exhibit the intense photoluminescence (PL) due to the formation of pseudo-2D nanoparticles as a result of the ultrasonic disintegration of powders in an organic solvent. It is shown that the PL spectra of dispersions and nanocomposite films based on MAPb_1–xMn_xCl₃ are characterized by the appearance of an additional emission band from Mn²⁺ ions in the red region of the spectrum, due to which it is possible to increase the PL quantum yield from 0.2% (for the undoped sample) to 6.3% (films) and 10.2% (dispersions).

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机械化学方法获得的掺杂 Mn2+ 的混合包光体 CH3NH3PbHal3（Hal = Cl，Br）的结构和发光特性

通过机械化学合成首次获得了一系列掺杂 Mn2+ 的混合包晶 MAPb1-xMnxHal3（MA = CH3NH3，Hal = Cl 和 Br，不同比例，x = 0.33、0.5、0.67、0.8）。结果表明，即使在锰离子含量最高（x = 0.8）的情况下，所获得的材料仍能保持包晶结构，其结构和光学特性主要取决于 Cl/Br 的比例。研究证实，甲苯中的分散体和聚苯乙烯中的纳米复合薄膜显示出强烈的光致发光（PL），这是由于粉末在有机溶剂中超声分解形成了伪二维纳米颗粒。研究表明，基于 MAPb1-xMnxCl3 的分散体和纳米复合薄膜的光致发光光谱的特点是在光谱的红色区域出现了 Mn2+ 离子的附加发射带，因此可以将光致发光量子产率从 0.2%（未掺杂样品）提高到 6.3%（薄膜）和 10.2%（分散体）。

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来源期刊

Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as: a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials; b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions; c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.