CsPbBr3及聚甲基丙烯酸甲酯-CsPbBr3薄膜的环保合成及稳定性分析。

IF 2.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nanotechnology Pub Date : 2025-03-18 DOI:10.1088/1361-6528/adbbf6

You-Lin Huang, Wei Li, Fuqian Yang

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引用次数: 0

摘要

本研究提出了一种环保的机械化学（MC）方法合成溴化铯铅（CsPbBr3），消除了有机溶剂和高温的需要。将合成的CsPbBr3粉末用于制备聚甲基丙烯酸甲酯(PMMA)-CsPbBr3薄膜和CsPbBr3纳米晶（nc）。CsPbBr3粉末、PMMA-CsPbBr3薄膜和CsPbBr3 NCs的发光峰分别以541 nm、538 nm和514 nm为中心，晶体尺寸分别为0.96、0.56和0.12 μm。PL寿命分析表明，CsPbBr3粉末、PMMA-CsPbBr3薄膜和CsPbBr3 NCs的衰减时间τ_1，τ_2分别为（4.18,20.08）、（5.7,46.99）和（5.81,23.14），单位为（ns, ns）。CsPbBr3 NCs在甲苯中的PLQY为61.3%。热淬火的热活化能分别为217.48 meV（薄膜）和178.15 meV（粉末），表明PMMA包封提高了热稳定性。水在PMMA- cspbbr3薄膜中扩散的PL衰减分析得出水的扩散系数为1.70 × 10^-12 m2/s，与纯PMMA中的水扩散系数相当。这项工作展示了一种可扩展的、可持续的CsPbBr3合成和光电应用稳定性增强策略。

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Eco-friendly synthesis and stability analysis of CsPbBr₃and poly(methyl methacrylate)-CsPbBr₃films.

This study presents an eco-friendly mechanochemical synthesis of cesium lead bromide (CsPbBr₃), eliminating the need of organic solvents and high temperatures. The synthesized CsPbBr₃powder is used to fabricate poly(methyl methacrylate) (PMMA)-CsPbBr₃films and CsPbBr₃nanocrystals (NCs). The photoluminescence (PL) peaks of the emission light are centered at 541 nm, 538 nm, and 514 nm for the CsPbBr₃powder, PMMA-CsPbBr₃films, and CsPbBr₃NCs, respectively, correlating with crystal sizes of 0.96, 0.56, and 0.12μm, respectively. The PL lifetime analysis reveals decay times (τ1,τ2) of (4.18, 20.08), (5.7, 46.99), and (5.81, 23.14) in the units (ns, ns) for the CsPbBr₃powder, PMMA-CsPbBr₃films, and CsPbBr₃NCs, respectively. The PL quantum yield of the CsPbBr₃NCs in toluene is 61.3%. Thermal activation energies for thermal quenching are 217.48 meV (films) and 178.15 meV (powder), indicating improved thermal stability with the PMMA encapsulation. The analysis of the PL intensity decay from water diffusion in the PMMA-CsPbBr₃films yields 1.70 × 10^-12m²s^-1for the diffusion coefficient of water, comparable to that for water diffusion in pure PMMA. This work demonstrates a scalable, sustainable strategy for CsPbBr₃synthesis and stability enhancement for optoelectronic applications.

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来源期刊

Nanotechnology 工程技术-材料科学：综合

CiteScore

7.10

自引率

5.70%

发文量

820

审稿时长

2.5 months

期刊介绍： The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.