Enhancing Stability of Microwave-Synthesized Cs2SnxTi1-xBr6 Perovskite by Cation Mixing.

IF 7.5 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ChemSusChem Pub Date : 2024-12-10 DOI:10.1002/cssc.202402073
Emmanuel Reyes-Francis, Beatriz Julián-López, Carlos Echeverría-Arrondo, Jhonatan Rodríguez-Pereira, Diego Esparza, Tzarara López-Luke, Jaime Espino-Valencia, Daniel Prochowicz, Iván Mora-Seró, Silver-Hamill Turren-Cruz
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引用次数: 0

Abstract

The double-perovskite material Cs2TiBr6 shows excellent photovoltaic potential, making it a promising alternative to lead-based materials. However, its high susceptibility to degradation in air has raised concerns about its practical application. This study introduces an interesting synthesis approach that significantly enhances the stability of Cs2TiBr6 powder. We implemented a gradual cation exchange process by substituting Ti4+ with Sn4+ in the efficient microwave-assisted synthesis method, developing a double perovskite Cs2SnxTi1-xBr6 type. A systematic study of increasing concentration of Sn4+ in Cs2TiBr6 perovskite has been performed to analyze the effect of Sn-doping degree on the chemical and thermal stability of the material and the optical features in both nitrogen and ambient atmospheres, significantly increasing the stability of the material in the air for over a week. Furthermore, introducing Sn4+ results in a more uniform polygonal crystal morphology of the powders and a slight band gap broadening. We show that microwave-assisted synthesis is highly efficient and cost-effective in producing more sustainable lead-free perovskite materials with enhanced stability and desirable electrical characteristics. This work suggests a promising method for synthesizing perovskite materials, opening new routes for scientific research and applications.

阳离子混合增强微波合成Cs2SnxTi1-xBr6钙钛矿的稳定性。
双钙钛矿材料Cs2TiBr6显示出优异的光伏潜力,使其成为铅基材料的有希望的替代品。然而,它在空气中极易降解,这引起了人们对其实际应用的担忧。本研究介绍了一种有趣的合成方法,可以显著提高Cs2TiBr6粉末的稳定性。在微波辅助合成的方法中,我们采用Sn4+取代Ti4+,实现了渐进的阳离子交换过程,得到了双钙钛矿Cs2SnxTi1-xBr6型。系统研究了Cs2TiBr6钙钛矿中Sn4+浓度的增加,分析了sn掺杂程度对材料在氮气和环境气氛中的化学稳定性和热稳定性以及光学特性的影响,显著提高了材料在空气中的稳定性,持续时间超过一周。此外,Sn4+的引入使粉末的多角形晶体形貌更加均匀,带隙也有轻微的展宽。我们表明,微波辅助合成在生产更具可持续性的无铅钙钛矿材料方面是高效和经济的,具有增强的稳定性和理想的电学特性。这项工作为钙钛矿材料的合成提供了一种有前途的方法,为科学研究和应用开辟了新的途径。
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来源期刊
ChemSusChem
ChemSusChem 化学-化学综合
CiteScore
15.80
自引率
4.80%
发文量
555
审稿时长
1.8 months
期刊介绍: ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology
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