Improvements in Photoluminescence Efficiency and Stability of CsPbBr3 Nanocrystals Through 3-Aminopropyltriethoxysilane Treatment

IF 2.9 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Seung-Beom Cho, Min-Jae Kim, Il-Kyu Park
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Abstract

A representative metal halide perovskite, CsPbX3, has received much attention for its high photoluminescence (PL) efficiency and broad emission spectral range covering ultraviolet to infrared. Even with the focused investigations, they still suffer from poor emission stability from surface-induced defects. The inherent instability of perovskites is caused by moisture in the ambient, which leads to a reduction in the luminescence efficiency and deterioration of emission stability. In this study, we report a method to annihilate the surface defects in CsPbBr3 nanocrystals (NCs), which enhances their photoluminescence efficiency by forming a SiOx shell structure using a 3-aminopropyltriethoxysilane (APTES). The APTES was treated during the synthesis of CsPbBr3 NCs through supersaturation and re-precipitation processes. The optical investigations confirmed that the PL intensity and emission stability of the CsPbBr3 NCs improved with the APTES treatment. The structural investigations using X-ray diffraction and transmission electron microscopy showed that optical analysis was carried out through photoluminescence and laser optical analysis using lasers at 400 nm and 365 nm wavelengths. These findings present an innovative solution to the instability issues of CsPbBr3 and suggest possibilities for its utilization in various application fields. Future research should focus on further understanding the scalability of this method and its practical applicability.

Abstract Image

通过 3-氨基丙基三乙氧基硅烷处理提高 CsPbBr3 纳米晶体的光致发光效率和稳定性
具有代表性的金属卤化物包晶 CsPbX3 因其较高的光致发光(PL)效率和涵盖紫外线到红外线的宽广发射光谱范围而备受关注。即使进行了重点研究,它们仍然存在因表面缺陷而导致的发射稳定性差的问题。环境中的水分会导致过氧化物晶石固有的不稳定性,从而导致发光效率降低和发射稳定性恶化。在本研究中,我们报告了一种湮灭 CsPbBr3 纳米晶体(NCs)表面缺陷的方法,该方法通过使用 3-aminopropyltriethoxysilane (APTES) 形成 SiOx 壳结构来提高其光致发光效率。在合成 CsPbBr3 NCs 的过程中,通过过饱和和再沉淀过程对 APTES 进行了处理。光学研究证实,经过 APTES 处理后,CsPbBr3 NCs 的聚光强度和发射稳定性都有所提高。使用 X 射线衍射和透射电子显微镜进行的结构研究表明,光学分析是通过光致发光和使用波长为 400 纳米和 365 纳米的激光器进行的激光光学分析来实现的。这些发现为解决 CsPbBr3 的不稳定性问题提供了一种创新的解决方案,并为其在各种应用领域的应用提供了可能性。未来的研究应侧重于进一步了解这种方法的可扩展性及其实际应用性。
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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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