Structural reconstruction synthesis of highly luminous water-stable CsPbBr3@CsPb2Br5@DSPE core-shell perovskite nanocrystals for bioimaging, pattering, and LEDs

IF 11.2 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science & Technology Pub Date : 2024-10-24 DOI:10.1016/j.jmst.2024.09.041
Jiejun Ren, Longyun Liu, Fan Liu, Huiping Liu, Xiaopeng Zhou, Gen Li, Liangjun Chen, Guoping Yan, Yuhua Wang
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Abstract

Lead halide perovskite (LHP) nanocrystals (NCs) suffer from poor stability against environmental factors (heat, moisture, oxygen, etc.), which seriously hinders their practical application. Constructing a core-shell structure could be an effective approach to improve the stability and optical properties of the LHP NCs. Herein, a novel strategy of water-triggered phase transformation and phospholipid (DSPE) micelle encapsulation is proposed, generating highly luminescent water-dispersed CsPbBr3@CsPb2Br5@DSPE core-shell-shell nanocrystals. The epitaxial growth of the CsPb2Br5 shell is induced by the in-situ reconstruction of the CsPbBr3 surface by water erosion, and the lattice mismatch with the CsPbBr3 core is small (3.8%). The further amphipathic phospholipid encapsulation guarantees their excellent water dispersity and stability. Revealed by the femtosecond transient absorption spectroscopy, the dense CsPb2Br5@DSPE shell effectively passivates the surface of the CsPbBr3 core, thus improving its stability and luminescence performance. The resulting CsPbBr3@CsPb2Br5@DSPE nanoparticles exhibit excellent performance as fluorescent probes for bioimaging, aqueous inks for high-resolution pattering, and light conversion layers for LEDs, demonstrating their promising potential in multiple applications.

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用于生物成像、图案化和 LED 的高亮度水稳 CsPbBr3@CsPb2Br5@DSPE 核壳包晶石纳米晶体的结构重构合成
卤化铅过氧化物(LHP)纳米晶体(NCs)对环境因素(热、湿、氧等)的稳定性较差,严重阻碍了其实际应用。构建核壳结构是提高 LHP NCs 稳定性和光学性能的有效方法。本文提出了一种水触发相变和磷脂(DSPE)胶束封装的新策略,生成了高发光的水分散 CsPbBr3@CsPb2Br5@DSPE 核壳纳米晶体。CsPb2Br5 外壳的外延生长是由水侵蚀原位重构 CsPbBr3 表面引起的,与 CsPbBr3 内核的晶格失配很小(3.8%)。两亲磷脂的进一步封装保证了其优异的水分散性和稳定性。飞秒瞬态吸收光谱显示,致密的 CsPb2Br5@DSPE 外壳有效地钝化了 CsPbBr3 内核的表面,从而提高了其稳定性和发光性能。由此制备的 CsPbBr3@CsPb2Br5@DSPE 纳米粒子性能卓越,可用作生物成像的荧光探针、高分辨率图案化的水性油墨和 LED 的光转换层,显示出其在多种应用领域的巨大潜力。
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来源期刊
Journal of Materials Science & Technology
Journal of Materials Science & Technology 工程技术-材料科学:综合
CiteScore
20.00
自引率
11.00%
发文量
995
审稿时长
13 days
期刊介绍: Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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