Spatial and Chemical Dual Nano-Confined Ultrastable Perovskite Quantum Dots Glass Manifesting Exciton Modulation

IF 8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Optical Materials Pub Date : 2024-06-12 DOI:10.1002/adom.202400630

Pengwei Wang, Zhiping Hu, Peixi Cong, Fengxian Zhou, Qi Yue, Zixiao Xue, Chenfang Lin, Ying Jiang, Juan Du, Anlian Pan, Long Zhang, Jiabin Cui, Jin He

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Abstract

Nano-confined synthesis of perovskite quantum dots (QDs) in solid matrix is emerging as a promising route to solve their long-standing stability problem. Utilizing sol-gel derived nanoporous glass as matrix that has high flexibility in chemical composition and pore size, a novel spatial and chemical dual nano-confined strategy is presented for the synthesis of ultrastable perovskite QDs with tunable composition and bandgap in glass. The findings reveal that the Pb─O bonding is formed at perovskite QDs/glass interface during a nano-confined chemical vapor deposition (CVD) reaction. In particular, the presence of interfacial chemical bonding is discovered to be critical for passivating surface traps and stabilizing the perovskite QDs during the final densification process (related photoluminescence intensity maintained ≈100% after immersed in aqueous solution for 30 days). Series optical spectroscopy unravels the exciton modulation (80 meV) of perovskite QDs in nanoporous and densified glass related to the unique combination of dual physical and chemistry nano-confined effect. By shedding light on the nano-confined growth of functional nanocrystals, the research offers the key paths for fabricating high-performance perovskite devices.

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空间和化学双纳米约束超稳定 Perovskite 量子点玻璃表现出的激子调制

在固体基质中纳米封闭合成包光体量子点（QDs）是解决其长期稳定性问题的一条很有前景的途径。溶胶-凝胶法衍生出的纳米多孔玻璃在化学成分和孔径大小方面具有很高的灵活性，本研究利用这种基质，提出了一种新颖的空间和化学双重纳米约束策略，用于在玻璃中合成具有可调成分和带隙的超稳定包光体量子点。研究结果表明，在纳米约束化学气相沉积（CVD）反应过程中，Pb─O 键形成于包晶QDs/玻璃界面。特别是，在最后的致密化过程中，发现界面化学键的存在对于钝化表面陷阱和稳定包晶QD至关重要（在水溶液中浸泡30天后，相关的光致发光强度保持在≈100%）。系列光学光谱揭示了在纳米多孔和致密化玻璃中的包光体 QD 的激子调制（80 meV），这与独特的物理和化学双重纳米约束效应相结合有关。通过揭示功能纳米晶体的纳米约束生长，该研究为制造高性能的过氧化物器件提供了关键路径。

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来源期刊

Advanced Optical Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

13.70

自引率

6.70%

发文量

883

审稿时长

1.5 months

期刊介绍： Advanced Optical Materials, part of the esteemed Advanced portfolio, is a unique materials science journal concentrating on all facets of light-matter interactions. For over a decade, it has been the preferred optical materials journal for significant discoveries in photonics, plasmonics, metamaterials, and more. The Advanced portfolio from Wiley is a collection of globally respected, high-impact journals that disseminate the best science from established and emerging researchers, aiding them in fulfilling their mission and amplifying the reach of their scientific discoveries.

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