journal article·2024-07

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

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

Advanced Optical Materials· Volume 12· Issue 21
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Abstract

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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Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory for Micro‐Nano Physics and Technology of Hunan Province Hunan Institute of Optoelectronic Integration College of Materials Science and Engineering School of Physics and Electronics Hunan University Changsha 410082 China

Key Laboratory of Materials for High Power Laser Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China

Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 China

Department of Materials University of Oxford Parks Road Oxford OX1 3PH UK

School of Physics and Electronics Hunan Normal University Changsha 410081 China

The Center for Molecular Imaging and Nuclear Medicine State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions Soochow University Suzhou 215123 China

Funding

Natural Science Foundation of Jiangsu Province · National Key Research and Development Program of China

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