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Bao Z, Hsiu CY, Fang MH, Majewska N, Sun W, Huang SJ, Yuan ECY, Chang YC, Chan JCC, Mahlik S, Zhou W, Yang CW, Lu KM, Liu RS. Formation and Near-Infrared Emission of CsPbI 3 Nanoparticles Embedded in Cs 4PbI 6 Crystals. ACS Appl Mater Interfaces 2021; 13:34742-34751. [PMID: 34264640 DOI: 10.1021/acsami.1c08920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Cs4PbI6, as a rarely investigated member of the Cs4PbX6 (X is a halogen element) family, has been successfully synthesized at low temperatures, and the synthetic conditions have been optimized. Metal iodides such as LiI, KI, NiI2, CoI2, and ZnI2, as additives, play an important role in enhancing the formation of the Cs4PbI6 microcrystals. ZnI2 with the lowest dissociation energy is the most efficient additive to supply iodide ions, and its amount of addition has also been optimized. Strong red to near-infrared (NIR) emission properties have been detected, and its optical emission centers have been identified to be numerous embedded perovskite-type α-CsPbI3 nanocrystallites (∼5 nm in diameter) based on investigations of temperature- and pressure-dependent photoluminescent properties. High-resolution transmission electron microscopy was used to detect these hidden nanoparticles, although the material was highly beam-sensitive and confirmed a "raisin bread"-like structure of the Cs4PbI6 crystals. A NIR mini-LED for the biological application has been successfully fabricated using as-synthesized Cs4PbI6 crystals. This work provides information for the future development of infrared fluorescent nanoscale perovskite materials.
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Affiliation(s)
- Zhen Bao
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Chiao-Yin Hsiu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Mu-Huai Fang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Natalia Majewska
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Gdańsk 80-308, Poland
| | - Weihao Sun
- School of Chemistry, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Shing-Jong Huang
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan
| | | | - Yu-Chun Chang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | | | - Sebastian Mahlik
- Institute of Experimental Physics, Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Gdańsk 80-308, Poland
| | - Wuzong Zhou
- School of Chemistry, University of St Andrews, St Andrews KY16 9ST, United Kingdom
| | - Chia-Wei Yang
- Everlight Electronics Co., Ltd., New Taipei City 238, Taiwan
| | - Kuang-Mao Lu
- Everlight Electronics Co., Ltd., New Taipei City 238, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
- Advanced Research Center of Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
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