Flexible, photoluminescent 0D Cs4PbX6 (X = Br, Br/I)–PMMA composite films for white LED via water-induced recrystallization

Wei-Heng Shih; Yuang Ji; Shihai Wang; Haohan Yang; Donghai Lin; Wan Y Shih

doi:10.1557/s43578-024-01326-4

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Flexible, photoluminescent 0D Cs4PbX6 (X = Br, Br/I)–PMMA composite films for white LED via water-induced recrystallization

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Flexible, photoluminescent 0D Cs4PbX6 (X = Br, Br/I)–PMMA composite films for white LED via water-induced recrystallization

Wei-Heng Shih, Yuang Ji, Shihai Wang, Haohan Yang, Donghai Lin and Wan Y Shih

Journal of materials research, v 39, pp 1513-1524

16 May 2024

DOI: https://doi.org/10.1557/s43578-024-01326-4

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Abstract

3D CsPbX3 inorganic perovskite materials have attracted much attention in optoelectronic devices because of their strong absorbance, high photoluminescent quantum yield, tunable band gap, and narrow emission bandwidth. However, their practical usefulness is limited due to their poor stability in ambient conditions. Here, we created photoluminescent 0D Cs4PbX6 (X = Br, Br/I) suspensions in toluene by adding a small amount of water. The photoluminescent 0D Cs4PbX6 perovskite was mixed with polymethylmethacrylate (PMMA) forming 0D Cs4PbX6/PMMA composite films with higher PL, stability, transparency, and transmittance than that of the 3D CsPbX3/PMMA composite films prepared separately. Moreover, the PL intensity maintains 90% of the initial value after 30 days in water, showing excellent water stability. The flexible white-light LED device prepared by the composite films illustrated good luminescence performance with color rendering index 74.77, chromaticity coordinates (0.32, 0.33), and color temperature 6997 K.

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Title: Flexible, photoluminescent 0D Cs4PbX6 (X = Br, Br/I)–PMMA composite films for white LED via water-induced recrystallization
Creators: Wei-Heng Shih (Corresponding Author) - Drexel University, Materials Science and Engineering
Yuang Ji
Shihai Wang
Haohan Yang
Donghai Lin
Wan Y Shih - Drexel University, School of Biomedical Engineering, Science, and Health Systems
Publication Details: Journal of materials research, v 39, pp 1513-1524
Publisher: Springer Nature
Resource Type: Journal article
Language: English
Academic Unit: School of Biomedical Engineering, Science, and Health Systems; Materials Science and Engineering
Web of Science ID: WOS:001226819900001
Scopus ID: 2-s2.0-85193285326
Other Identifier: 991021876115704721

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Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Materials Science, Multidisciplinary