4.8 Article

Tunable Green Light-Emitting CsPbBr3 Based Perovskite-Nanocrystals-in-Glass Flexible Film Enables Production of Stable Backlight Display

期刊

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 13, 期 21, 页码 4701-4709

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c00076

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资金

  1. National Natural Science Foundation of China [51872207, 52072271]
  2. Guangxi Natural Science Foundation [2017GXNSFGA198005]
  3. special fund of Guangxi Bagui Scholars

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A facile strategy for producing flexible films containing CsPbBr3 nanocrystals has been reported, allowing for large-area coverage of white-light emission. These films exhibit excellent performance and are suitable for practical ultra-high-definition displays.
Despite recent advances in producing perovskite-nanocrystals-in-glass (PNG) for display application, it remains challenging to achieve ultrapure and large-area CsPbBr3 PNG-based flexible films with tunable green emission. Herein, we report a facile strategy to produce flexible film containing CsPbBr3 PNG. Specifically, the achievement of CsPbBr3 PNG with tunable green emissions (517-528 nm) is realized by elaborate regulation of the glass precursor concentration and thermal treatment temperature by an in situ growth method. With the integration of red-light-emitting CsPbBrxI3-x PNG powder, the color gamut of as-prepared whitelight-emitting sources can cover up to 126.27% of the NTSC 1953 standard and 93.9% of the Rec. 2020 standard. Notably, flexible and large-area whitelight-emitting films can be readily obtained by sandwiching and gluing mixed PNG powders between two layers of hydrophobic and transparent PET films. Intriguingly, as-prepared PNG films exhibit excellent hydrothermal, photostability, and long-term operation stability, making them promising for practical ultrahigh-definition displays.

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