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<p>The advancements in flexible display technology impose stringent demands on the optical properties and environmental stability of perovskite luminescent materials. Addressing the core challenges of poor environmental stability and optical performance degradation in methylammonium lead bromide (MAPbBr<sub>3</sub>) quantum dots, this study proposes a dual-stability strategy combining “internal crystallization regulation” with “external physical protection.” A ZnO/MAPbBr<sub>3</sub>/PVDF composite film was prepared through synergistic modification with zinc oxide (ZnO) and polyvinylidene fluoride (PVDF), with the optimal ZnO content identified as 40&#xa0;μL. Under these conditions, the composite film exhibited a green light emission full width at half maximum (FWHM) as low as 19.88&#xa0;nm and a photoluminescence quantum yield (PLQY) of 76.06%, demonstrating high color purity. After heating at 100°C for 60&#xa0;min, the PL intensity decayed by only 30%, and after 168&#xa0;h of immersion in water, it retained 65% of its initial PL intensity, indicating significantly enhanced environmental tolerance. When this film served as the green conversion layer integrated with red CsPbI<sub>3</sub> quantum dot films and GaN blue LEDs to form a white light-emitting diode (WLED), the device achieved a color gamut coverage of 126% of the NTSC standard and 94% of the Rec. 2020 specification. Research indicates that ZnO enhances crystalline integrity by regulating MAPbBr<sub>3</sub> nucleation and growth, while PVDF forms a compact hydrophobic barrier. Their combined effect enhances both the film’s optical performance and environmental stability, enabling WLEDs with ultrawide color gamut that meet the requirements of high-performance flexible display and lighting applications.</p>

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Synergistic Anchoring and Passivation by ZnO in MAPbBr3/PVDF Films for Enhanced Optical Performance and Environmental Stability in WLEDs

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Dusong Hou,
  • Danhong Gao,
  • Hongwei Liu,
  • Hanling Deng,
  • Qianyao Lu,
  • Fan Xiong,
  • Hengwei Shao,
  • Yuanyuan Lu,
  • Mengxin Wang,
  • Xinjian He,
  • Sheng Huang

摘要

The advancements in flexible display technology impose stringent demands on the optical properties and environmental stability of perovskite luminescent materials. Addressing the core challenges of poor environmental stability and optical performance degradation in methylammonium lead bromide (MAPbBr3) quantum dots, this study proposes a dual-stability strategy combining “internal crystallization regulation” with “external physical protection.” A ZnO/MAPbBr3/PVDF composite film was prepared through synergistic modification with zinc oxide (ZnO) and polyvinylidene fluoride (PVDF), with the optimal ZnO content identified as 40 μL. Under these conditions, the composite film exhibited a green light emission full width at half maximum (FWHM) as low as 19.88 nm and a photoluminescence quantum yield (PLQY) of 76.06%, demonstrating high color purity. After heating at 100°C for 60 min, the PL intensity decayed by only 30%, and after 168 h of immersion in water, it retained 65% of its initial PL intensity, indicating significantly enhanced environmental tolerance. When this film served as the green conversion layer integrated with red CsPbI3 quantum dot films and GaN blue LEDs to form a white light-emitting diode (WLED), the device achieved a color gamut coverage of 126% of the NTSC standard and 94% of the Rec. 2020 specification. Research indicates that ZnO enhances crystalline integrity by regulating MAPbBr3 nucleation and growth, while PVDF forms a compact hydrophobic barrier. Their combined effect enhances both the film’s optical performance and environmental stability, enabling WLEDs with ultrawide color gamut that meet the requirements of high-performance flexible display and lighting applications.