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<p>Stability is the primary hindrance for the application of halide perovskite material in light-emitting devices, solar cells, and other devices. In this work, halide perovskite and polymer composite film have been prepared for stable and bright light-emitting devices. Pure-phase Cs<sub>4</sub>PbBr<sub>6</sub> crystals have been synthesized, and their photoluminescence (PL) properties and fluorescence lifetimes have been investigated. The Cs<sub>4</sub>PbBr<sub>6</sub> crystals exhibited high uniformity but underwent rapid photodegradation under light irradiation. To address this issue, we prepared bright light-emitting devices using composite of Cs<sub>4</sub>PbBr<sub>6</sub> crystals and polyethylene oxide (PEO) as the emission layer. The aim was to improve the optical and physical properties of halide perovskites, such as photodegradation and stability. PEO, with its excellent film-forming ability, created a uniform and dense film on the halide perovskite surface, filling microscopic defects and providing a protective barrier. FTIR, morphology, and PL analyses confirmed the protective role of the halide perovskite and polymer composite film. The composite film light-emitting devices demonstrated improved stability and higher PL brightness, with a peak brightness approaching 3 × 10<sup>8</sup>&#xa0;cd/m<sup>2</sup>, which was approximately 75% higher than the pure halide perovskite devices.</p>

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Halide perovskite-polymer composite film for bright and stable light-emitting devices

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月20日

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  • Maoding Cheng,
  • Brooke Robinson,
  • Manoj Shah,
  • Emad Omar Badradeen,
  • Araceli Herrera Mondragon,
  • Roberto Gonzalez Rodriguez,
  • Jingbiao Cui,
  • Yuankun Lin,
  • Anupama B. Kaul,
  • Fumiya Watanabe,
  • Grant Wangila,
  • Mansour Mortazavi,
  • Chao Yan,
  • Zhanhu Guo,
  • Qinglong Jiang

摘要

Stability is the primary hindrance for the application of halide perovskite material in light-emitting devices, solar cells, and other devices. In this work, halide perovskite and polymer composite film have been prepared for stable and bright light-emitting devices. Pure-phase Cs4PbBr6 crystals have been synthesized, and their photoluminescence (PL) properties and fluorescence lifetimes have been investigated. The Cs4PbBr6 crystals exhibited high uniformity but underwent rapid photodegradation under light irradiation. To address this issue, we prepared bright light-emitting devices using composite of Cs4PbBr6 crystals and polyethylene oxide (PEO) as the emission layer. The aim was to improve the optical and physical properties of halide perovskites, such as photodegradation and stability. PEO, with its excellent film-forming ability, created a uniform and dense film on the halide perovskite surface, filling microscopic defects and providing a protective barrier. FTIR, morphology, and PL analyses confirmed the protective role of the halide perovskite and polymer composite film. The composite film light-emitting devices demonstrated improved stability and higher PL brightness, with a peak brightness approaching 3 × 108 cd/m2, which was approximately 75% higher than the pure halide perovskite devices.