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<p>In response to the poor stability of perovskite nanocrystals (PeNCs), a CsPbBr<sub>3</sub>@EVA composite film was developed through encapsulating the CsPbBr<sub>3</sub> NCs into a flexible polymer material, ethylene vinyl acetate copolymer (EVA). In order to enhance the stability of the CsPbBr<sub>3</sub>@EVA composite films, the surface of CsPbBr<sub>3</sub> NCs was passivated with the C<sub>10</sub>H<sub>14</sub>O<sub>5</sub>Ti ligand before the encapsulation. When the addition amount of C<sub>10</sub>H<sub>14</sub>O<sub>5</sub>Ti solution was 50 <i>μ</i>L, the composite film displayed the highest photoluminescence (PL) intensity, which was 1.39 times higher than that without undergoing the passivation. In addition, the obtained CsPbBr<sub>3</sub>-Ti/EVA film exhibited better water, thermal, and ambient stability. Finally, the CsPbBr<sub>3</sub>-Ti/EVA composite film was coated onto a crystal Si cell and hot pressed, resulting in an increase of power conversion efficiency from 14.21% to 14.82% under standard solar irradiation.</p>

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Enhanced Stability and Luminescence of Perovskite CsPbBr3 Nanocrystals via Formation of EVA-Derived Nanocomposite Films

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Feng Tong,
  • Zijun Huang,
  • Xiuquan Gu,
  • Zheng Chen

摘要

In response to the poor stability of perovskite nanocrystals (PeNCs), a CsPbBr3@EVA composite film was developed through encapsulating the CsPbBr3 NCs into a flexible polymer material, ethylene vinyl acetate copolymer (EVA). In order to enhance the stability of the CsPbBr3@EVA composite films, the surface of CsPbBr3 NCs was passivated with the C10H14O5Ti ligand before the encapsulation. When the addition amount of C10H14O5Ti solution was 50 μL, the composite film displayed the highest photoluminescence (PL) intensity, which was 1.39 times higher than that without undergoing the passivation. In addition, the obtained CsPbBr3-Ti/EVA film exhibited better water, thermal, and ambient stability. Finally, the CsPbBr3-Ti/EVA composite film was coated onto a crystal Si cell and hot pressed, resulting in an increase of power conversion efficiency from 14.21% to 14.82% under standard solar irradiation.