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Red Low-threshold Amplified Spontaneous Emission of Perovskite Films Achieved by A-site Substitution and Defect Passivation
更新时间:2024-05-06
    • Red Low-threshold Amplified Spontaneous Emission of Perovskite Films Achieved by A-site Substitution and Defect Passivation

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    • 有研究者报道了一种新型的红光发射钙钛矿材料——CsPbI2Br。这种材料在光学增益介质领域展现出了卓越的热稳定性和合适的光学带隙,因此备受关注。然而,传统的溶液法制备方法使得这种薄膜在高湿度环境下容易发生相变,并且存在大量缺陷,这限制了其性能的提升。为了克服这些挑战,研究者采用了一种创新的方法。他们利用部分FA+(CH4N2+)进行A位取代,以提高钙钛矿薄膜的相稳定性。同时,他们还利用聚甲基丙烯酸甲酯(PMMA)对钙钛矿薄膜进行表面钝化。这些改进措施共同提升了薄膜的形貌和缺陷钝化效果。经过优化后的Cs0.7FA0.3PbI2Br钙钛矿薄膜展现出了令人瞩目的性能。它不仅实现了低阈值的红光放大自发辐射(ASE),而且发射波长达到了689 nm。在纳秒激光激发下,其阈值仅为15 μJ/cm2。此外,这种薄膜还具有良好的疏水性和光稳定性。在大气湿度环境下(RH = 40±10 %),经过3000 μJ/cm2脉冲激光持续照射120分钟后,其ASE强度仍能维持初始值的93%。这项研究不仅为低阈值高稳定的红光ASE和激光的实现提供了重要参考,而且为钙钛矿材料在光学增益介质领域的应用开辟了新的方向。这一成果有望推动相关领域的进一步发展,为未来的科技应用带来更多可能性。
    • Chinese Journal of Luminescence   Pages: 1-9(2024)
    • DOI:10.37188/CJL.20240075    

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    • Published Online:26 April 2024

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  • WANG Liang,YAN Mengtong,LI Yan,et al.Red Low-threshold Amplified Spontaneous Emission of Perovskite Films Achieved by A-site Substitution and Defect Passivation[J].Chinese Journal of Luminescence, DOI:10.37188/CJL.20240075

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